Bash Bash Parameter Expansion Parameter expansion and filenames
Example
You can use Bash Parameter Expansion to emulate common filename-processing operations like basename and dirname.
We will use this as our example path:
FILENAME="/tmp/example/myfile.txt"
To emulate dirname and return the directory name of a file path:
echo "${FILENAME%/*}"
#Out: /tmp/example
To emulate basename $FILENAME and return the filename of a file path:
echo "${FILENAME##*/}"
#Out: myfile.txt
To emulate basename $FILENAME .txt and return the filename without the .txt. extension:
BASENAME="${FILENAME##*/}"
echo "${BASENAME%%.txt}"
#Out: myfile
