diff --git a/ARM64_RPI.sh b/ARM64_RPI.sh
index f4b0c29..46690bd 100755
--- a/ARM64_RPI.sh
+++ b/ARM64_RPI.sh
@@ -5,23 +5,18 @@
 #
 # To make this file executable:
 #
-# $ chmod +x ARM64_RPI.sh
+# $ chmod +rx ARM64_RPI.sh
 #
 # To execute this file:
 #
 # $ ./ARM64_RPI.sh
 
-sed -i 's/CONFIG_PLATFORM_I386_PC = y/CONFIG_PLATFORM_I386_PC = n/g' Makefile
+sed -i '/^CONFIG_PLATFORM_/             s/ *=.*/ = n/
+        /^CONFIG_PLATFORM_ARM64_RPI *=/ s/ *=.*/ = y/' Makefile || {
+    status=$?
+    printf 'An error occurred and Raspberry Pi OS (64 bit) support was not turned on in Makefile.\n'
+    exit "$status"
+}
 
-sed -i 's/CONFIG_PLATFORM_ARM_RPI = y/CONFIG_PLATFORM_ARM_RPI = n/g' Makefile
-
-sed -i 's/CONFIG_PLATFORM_ARM64_RPI = n/CONFIG_PLATFORM_ARM64_RPI = y/g' Makefile
-RESULT=$?
-
-if [[ "$RESULT" != "0" ]]; then
-	echo "An error occurred and Raspberry Pi OS (64 bit) support was not turned on in Makefile."
-	exit 1
-else
-	echo "Raspberry Pi OS (64 bit) support was turned on in Makefile as planned."
-	exit 0
-fi
+printf 'Raspberry Pi OS (64 bit) support was turned on in Makefile as planned.\n'
+exit 0
diff --git a/ARM_RPI.sh b/ARM_RPI.sh
index 684eecf..ff6fad9 100755
--- a/ARM_RPI.sh
+++ b/ARM_RPI.sh
@@ -13,17 +13,12 @@
 
 # getconf LONG_BIT (need to work on this)
 
-sed -i 's/CONFIG_PLATFORM_I386_PC = y/CONFIG_PLATFORM_I386_PC = n/g' Makefile
+sed -i '/^CONFIG_PLATFORM_/             s/ *=.*/ = n/
+        /^CONFIG_PLATFORM_ARM_RPI *=/   s/ *=.*/ = y/' Makefile || {
+    status=$?
+    printf 'An error occurred and Raspberry Pi OS (32 bit) support was not turned on in Makefile.\n'
+    exit "$status"
+}
 
-sed -i 's/CONFIG_PLATFORM_ARM_RPI = n/CONFIG_PLATFORM_ARM_RPI = y/g' Makefile
-RESULT=$?
-
-if [[ "$RESULT" != "0" ]]; then
-	echo "An error occurred and Raspberry Pi OS (32 bit) support was not turned on in Makefile."
-	exit 1
-else
-	echo "Raspberry Pi OS (32 bit) support was turned on in Makefile as planned."
-	exit 0
-fi
-
-sed -i 's/CONFIG_PLATFORM_ARM64_RPI = y/CONFIG_PLATFORM_ARM64_RPI = n/g' Makefile
+printf 'Raspberry Pi OS (32 bit) support was turned on in Makefile as planned.\n'
+exit 0
diff --git a/cmode-off.sh b/cmode-off.sh
index 39fd8c5..9c37211 100755
--- a/cmode-off.sh
+++ b/cmode-off.sh
@@ -12,12 +12,11 @@
 #
 # $ ./cmode-off.sh
 
-sed -i 's/CONFIG_CONCURRENT_MODE = y/CONFIG_CONCURRENT_MODE = n/g' Makefile
-RESULT=$?
+sed -i '/^CONFIG_CONCURRENT_MODE *=/ s/ *=.*/ = n/' Makefile || {
+    status=$?
+    printf 'An error occurred and Concurrent Mode was not turned off in Makefile.\n'
+    exit "$status"
+}
 
-if [[ "$RESULT" != "0" ]]; then
-	echo "An error occurred and Concurrent Mode was not turned off in Makefile."
-	exit 1
-else
-	echo "Concurrent Mode was turned off in Makefile as planned."
-fi
+printf 'Concurrent Mode was turned off in Makefile as planned.\n'
+exit 0
diff --git a/cmode-on.sh b/cmode-on.sh
index 79938a5..b576e46 100755
--- a/cmode-on.sh
+++ b/cmode-on.sh
@@ -12,12 +12,11 @@
 #
 # $ ./cmode-on.sh
 
-sed -i 's/CONFIG_CONCURRENT_MODE = n/CONFIG_CONCURRENT_MODE = y/g' Makefile
-RESULT=$?
+sed -i '/^CONFIG_CONCURRENT_MODE *=/ s/ *=.*/ = y/' Makefile || {
+    status=$?
+    printf 'An error occurred and Concurrent Mode was not turned on in Makefile.\n'
+    exit "$status"
+}
 
-if [[ "$RESULT" != "0" ]]; then
-	echo "An error occurred and Concurrent Mode was not turned on in Makefile."
-	exit 1
-else
-	echo "Concurrent Mode was turned on in Makefile as planned."
-fi
+printf 'Concurrent Mode was turned on in Makefile as planned.\n'
+exit 0
diff --git a/edit-options.sh b/edit-options.sh
index 0fd6f18..2f9e822 100755
--- a/edit-options.sh
+++ b/edit-options.sh
@@ -1,7 +1,5 @@
 #!/bin/bash
 #
-OPTIONS_FILE="88x2bu.conf"
-SCRIPT_NAME="edit-options.sh"
 #
 # Purpose: Make it easier to edit the driver options file.
 #
@@ -13,18 +11,21 @@ SCRIPT_NAME="edit-options.sh"
 #
 # $ sudo ./edit-options.sh
 #
-if [[ $EUID -ne 0 ]]
+
+options_file=88x2bu.conf
+
+if (( EUID != 0 ))
 then
-	echo "You must run this script with superuser (root) privileges."
-	echo "Try: \"sudo ./${SCRIPT_NAME}\""
-	exit 1
+    printf 'You must run this script with superuser (root) privileges.\n'
+    printf 'Try: "sudo %s"\n' "$0"
+    exit 1
 fi
 
-nano /etc/modprobe.d/${OPTIONS_FILE}
+${EDITOR:-nano} "/etc/modprobe.d/$options_file"
 
-read -p "Do you want to apply the new options by rebooting now? [y/N] " -n 1 -r
-echo    # move to a new line
-if [[ $REPLY =~ ^[Yy]$ ]]
+read -p 'Do you want to apply the new options by rebooting now? [y/N] ' -n 1 -r || exit 1
+printf '\n'    # move to a next line
+if [[ $REPLY = [Yy] ]]
 then
     reboot
 fi
diff --git a/install-driver-no-dkms.sh b/install-driver-no-dkms.sh
index da61cb7..7a8ef3f 100755
--- a/install-driver-no-dkms.sh
+++ b/install-driver-no-dkms.sh
@@ -4,42 +4,45 @@
 #
 # This version of the installation script does not use dkms.
 
