Bash Scripting Random Numbers

I needed to create a script that would pick a random line from a file.  The $RANDOM variable isn’t the easiest to use as it generates a psuedo random number between 0 – 32767 only.

The shuf command which I hadn’t heard of before makes this much easier.  To pick a random number between 0 and 5 you would use.

The -i option selects the range and the -n is how many numbers to output.

To assign the contents of line number X in a file to a variable I used this code;

I assign the random number to a variable in the first line then use sed to get that line number from the file.

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