Shell Scripts

This page contains some of the shell scripts and some of the shell utils that are useful in regular work.

How to keep files safe from accidental overwriting with noclobber under BASH shell?

This happens many a times, user may accidentally use '>' operator and override original file. Or sometimes you may use '>' instead of '>>'. In such a cases, user can use noclobber to ask before doing any action.

Set noclobber:

Now redirect some result to an already existing file called as "temp"

Then bash will give an error message saying:

Rather than setting each time use the below statement to place permenantly the noclobber setting statement as below:

Unset noclobber

Temporarily turn off noclobber

The above command will allow user to overwrite the existing "temp" file.
">|" operator is used to force the file to be overwritten.

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