-SCRIPT_NAME="install-driver-no-dkms.sh"
-SCRIPT_VERSION="20220821"
-OPTIONS_FILE="88x2bu.conf"
-BLACKLIST_FILE="rtw88_8822bu.conf"
+SCRIPT_VERSION=20220923
 
-# support for NoPrompt allows non-interactive use of this script
-NO_PROMPT=0
-
-# get the options
-while [ $# -gt 0 ]
-do
-	case $1 in
-		NoPrompt)
-			NO_PROMPT=1 ;;
-		*h|*help|*)
-			echo "Syntax $0 <NoPrompt>"
-			echo "       NoPrompt - noninteractive mode"
-			echo "       -h|--help - Show help"
-			exit 1
-			;;
-	esac
-	shift
-done
+options_file=88x2bu.conf
+blacklist_file=rtw88_8822bu.conf
 
 # check to ensure sudo was used
-if [[ $EUID -ne 0 ]]
+if (( EUID != 0 ))
 then
-	echo "You must run this script with superuser (root) privileges."
-	echo "Try: \"sudo ./${SCRIPT_NAME}\""
-	exit 1
+    printf 'You must run this script with superuser (root) privileges.\n'
+    printf 'Try: "sudo %s"\n' "$0"
+    exit 1
 fi
 
+# support for NoPrompt allows non-interactive use of this script
+no_prompt=0
+
+# get the options
+for ((;$#;)) do
+    case $1 in
+      NoPrompt)
+        no_prompt=1 ;;
+      -h|--help|*)
+        cat <<- EndOfHelp
+		Usage: $0 [NoPrompt]
+		       $0 --help
+		    NoPrompt - noninteractive mode
+		    -h|--help - Show help
+		EndOfHelp
+        [[ $1 = -h || $1 = --help ]] # don't use non-zero exit status when help requested
+        exit
+        ;;
+    esac
+    shift
+done
+
 # information that helps with bug reports
 
 # displays script name and version
-echo "Running ${SCRIPT_NAME} version ${SCRIPT_VERSION}"
+printf 'Running %s version %s\n' "${0##*/}" "$SCRIPT_VERSION"
 
 # kernel
 uname -r
@@ -47,65 +50,56 @@ uname -r
 # architecture - for ARM: aarch64 = 64 bit, armv7l = 32 bit
 uname -m
 
-echo "Starting installation..."
+printf 'Starting installation...\n'
 
 # sets module parameters (driver options)
-echo "Copying ${OPTIONS_FILE} to: /etc/modprobe.d"
-cp -f ${OPTIONS_FILE} /etc/modprobe.d
-
 # blacklist the in-kernel module (driver) so that there is no conflict
-echo "Copying ${BLACKLIST_FILE} to: /etc/modprobe.d"
-cp -f ${BLACKLIST_FILE} /etc/modprobe.d
+printf 'Copying options and blacklist files into /etc/modprobe.d\n'
+cp -fv "$options_file" "$blacklist_file" /etc/modprobe.d
 
 make clean
 
-make
-RESULT=$?
+make || {
+    status=$?
+    printf 'An error occurred. Error = %d\n' "$status"
+    printf 'Please report this error.\n'
+    printf 'Please copy all screen output and paste it into the report.\n'
+    printf 'You will need to run the following before reattempting installation.\n'
+    printf '$ sudo ./remove-driver-no-dkms.sh\n'
+    exit "$status"
+}
 
-if [[ "$RESULT" != "0" ]]
-then
-	echo "An error occurred. Error = ${RESULT}"
-	echo "Please report this error."
-	echo "Please copy all screen output and paste it into the report."
-	echo "You will need to run the following before reattempting installation."
-	echo "$ sudo ./remove-driver-no-dkms.sh"
-	exit $RESULT
-fi
+make install || {
+    status=$?
+    printf 'An error occurred. Error = %d\n' "$status"
+    printf 'Please report this error.\n'
+    printf 'Please copy all screen output and paste it into the report.\n'
+    printf 'You will need to run the following before reattempting installation.\n'
+    printf '$ sudo %s\n' "${*:0}"
+    exit "$status"
+}
 
-make install
-RESULT=$?
-
-if [[ "$RESULT" != "0" ]]
-then
-	echo "An error occurred. Error = ${RESULT}"
-	echo "Please report this error."
-	echo "Please copy all screen output and paste it into the report."
-	echo "You will need to run the following before reattempting installation."
-	echo "$ sudo ./remove-driver-no-dkms.sh"
-	exit $RESULT
-fi
-
-echo "The driver was installed successfully."
+printf 'The driver was installed successfully.\n'
 
 # unblock wifi
 rfkill unblock wlan
 
 # if NoPrompt is not used, ask user some questions to complete installation
-if [ $NO_PROMPT -ne 1 ]
+if (( ! no_prompt ))
 then
-	read -p "Do you want to edit the driver options file now? [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		nano /etc/modprobe.d/${OPTIONS_FILE}
-	fi
+    read -p 'Do you want to edit the driver options file now? [y/N] ' -n 1 -r || exit 1
+    printf '\n'
+    if [[ $REPLY = [Yy] ]]
+    then
+        ${EDITOR:-nano} "/etc/modprobe.d/$options_file"
+    fi
 
-	read -p "Do you want to reboot now? (recommended) [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		reboot
-	fi
+    read -p 'Do you want to reboot now? (recommended) [y/N] ' -n 1 -r || exit 1
+    printf '\n'
+    if [[ $REPLY = [Yy] ]]
+    then
+        reboot
+    fi
 fi
 
 exit 0
diff --git a/install-driver.sh b/install-driver.sh
index 16abc50..25079c7 100755
--- a/install-driver.sh
+++ b/install-driver.sh
@@ -4,59 +4,61 @@
 #
 # This version of the installation script uses dkms.
 
