Protecting files with noclobber
To protect files on Linux by accidently overwritten by > operator, you can use
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set -o noclobber |
Now if you try to overwrite a file with >, you will get error
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root@ok:~# echo "Hello" > 1.txt -bash: 1.txt: cannot overwrite existing file root@ok:~# |
If you really need to overwrite, use >! operator.
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echo "Hello" >! FILE_NAME |
Example
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root@ok:~# echo "Hello" > 1.txt -bash: 1.txt: cannot overwrite existing file root@ok:~# echo "Hello" >! 1.txt root@ok:~# |
Instead of running the command “set -o noclobber” everytime, you can add it to .bashrc file.