Extract filename and extension in Bash

First, get file name without the path:

filename=$(basename -- "$fullfile")extension="${filename##*.}"filename="${filename%.*}"

Alternatively, you can focus on the last '/' of the path instead of the '.' which should work even if you have unpredictable file extensions:

filename="${fullfile##*/}"

You may want to check the documentation :

bash string filenames

~% FILE="example.tar.gz"~% echo "${FILE%%.*}"example~% echo "${FILE%.*}"example.tar~% echo "${FILE#*.}"tar.gz~% echo "${FILE##*.}"gz

For more details, see shell parameter expansion in the Bash manual.

bash string filenames

Usually you already know the extension, so you might wish to use:

basename filename .extension

for example:

basename /path/to/dir/filename.txt .txt

and we get

filename

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