-SCRIPT_NAME="install-driver.sh"
-SCRIPT_VERSION="20220821"
-OPTIONS_FILE="88x2bu.conf"
-BLACKLIST_FILE="rtw88_8822bu.conf"
+SCRIPT_VERSION=20220923
 
-DRV_NAME="rtl88x2bu"
-DRV_VERSION="5.13.1"
+options_file=88x2bu.conf
+blacklist_file=rtw88_8822bu.conf
 
-DRV_DIR="$(pwd)"
-KRNL_VERSION="$(uname -r)"
+drv_name=rtl88x2bu
+drv_version=5.13.1
+
+drv_dir=$PWD
 
 clear
 
 # support for NoPrompt allows non-interactive use of this script
-NO_PROMPT=0
+no_prompt=0
 
 # get the options
-while [ $# -gt 0 ]
-do
-	case $1 in
-		NoPrompt)
-			NO_PROMPT=1 ;;
-		*h|*help|*)
-			echo "Syntax $0 <NoPrompt>"
-			echo "       NoPrompt - noninteractive mode"
-			echo "       -h|--help - Show help"
-			exit 1
-			;;
-	esac
-	shift
+for ((;$#;)) do
+    case $1 in
+      NoPrompt)
+        no_prompt=1 ;;
+      *h|*help|*)
+        cat <<- EndOfHelp
+		Usage: $0 [NoPrompt]
+		       $0 --help
+		    NoPrompt - noninteractive mode
+		    -h|--help - Show help
+		EndOfHelp
+        [[ $1 = -h || $1 = --help ]] # don't use non-zero exit status when help requested
+        exit
+        ;;
+    esac
+    shift
 done
 
 # check to ensure sudo was used
-if [[ $EUID -ne 0 ]]
+if (( EUID != 0 ))
 then
-	echo "You must run this script with superuser (root) privileges."
-	echo "Try: \"sudo ./${SCRIPT_NAME}\""
-	exit 1
+    printf 'You must run this script with superuser (root) privileges.\n'
+    printf 'Try: "sudo %s"\n' "$0"
+    exit 1
 fi
 
 # check for previous installation
-if [[ -d "/usr/src/${DRV_NAME}-${DRV_VERSION}" ]]
+if [[ -d "/usr/src/$drv_name-$drv_version" ]]
 then
-	echo "It appears that this driver may already be installed."
-	echo "You will need to run the following before reattempting installation."
-	echo "$ sudo ./remove-driver.sh"
-	exit 1
+    printf 'It appears that this driver may already be installed.\n'
+    printf 'You will need to run the following before reattempting installation.\n'
+    printf '$ sudo ./remove-driver.sh\n'
+    exit 1
 fi
 
 # information that helps with bug reports
 
 # displays script name and version
-echo "Running ${SCRIPT_NAME} version ${SCRIPT_VERSION}"
+printf 'Running %s version %s\n' "${0##*/}" "$SCRIPT_VERSION"
 
 # kernel
 uname -r
@@ -64,80 +66,68 @@ uname -r
 # architecture - for ARM: aarch64 = 64 bit, armv7l = 32 bit
 uname -m
 
-echo "Starting installation..."
+printf 'Starting installation...\n'
 
-# the add command requires source in /usr/src/${DRV_NAME}-${DRV_VERSION}
-echo "Copying source files to: /usr/src/${DRV_NAME}-${DRV_VERSION}"
-cp -rf "${DRV_DIR}" /usr/src/${DRV_NAME}-${DRV_VERSION}
+# the add command requires source in "/usr/src/$drv_name-$drv_version"
+printf 'Copying source files to: %s\n' "/usr/src/$drv_name-$drv_version"
+cp -rf "$drv_dir" "/usr/src/$drv_name-$drv_version"
 
 # sets module parameters (driver options)
-echo "Copying ${OPTIONS_FILE} to: /etc/modprobe.d"
-cp -f ${OPTIONS_FILE} /etc/modprobe.d
-
 # blacklist the in-kernel module (driver) so that there is no conflict
-echo "Copying ${BLACKLIST_FILE} to: /etc/modprobe.d"
-cp -f ${BLACKLIST_FILE} /etc/modprobe.d
+printf 'Copying options and blacklist files into: %s\n' "/etc/modprobe.d"
+cp -fv "$options_file" "$blacklist_file" /etc/modprobe.d
 
-dkms add -m ${DRV_NAME} -v ${DRV_VERSION}
-RESULT=$?
+dkms add -m "$drv_name" -v "$drv_version" || {
+    status=$?
+    printf 'An error occurred. dkms add error = %d\n' "$status"
+    printf 'Please report this error.\n'
+    printf 'Please copy all screen output and paste it into the report.\n'
+    printf 'You will need to run the following before reattempting installation.\n'
+    printf '$ sudo ./remove-driver.sh\n'
+    exit "$status"
+}
 
-if [[ "$RESULT" != "0" ]]
-then
-	echo "An error occurred. dkms add error = ${RESULT}"
-	echo "Please report this error."
-	echo "Please copy all screen output and paste it into the report."
-	echo "You will need to run the following before reattempting installation."
-	echo "$ sudo ./remove-driver.sh"
-	exit $RESULT
-fi
+dkms build -m "$drv_name" -v "$drv_version" || {
+    status=$?
+    printf 'An error occurred. dkms build error = %d\n' "$status"
+    printf 'Please report this error.\n'
+    printf 'Please copy all screen output and paste it into the report.\n'
+    printf 'You will need to run the following before reattempting installation.\n'
+    printf '$ sudo ./remove-driver.sh\n'
+    exit "$status"
+}
 
-dkms build -m ${DRV_NAME} -v ${DRV_VERSION}
-RESULT=$?
+dkms install -m "$drv_name" -v "$drv_version" || {
+    status=$?
+    printf 'An error occurred. dkms install error = %d\n' "$status"
+    printf 'Please report this error.\n'
+    printf 'Please copy all screen output and paste it into the report.\n'
+    printf 'You will need to run the following before reattempting installation.\n'
+    printf '$ sudo ./remove-driver.sh\n'
+    exit "$status"
+}
 
-if [[ "$RESULT" != "0" ]]
-then
-	echo "An error occurred. dkms build error = ${RESULT}"
-	echo "Please report this error."
-	echo "Please copy all screen output and paste it into the report."
-	echo "You will need to run the following before reattempting installation."
-	echo "$ sudo ./remove-driver.sh"
-	exit $RESULT
-fi
-
-dkms install -m ${DRV_NAME} -v ${DRV_VERSION}
-RESULT=$?
-
-if [[ "$RESULT" != "0" ]]
-then
-	echo "An error occurred. dkms install error = ${RESULT}"
-	echo "Please report this error."
-	echo "Please copy all screen output and paste it into the report."
-	echo "You will need to run the following before reattempting installation."
-	echo "$ sudo ./remove-driver.sh"
-	exit $RESULT
-fi
-
-echo "The driver was installed successfully."
+printf 'The driver was installed successfully.\n'
 
 # unblock wifi
 rfkill unblock wlan
 
 # if NoPrompt is not used, ask user some questions to complete installation
-if [ $NO_PROMPT -ne 1 ]
+if (( ! no_prompt ))
 then
-	read -p "Do you want to edit the driver options file now? [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		nano /etc/modprobe.d/${OPTIONS_FILE}
-	fi
+    read -p 'Do you want to edit the driver options file now? [y/N] ' -n 1 -r || exit 1
+    printf '\n'
+    if [[ $REPLY = [Yy] ]]
+    then
+        ${EDITOR:-nano} "/etc/modprobe.d/$options_file"
+    fi
 
-	read -p "Do you want to reboot now? (recommended) [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		reboot
-	fi
+    read -p 'Do you want to reboot now? (recommended) [y/N] ' -n 1 -r || exit 1
+    printf '\n'
+    if [[ $REPLY = [Yy] ]]
+    then
+        reboot
+    fi
 fi
 
 exit 0
diff --git a/remove-driver-no-dkms.sh b/remove-driver-no-dkms.sh
index e8a93b5..7eaa5fe 100755
--- a/remove-driver-no-dkms.sh
+++ b/remove-driver-no-dkms.sh
@@ -4,67 +4,66 @@
 #
 # This version of the removal script does not use dkms.
 
