Explore about environment variables?
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Is shell scripting easy to learn?
What is the use of echo in shell script?
How to customise the existing shell?
I want to read all input to the command from file1 direct all output to file2 and error to file 3, how can I achieve this?
Write a shell script that adds two numbers if provided as the command line argument and if the two numbers are not entered throws an error message.
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