+ nifty scripts

used for tux setup. might come in handy here as well.

scripts/990_key_value_modifier.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/bash
+
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+# what:        modify single value in a config file
+# author:      klevstul
+# started:     mar 2021
+#
+# requires:    n/a
+# - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
+
+if [ "$EUID" -eq 0 ]
+  then echo "error: do not run as 'root'"
+  exit
+fi
+
+this_file_name=`basename "$0"`
+if [ $# -ne 4 ]; then
+    echo "usage: '$this_file_name [TARGET_KEY] [REPLACEMENT_VALUE] [KEY_VALUE_SEPARATOR] [CONFIG_FILE]'"
+    exit 1
+fi
+
+target_key=$1
+replacement_value=$2
+key_value_separator=$3
+config_file=$4
+
+# https://stackoverflow.com/questions/2464760/modify-config-file-using-bash-script
+sed -i "s/\($target_key*$key_value_separator*\).*/\1$replacement_value/" $config_file