-SCRIPT_NAME="remove-driver-no-dkms.sh"
-SCRIPT_VERSION="20220821"
-OPTIONS_FILE="88x2bu.conf"
-BLACKLIST_FILE="rtw88_8822bu.conf"
+SCRIPT_VERSION=20220923
 
-echo "Running ${SCRIPT_NAME} version ${SCRIPT_VERSION}"
-
-# support for NoPrompt allows non-interactive use of this script
-NO_PROMPT=0
-
-# get the options
-while [ $# -gt 0 ]
-do
-	case $1 in
-		NoPrompt)
-			NO_PROMPT=1 ;;
-		*h|*help|*)
-			echo "Syntax $0 <NoPrompt>"
-			echo "       NoPrompt - noninteractive mode"
-			echo "       -h|--help - Show help"
-			exit 1
-			;;
-	esac
-	shift
-done
+options_file=88x2bu.conf
+blacklist_file=rtw88_8822bu.conf
 
 # check to ensure sudo was used
-if [[ $EUID -ne 0 ]]
+if (( EUID != 0 ))
 then
-	echo "You must run this script with superuser (root) privileges."
-	echo "Try: \"sudo ./${SCRIPT_NAME}\""
+	printf 'You must run this script with superuser (root) privileges.\n'
+	printf 'Try: "sudo %s"\n' "${*:0}"
 	exit 1
 fi
 
-echo "Starting removal..."
+printf 'Running %s version %s\n' "${0##*/}" "$SCRIPT_VERSION"
 
-make uninstall
-RESULT=$?
+# support for NoPrompt allows non-interactive use of this script
+no_prompt=0
 
-if [[ ("$RESULT" = "0")]]
+# get the options
+for ((;$#;)) do
+    case $1 in
+      NoPrompt)
+        no_prompt=1 ;;
+      -h|--help|*)
+        cat <<- EndOfHelp
+		Usage: $0 [NoPrompt]
+		       $0 --help
+		    NoPrompt - noninteractive mode
+		    -h|--help - Show help
+		EndOfHelp
+        [[ $1 = -h || $1 = --help ]] # don't use non-zero exit status when help requested
+        exit
+        ;;
+    esac
+    shift
+done
+
+printf 'Starting removal...\n'
+
+make uninstall || {
+    status=$?
+    printf 'An error occurred. Error = %u\n' "$status"
+    printf 'Please report this error.\n'
+    exit "$status"
+}
+
+printf 'Deleting options and blacklist files from /etc/modprobe.d'
+rm -fv "/etc/modprobe.d/$options_file" "/etc/modprobe.d/$blacklist_file"
+
+printf 'The driver was removed successfully.\n'
+printf 'You may now delete the driver directory if desired.\n'
+
+if (( ! no_prompt ))
 then
-	echo "Deleting ${OPTIONS_FILE} from /etc/modprobe.d"
-	rm -f /etc/modprobe.d/${OPTIONS_FILE}
-	echo "Deleting ${BLACKLIST_FILE} from /etc/modprobe.d"
-	rm -f /etc/modprobe.d/${BLACKLIST_FILE}
-	echo "The driver was removed successfully."
-	echo "You may now delete the driver directory if desired."
-else
-	echo "An error occurred. Error = ${RESULT}"
-	echo "Please report this error."
-	exit $RESULT
-fi
-
-if [ $NO_PROMPT -ne 1 ]
-then
-	read -p "Do you want to reboot now? (recommended) [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		reboot
-	fi
+    read -p 'Do you want to reboot now? (recommended) [y/N] ' -n 1 -r || exit
+    printf '\n'
+    if [[ $REPLY = [Yy] ]]
+    then
+        reboot
+    fi
 fi
 
 exit 0
diff --git a/remove-driver.sh b/remove-driver.sh
index dc230f6..7265fc3 100755
--- a/remove-driver.sh
+++ b/remove-driver.sh
@@ -4,79 +4,81 @@
 #
 # This version of the removal script uses dkms.
 
-SCRIPT_NAME="remove-driver.sh"
-SCRIPT_VERSION="20220821"
-OPTIONS_FILE="88x2bu.conf"
-BLACKLIST_FILE="rtw88_8822bu.conf"
+SCRIPT_VERSION=20220923
 
-DRV_NAME="rtl88x2bu"
-DRV_VERSION="5.13.1"
-
-DRV_DIR="$(pwd)"
-KRNL_VERSION="$(uname -r)"
-
-clear
-echo "Running ${SCRIPT_NAME} version ${SCRIPT_VERSION}"
-
-# support for NoPrompt allows non-interactive use of this script
-NO_PROMPT=0
-
-# get the options
-while [ $# -gt 0 ]
-do
-	case $1 in
-		NoPrompt)
-			NO_PROMPT=1 ;;
-		*h|*help|*)
-			echo "Syntax $0 <NoPrompt>"
-			echo "       NoPrompt - noninteractive mode"
-			echo "       -h|--help - Show help"
-			exit 1
-			;;
-	esac
-	shift
-done
+options_file=88x2bu.conf
+blacklist_file=rtw88_8822bu.conf
+drv_name=rtl88x2bu
+drv_version=5.13.1
 
 # check to ensure sudo was used
-if [[ $EUID -ne 0 ]]
+if (( EUID != 0 ))
 then
-	echo "You must run this script with superuser (root) privileges."
-	echo "Try: \"sudo ./${SCRIPT_NAME}\""
-	exit 1
+    printf 'You must run this script with superuser (root) privileges.\n'
+    printf 'Try: "sudo %s"\n' "${*:0}"
+    exit 1
 fi
 
-echo "Starting removal..."
+clear
+printf 'Running %s version %s\n' "${0##*/}" "$SCRIPT_VERSION"
 
-dkms remove -m ${DRV_NAME} -v ${DRV_VERSION} --all
-RESULT=$?
+# support for NoPrompt allows non-interactive use of this script
+no_prompt=0
 
