Bash script for diagnosing problems with running software inside of terminal

[null_reflections]

This script is actually kinda unnecessary on a linux system because you just have to try running a program through the terminal in order to figure out that you haven't installed it:

kerblunk
kerblunk: command not found

However, if you are looking for more information, then this script might be able to lead you figuring out problems sooner:

#!/bin/bash
#script idea: tell user if a file is executable or is included in path

SCRIPT=$0

#instructions
if [ $# -lt 1 ]; then
        echo "Usage:${SCRIPT##*/} [program-name]"
fi

#creates file listing path directories
echo $PATH | awk 'BEGIN {RS=":"} {print}' | sed '/^$/d' > path-dirs

#loops through directories and tells user if file exists but is not executable
while read -r line; do
    if [ -f "$line/$1" ] && ! [ -x "$line/$1" ]; then
                echo "$1 is in \$PATH but is NOT executable"
                echo "Location: $line"
                exit 0
        fi
done < path-dirs

#tells user program is ready to use
while read -r line; do
    if [ -x "$line/$1" ]; then
                echo "$line/$1 is in \$PATH and is executable"
                echo "Location: $line"
                exit 0
        fi
done < path-dirs

#clean-up
rm path-dirs

#program does is not in path
echo "$1 does not exist in \$PATH"

I used the "while read" concept here, but "readarray" is potentially better and less deprecated.