Shell Script to Convert a File to Lowercase

shell script is a computer program designed to be run by the Unix shell, a command-line interpreter. The various dialects of shell scripts are considered to be scripting languages. Typical operations performed by shell scripts include file manipulation, program execution, and printing text. A script that sets up the environment, runs the program, and does any necessary cleanup, logging, etc. is called a wrapper.

In this post, we will write a shell script to accept a file name as input and translate the contents of that file in lowercase.

INPUT:
line 1: filename

OUTPUT:
none

The following is the shell script to accept a file name as input and translate the contents of that file in lowercase:

echo Enter file name
read file
a=`cat $file`
echo $a | tr '[:upper:]' '[:lower:]' > $file

OUTPUT:

$ Enter file name
$ test

Let us know in the comments if you are having any questions regarding this shell script.

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Jazib
Android Developer | Competitive Programmer

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