-# RESULT will be 3 if there are no instances of module to remove
-# however we still need to remove the files or the install script
-# will complain.
-if [[ ("$RESULT" = "0")||("$RESULT" = "3") ]]
+# get the options
+for ((;$#;)) do
+    case $1 in
+      NoPrompt)
+        no_prompt=1 ;;
+      -h|--help|*)
+        cat <<- EndOfHelp
+		Usage: $0 [NoPrompt]
+		       $0 --help
+		    NoPrompt - noninteractive mode
+		    -h|--help - Show help
+		EndOfHelp
+        [[ $1 = -h || $1 = --help ]] # don't use non-zero exit status when help requested
+        exit
+        ;;
+    esac
+    shift
+done
+
+ok_if_status_is() {
+    local s=$? x
+    for x do (( s==x )) && return 0 ; done
+    return "$s"
+}
+
+printf 'Starting removal...\n'
+
+dkms remove -m "$drv_name" -v "$drv_version" --all ||
+ ok_if_status_is 3 || {     # $? == 3 means there are no instances of this
+                            # module to remove, so don't treat this as an
+                            # error.
+    status=$?
+    printf 'An error occurred. dkms remove error = %d\n' "$status"
+    printf 'Please report this error.\n'
+    exit "$status"
+}
+
+printf 'Deleting options and blacklist files from /etc/modprobe.d\n'
+rm -fv "/etc/modprobe.d/$options_file" "/etc/modprobe.d/$blacklist_file"
+
+printf 'Deleting source files from %s\n' "/usr/src/$drv_name-$drv_version"
+rm -rf "/usr/src/$drv_name-$drv_version"
+
+printf 'The driver was removed successfully.\n'
+printf 'You may now delete the driver directory if desired.\n'
+
+if (( ! no_prompt ))
 then
-	echo "Deleting ${OPTIONS_FILE} from /etc/modprobe.d"
-	rm -f /etc/modprobe.d/${OPTIONS_FILE}
-	echo "Deleting ${BLACKLIST_FILE} from /etc/modprobe.d"
-	rm -f /etc/modprobe.d/${BLACKLIST_FILE}
-	echo "Deleting source files from /usr/src/${DRV_NAME}-${DRV_VERSION}"
-	rm -rf /usr/src/${DRV_NAME}-${DRV_VERSION}
-	echo "The driver was removed successfully."
-	echo "You may now delete the driver directory if desired."
-else
-	echo "An error occurred. dkms remove error = ${RESULT}"
-	echo "Please report this error."
-	exit $RESULT
-fi
-
-if [ $NO_PROMPT -ne 1 ]
-then
-	read -p "Do you want to reboot now? (recommended) [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		reboot
-	fi
+    read -p 'Do you want to reboot now? (recommended) [y/N] ' -n 1 -r || exit
+    printf '\n'
+    if [[ $REPLY = [Yy] ]]
+    then
+        reboot
+    fi
 fi
 
 exit 0
diff --git a/save-log.sh b/save-log.sh
index 4957198..e0e0553 100755
--- a/save-log.sh
+++ b/save-log.sh
@@ -1,7 +1,5 @@
 #!/bin/bash
 #
-SCRIPT_NAME="save-log.sh"
-#
 # Purpose: Save a log file with RTW lines only.
 #
 # To make this file executable:
@@ -12,23 +10,25 @@ SCRIPT_NAME="save-log.sh"
 #
 # $ sudo ./edit-options.sh
 #
-if [[ $EUID -ne 0 ]]; then
-	echo "You must run this script with superuser (root) privileges."
-	echo "Try: \"sudo ./${SCRIPT_NAME}\""
-	exit 1
+
+if (( EUID != 0 )); then
+    printf 'You must run this script with superuser (root) privileges.\n'
+    printf 'Try: "sudo %s"\n' "${*:0}"
+    exit 1
 fi
 
 # Deletes existing log
 rm -f -- rtw.log
 
-dmesg | cut -d"]" -f2- | grep "RTW" >> rtw.log
-RESULT=$?
+dmesg |
+ cut -d ']' -f2- |
+  grep RTW >> rtw.log || {
+    status=$?
 
-if [[ "$RESULT" != "0" ]]; then
-	echo "An error occurred while running: ${SCRIPT_NAME}"
-	echo "Did you set a log level > 0 ?"
-	exit 1
-else
-	echo "rtw.log saved successfully."
-	exit 0
-fi
+    printf 'An error occurred while running: %s\n' "${0##*}"
+    printf 'Did you set a log level > 0 ?\n'
+    exit "$status"
+}
+
+printf 'rtw.log saved successfully.\n'
+exit 0
diff --git a/start-mon.sh b/start-mon.sh
index 4977d36..d5ab742 100755
--- a/start-mon.sh
+++ b/start-mon.sh
@@ -1,304 +1,261 @@
 #!/bin/bash
 
-SCRIPT_NAME="start-mon.sh"
-SCRIPT_VERSION="20220408"
-
+SCRIPT_VERSION=20220923
 
 # Purpose: Start and configure monitor mode on the provided interface
 
 # Usage: $ sudo ./start-mon.sh [interface:wlan0]
 
+# There is no filename globbing in this script, so disable it to stop accidents
+set -f
 
 clear
 
-
 # Check that sudo was used to start the script
-if [[ $EUID -ne 0 ]]
+if (( EUID != 0 ))
 then
-	echo
-	echo " ERROR: You must run this script with superuser (root) privileges."
-	echo -e " Try: sudo ./${SCRIPT_NAME} [interface:wlan0]"
-	echo
-	exit 1
+    printf '\n ERROR: You must run this script with superuser (root) privileges.\n'
+    printf ' Try: "sudo %s"\n\n' "${*:0}"
+    exit 1
 fi
 
-
 # Add code to check if iw and ip are installed
 
-
 # Ensure WiFi radio is not blocked
 sudo rfkill unblock wlan
 
-
 # Assign default monitor mode interface name
-iface0mon='wlan0mon'
-
+iface0mon=wlan0mon
 
 # Assign default channel
 chan=6
 
-
 # Activate option to set automatic (1) or manual (2) interface mode
 #
 # Option 1: if you only have one wlan interface (automatic detection)
-#iface0=`iw dev | grep 'Interface' | sed 's/Interface //'`
+# iface0=$( iw dev |
+#           sed -e '/^[[:space:]]*Interface[[:space:]]*/! d' -e 's///' )
 #
 # Option 2: if you have more than one wlan interface (default wlan0)
 iface0=${1:-wlan0}
 
