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how to manipulate the filename using shell scripts

 2 years ago
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how to manipulate the filename using shell scripts

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My source file is located in /user/public/test.txt

The file test.txt should be modified to user_test.txt and copied to /home/home/user_test.txt

An alternative interpretation of the question:

file=/usr/public/test.txt
base=user_$(basename $file)
dirn=$(dirname $file)

mv $file $dirn/$base
cp $dirn/$base /home/home/$base

Since you stipulate bash, the portable code above can use:

file=/usr/public/test.txt
base=user_${file##*/}
dirn=${file%/*}

mv $file $dirn/$base
cp $dirn/$base /home/home/$base

The code takes liberties because it notes that there are no spaces or newlines or other special characters in the file names. If you have to deal with those, you have to be a lot more careful (liberal) with the use of double quotes.

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