How to extract filename and extension separately in bash

This example will show you how to extract filename and extension separately in the bash.

Extracting file name without extension

fullfile="fun/ss/log.txt"
filename=$(basename -- "$fullfile")
filename="${filename%.*}"
echo $filename

# log

In the above code first, we have used basename command to get basename which looks like this log.txt on the next line, we have used %.* to get the file name without extension.

Extracting extension without filename

fullfile="fun/ss/log.txt"
filename=$(basename -- "$fullfile")
extension="${filename##*.}"
echo $extension

Output:

.txt

Second way

You can also try the following syntax to get the filename without extension.

fullfile="fun/ss/log.txt"
filename=$(basename $fullfile .txt)
echo $filename

Output:

log