+get_if_info() {
+    local iface=$1 ii ij
 
-# Set iface0 down
-ip link set dev $iface0 down
-# Check if iface0 exists and continue if true
-if [ $? -eq 0 ]
+    # shellcheck ignore=SC1007
+    iface_name= iface_type= iface_addr= iface_chan= iface_txpw= iface_state=
+
+    ii=$( iw dev "$iface" info | tr -s ' \t\\\n\r' ' ' )
+    ij=${ii#*' Interface '} ; [[ $ij = "$ii" ]] || iface_name=${ij%%' '*}
+    ij=${ii#*' addr '}      ; [[ $ij = "$ii" ]] || iface_type=${ij%%' '*}
+    ij=${ii#*' type '}      ; [[ $ij = "$ii" ]] || iface_addr=${ij%%' '*}
+    ij=${ii#*' channel '}   ; [[ $ij = "$ii" ]] || iface_chan=${ij%%' '*}
+    ij=${ii#*' txpower '}   ; [[ $ij = "$ii" ]] || ij=${ij%%' '*} iface_txpw=${ij%dBm}
+
+    ij=' '$( ip addr show "$iface" | tr -s ' \t\\\n\r' ' ' )
+    ij=${ii#*' state '}     ; [[ $ij = "$ii" ]] || iface_state=${ij%%' '*}
+}
+
+print_if_info() {
+    local iface=$1 m n
+
+    clear
+    printf '\n --------------------------------\n'
+    printf '    %-20s %s\n' "${0##*/}" "$SCRIPT_VERSION"
+    printf ' --------------------------------\n'
+    printf '    WiFi Interface:\n'
+    printf '             %s\n' "$iface"
+    printf ' --------------------------------\n'
+    for m in name type state addr chan txpw
+    do
+        n=iface_$m ; n=${!n} ;
+        [[ -n $n ]] && printf '    %-5.5s -  %s\n' "$m" "$n"
+    done
+    printf ' --------------------------------\n\n'
+}
+
+# str_join
+#   $1      name of output variable
+#   $2      joiner
+#   $3...   words to be joined
+# puts $3$2$4$2$5$2$6$2$7... into variable $1
+
+str_join() { local IFS="$2" ; printf -v "$1" %s "${*:3}" ; }
+
+# Set $iface0 down
+ip link set dev "$iface0" down || {
+    clear
+    printf '\n ERROR: Please provide an existing interface as parameter!\n'
+    printf ' Usage: $ sudo %s [interface:wlan0]\n' "$0"
+    printf ' Tip:   $ iw dev\n\n'
+    exit 1
+}
+
+#Suspend interfering processes
+ProcNames=(
+    autoipd
+    avahi
+    avahi
+    client
+    daemon
+    daemon
+    dhcdbd
+    dhclient
+    dhcpcd
+    ifplugd
+    iwd
+    knetworkmanager
+    net_applet
+    NetworkManager
+    udhcpc
+    wicd
+    wicd
+    wifibox
+    wlassistant
+    wpa_action
+    wpa_cli
+    wpa_supplicant
+)
+
+IFS=$' \t\n'
+pids=( $(
+          # pgrep takes a RegEx pattern, which can be a pipe-separated list of alternatives
+          str_join ProcPattern '|' "${ProcNames[@]}"
+          pgrep -x "$ProcPattern"
+        ) )   # split output on any whitespace
+if  (( ${#pids[@]} > 0 ))
 then
-#	Disable interfering processes
-	PROCESSES="wpa_action\|wpa_supplicant\|wpa_cli\|dhclient\|ifplugd\|dhcdbd\|dhcpcd\|udhcpc\|NetworkManager\|knetworkmanager\|avahi-autoipd\|avahi-daemon\|wlassistant\|wifibox\|net_applet\|wicd-daemon\|wicd-client\|iwd"
-	unset match
-	match="$(ps -A -o comm= | grep ${PROCESSES} | grep -v grep | wc -l)"
-	badProcs=$(ps -A -o pid=PID -o comm=Name | grep "${PROCESSES}\|PID")
-	for pid in $(ps -A -o pid= -o comm= | grep ${PROCESSES} | awk '{print $1}'); do
-		command kill -19 "${pid}"   # -19 = STOP
-	done
-	clear
-	echo
-	echo ' The following processes have been stopped:'
-	echo
-	echo "${badProcs}"
-	echo
-	echo ' Note: The above processes can be returned'
-	echo ' to a normal state at the end of this script.'
-	echo
-	read -p " Press any key to continue... " -n 1 -r
-	
 
-#	Display interface settings
-	clear
-	echo
-	echo ' --------------------------------'
-	echo -e "    ${SCRIPT_NAME} ${SCRIPT_VERSION}"
-	echo ' --------------------------------'
-	echo '    WiFi Interface:'
-	echo '             '$iface0
-	echo ' --------------------------------'
-	iface_name=$(iw dev $iface0 info | grep 'Interface' | sed 's/Interface //' | sed -e 's/^[ \t]*//')
-	echo '    name  - ' $iface_name
-	iface_type=$(iw dev $iface0 info | grep 'type' | sed 's/type //' | sed -e 's/^[ \t]*//')
-	echo '    type  - ' $iface_type
-	iface_state=$(ip addr show $iface0 | grep 'state' | sed 's/.*state \([^ ]*\)[ ]*.*/\1/')
-	echo '    state - ' $iface_state
-	iface_addr=$(iw dev $iface0 info | grep 'addr' | sed 's/addr //' | sed -e 's/^[ \t]*//')
-	echo '    addr  - ' $iface_addr
-	echo ' --------------------------------'
-	echo
+    kill -STOP "${pids[@]}"
 
+    clear
+    printf '\n The following processes have been stopped:\n\n'
 
-#	Set addr (has to be done before renaming the interface)
-	iface_addr_orig=$iface_addr
-	read -p " Do you want to set a new addr? [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		read -p " What addr do you want? ( e.g. 12:34:56:78:90:ab ) " iface_addr
-#		need code to ID bad addresses
-		ip link set dev $iface0 address $iface_addr
-	fi
+    # ps -p takes a comma-separated list
+    str_join pidlist ',' "${pids[@]}"
+    # pidlist is defined by str_join
+    # shellcheck disable=SC2154
+    ps -o pid=PID,state=State,comm=Name -p "$pidlist"
 
+    printf '\n (state T means stopped)\n\n'
+    printf ' Note: The above processes can be returned\n'
+    printf ' to a normal state at the end of this script.\n\n'
 
-#	Set monitor mode
-#	iw dev <devname> set monitor <flag>
-#		Valid monitor flags are:
-#		none:     no special flags
-#		fcsfail:  show frames with FCS errors
-#		control:  show control frames
-#		otherbss: show frames from other BSSes
-#		cook:     use cooked mode
-#		active:   use active mode (ACK incoming unicast packets)
-#		mumimo-groupid <GROUP_ID>: use MUMIMO according to a group id
-#		mumimo-follow-mac <MAC_ADDRESS>: use MUMIMO according to a MAC address
-	iw dev $iface0 set monitor none
-
-
-#	Rename interface
-	ip link set dev $iface0 name $iface0mon
-
-
-#	Bring the interface up
-	ip link set dev $iface0mon up
-	
-
-#	Display interface settings
-	clear
-	echo
-	echo ' --------------------------------'
-	echo -e "    ${SCRIPT_NAME} ${SCRIPT_VERSION}"
-	echo ' --------------------------------'
-	echo '    WiFi Interface:'
-	echo '             '$iface0
-	echo ' --------------------------------'
-	iface_name=$(iw dev $iface0mon info | grep 'Interface' | sed 's/Interface //' | sed -e 's/^[ \t]*//')
-	echo '    name  - ' $iface_name
-	iface_type=$(iw dev $iface0mon info | grep 'type' | sed 's/type //' | sed -e 's/^[ \t]*//')
-	echo '    type  - ' $iface_type
-	iface_state=$(ip addr show $iface0mon | grep 'state' | sed 's/.*state \([^ ]*\)[ ]*.*/\1/')
-	echo '    state - ' $iface_state
-	iface_addr=$(iw dev $iface0mon info | grep 'addr' | sed 's/addr //' | sed -e 's/^[ \t]*//')
-	echo '    addr  - ' $iface_addr
-	echo ' --------------------------------'
-	echo
-
-
-#	Set channel
-	read -p " Do you want to set the channel? [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		read -p " What channel do you want to set? " chan
-#		Documentation:
-#		iw dev <devname> set channel <channel> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
-#		iw dev <devname> set freq <freq> [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
-#		iw dev <devname> set freq <control freq> [5|10|20|40|80|80+80|160] [<center1_freq> [<center2_freq>]]
-#		Select one or modify as required:
-		iw dev $iface0mon set channel $chan
-#		iw dev $iface0mon set channel $chan HT40-		
-#		iw dev $iface0mon set channel $chan 80MHz
-#		To test if channel was set correctly:
-#		aireplay-ng --test <wlan0>
-	fi
-
-
-#	Display interface settings
-	clear
-	echo
-	echo ' --------------------------------'
-	echo -e "    ${SCRIPT_NAME} ${SCRIPT_VERSION}"
-	echo ' --------------------------------'
-	echo '    WiFi Interface:'
-	echo '             '$iface0
-	echo ' --------------------------------'
-	iface_name=$(iw dev $iface0mon info | grep 'Interface' | sed 's/Interface //' | sed -e 's/^[ \t]*//')
-	echo '    name  - ' $iface_name
-	iface_type=$(iw dev $iface0mon info | grep 'type' | sed 's/type //' | sed -e 's/^[ \t]*//')
-	echo '    type  - ' $iface_type
-	iface_state=$(ip addr show $iface0mon | grep 'state' | sed 's/.*state \([^ ]*\)[ ]*.*/\1/')
-	echo '    state - ' $iface_state
-	iface_addr=$(iw dev $iface0mon info | grep 'addr' | sed 's/addr //' | sed -e 's/^[ \t]*//')
-	echo '    addr  - ' $iface_addr
-	iface_chan=$(iw dev $iface0mon info | grep 'channel' | sed 's/channel //' | sed -e 's/^[ \t]*//')
-	echo '    chan  - ' $chan
-	iface_txpw=$(iw dev $iface0mon info | grep 'txpower' | sed 's/txpower //' | sed -e 's/^[ \t]*//')
-	echo '    txpw  - ' $iface_txpw
-	echo ' --------------------------------'
-	echo
-
-
-#	Set txpw
-	read -p " Do you want to set the txpower? [y/N] " -n 1 -r
-	echo
-	if [[ $REPLY =~ ^[Yy]$ ]]
-	then
-		echo " Note: Some USB WiFi adapters will not allow the txpw to be set."
-		read -p " What txpw setting do you want to attempt to set? ( e.g. 2300 = 23 dBm ) " iface_txpw
-		iw dev $iface0mon set txpower fixed $iface_txpw
-	fi
-
-
-#	Display interface settings
-	clear
-	echo
-	echo ' --------------------------------'
-	echo -e "    ${SCRIPT_NAME} ${SCRIPT_VERSION}"
-	echo ' --------------------------------'
-	echo '    WiFi Interface:'
-	echo '             '$iface0
-	echo ' --------------------------------'
-	iface_name=$(iw dev $iface0mon info | grep 'Interface' | sed 's/Interface //' | sed -e 's/^[ \t]*//')
-	echo '    name  - ' $iface_name
-	iface_type=$(iw dev $iface0mon info | grep 'type' | sed 's/type //' | sed -e 's/^[ \t]*//')
-	echo '    type  - ' $iface_type
-	iface_state=$(ip addr show $iface0mon | grep 'state' | sed 's/.*state \([^ ]*\)[ ]*.*/\1/')
-	echo '    state - ' $iface_state
-	iface_addr=$(iw dev $iface0mon info | grep 'addr' | sed 's/addr //' | sed -e 's/^[ \t]*//')
-	echo '    addr  - ' $iface_addr
-	iface_chan=$(iw dev $iface0mon info | grep 'channel' | sed 's/channel //' | sed -e 's/^[ \t]*//')
-	echo '    chan  - ' $chan
-	iface_txpw=$(iw dev $iface0mon info | grep 'txpower' | sed 's/txpower //' | sed -e 's/^[ \t]*//')
-	echo '    txpw  - ' $iface_txpw
-	echo ' --------------------------------'
-	echo
-
-
-#	Interface ready
-	echo " The Interface is now ready for Monitor Mode use."
-	echo
-	echo " You can place this terminal in the background"
-	echo " while you run any applications you wish to run."
-	echo
-	read -p " Press any key to continue... " -n 1 -r
-	echo
-
-
-#	Return the adapter to original settings or not
-	read -p " Do you want to return the adapter to original settings? [Y/n] " -n 1 -r
-	if [[ $REPLY =~ ^[Nn]$ ]]
-	then
-#		Display interface settings
-		clear
-		echo
-		echo ' --------------------------------'
-		echo -e "    ${SCRIPT_NAME} ${SCRIPT_VERSION}"
-		echo ' --------------------------------'
-		echo '    WiFi Interface:'
-		echo '             '$iface0
-		echo ' --------------------------------'
-		iface_name=$(iw dev $iface0mon info | grep 'Interface' | sed 's/Interface //' | sed -e 's/^[ \t]*//')
-		echo '    name  - ' $iface_name
-		iface_type=$(iw dev $iface0mon info | grep 'type' | sed 's/type //' | sed -e 's/^[ \t]*//')
-		echo '    type  - ' $iface_type
-		iface_state=$(ip addr show $iface0mon | grep 'state' | sed 's/.*state \([^ ]*\)[ ]*.*/\1/')
-		echo '    state - ' $iface_state
-		iface_addr=$(iw dev $iface0mon info | grep 'addr' | sed 's/addr //' | sed -e 's/^[ \t]*//')
-		echo '    addr  - ' $iface_addr
-		echo ' --------------------------------'
-		echo
-		exit 0
-	else
-		ip link set dev $iface0mon down
-		ip link set dev $iface0mon address $iface_addr_orig
-		iw $iface0mon set type managed
-		ip link set dev $iface0mon name $iface0
-		ip link set dev $iface0 up
-#		Enable interfering processes
-		for pid in $(ps -A -o pid= -o comm= | grep ${PROCESSES} | awk '{print $1}'); do
-			command kill -18 "${pid}"   # -18 = CONT
-		done
-#		Display interface settings
-		clear
-		echo
-		echo ' --------------------------------'
-		echo -e "    ${SCRIPT_NAME} ${SCRIPT_VERSION}"
-		echo ' --------------------------------'
-		echo '    WiFi Interface:'
-		echo '             '$iface0
-		echo ' --------------------------------'
-		iface_name=$(iw dev $iface0 info | grep 'Interface' | sed 's/Interface //' | sed -e 's/^[ \t]*//')
-		echo '    name  - ' $iface_name
-		iface_type=$(iw dev $iface0 info | grep 'type' | sed 's/type //' | sed -e 's/^[ \t]*//')
-		echo '    type  - ' $iface_type
-		iface_state=$(ip addr show $iface0 | grep 'state' | sed 's/.*state \([^ ]*\)[ ]*.*/\1/')
-		echo '    state - ' $iface_state
-		iface_addr=$(iw dev $iface0 info | grep 'addr' | sed 's/addr //' | sed -e 's/^[ \t]*//')
-		echo '    addr  - ' $iface_addr
-		echo ' --------------------------------'
-		echo
-		exit 0
-	fi
 else
-	clear
-	echo
-	echo " ERROR: Please provide an existing interface as parameter!"
-	echo -e " Usage: $ sudo ./$SCRIPT_NAME [interface:wlan0]"
-	echo " Tip:   $ iw dev"
-	echo
-	exit 1
+    clear
+    printf '\n There are no processes that need stopping.\n\n'
 fi
+
+read -p ' Press any key to continue... ' -n 1 -r || exit
+
+# Display interface settings
+get_if_info "$iface0"
+print_if_info "$iface0" 4
+
+# Set addr (has to be done before renaming the interface)
+iface_addr_orig=$iface_addr
+read -p ' Do you want to set a new addr? [y/N] ' -n 1 -r || exit
+printf '\n'
+if [[ $REPLY = [Yy] ]]
+then
+    read -p ' What addr do you want? ( e.g. 12:34:56:78:90:ab ) ' iface_addr || exit
+#   need code to ID bad addresses
+    ip link set dev "$iface0" address "$iface_addr"
+fi
+
+# Set monitor mode
+#iw dev <devname> set monitor <flag>
+#   Valid monitor flags are:
+#   none:     no special flags
+#   fcsfail:  show frames with FCS errors
+#   control:  show control frames
+#   otherbss: show frames from other BSSes
+#   cook:     use cooked mode
+#   active:   use active mode (ACK incoming unicast packets)
+#   mumimo-groupid <GROUP_ID>: use MUMIMO according to a group id
+#   mumimo-follow-mac <MAC_ADDRESS>: use MUMIMO according to a MAC address
+iw dev "$iface0" set monitor none
+
+# Rename interface
+ip link set dev "$iface0" name "$iface0mon"
+
+# Bring the interface up
+ip link set dev "$iface0mon" up
+
+# Display interface settings
+get_if_info "$iface0mon"
+print_if_info "$iface0" 4
+
+# Set channel
+read -p ' Do you want to set the channel? [y/N] ' -n 1 -r || exit
+printf '\n'
+if [[ $REPLY = [Yy] ]]
+then
+    read -p ' What channel do you want to set? ' chan || exit
+# Documentation:
+#   iw dev "$devname" set channel "$channel"   [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
+#   iw dev "$devname" set freq "$freq"         [NOHT|HT20|HT40+|HT40-|5MHz|10MHz|80MHz]
+#   iw dev "$devname" set freq "$control_freq" [5|10|20|40|80|80+80|160] ["$center1_freq" ["$center2_freq"]]
+# Select one or modify as required:
+    iw dev "$iface0mon" set channel "$chan"
+#   iw dev "$iface0mon" set channel "$chan" HT40-
+#   iw dev "$iface0mon" set channel "$chan" 80MHz
+# To test if channel was set correctly:
+#   aireplay-ng --test <wlan0>
+fi
+
+# Display interface settings
+
+get_if_info "$iface0mon"
+print_if_info "$iface0" 6
+
+# Set txpw
+read -p ' Do you want to set the txpower? [y/N] ' -n 1 -r || exit
+printf '\n'
+if [[ $REPLY = [Yy] ]]
+then
+    printf ' Note: Some USB WiFi adapters will not allow the txpw to be set.\n'
+    read -p ' What txpw setting do you want to attempt to set? ( e.g. 2300 = 23 dBm ) ' iface_txpw || exit
+    iw dev "$iface0mon" set txpower fixed "$iface_txpw"
+fi
+
+# Display interface settings
+get_if_info "$iface0mon"
+print_if_info "$iface0" 6
+
+# Interface ready
+printf ' The Interface is now ready for Monitor Mode use.\n\n'
+printf ' You can place this terminal in the background\n'
+printf ' while you run any applications you wish to run.\n\n'
+read -p ' Press any key to continue... ' -n 1 -r || exit
+printf '\n'
+
+# Return the adapter to original settings or not
+read -p ' Do you want to return the adapter to original settings? [Y/n] ' -n 1 -r || exit
+if [[ $REPLY = [Nn] ]]
+then
+#   Display interface settings
+    get_if_info "$iface0mon"
+    print_if_info "$iface0" 4
+else
+    ip link set dev "$iface0mon" down
+    ip link set dev "$iface0mon" address "$iface_addr_orig"
+    iw "$iface0mon" set type managed
+    ip link set dev "$iface0mon" name "$iface0"
+    ip link set dev "$iface0" up
+#   Display interface settings
+    get_if_info "$iface0"
+    print_if_info "$iface0" 4
+fi
+
+if (( ${#pids[@]} > 0 ))
+then
+    read -p ' Do you want to resume the stopped processes? [Y/n] ' -n 1 -r || exit
+    if [[ $REPLY = [Yy] ]]
+    then
+        # Enable interfering processes
+        kill -CONT "${pids[@]}"
+    fi
+fi
+
+exit 0