So i want to display the filename and the size of the file in MB using the "du" command in my bash script but it outputs the filepath for the file

I have used the command:

du -s -BM /home/user/test/test_file_check

But my output is:

0M      /home/user/test/test_file_check

How do i get rid of the /home/user/test path from the output? Would it be possible to use sed to remove the filepath?

Is there alternatively another command better suited for this?

CodePudding user response：

Since sed does greedy matching by default:

du -s -BM /home/user/test/test_file_check | sed 's|/.*/||'

sed is going to match the longest line that matches /.*/ (ie, greedy match) and then replace it with nothing (||). NOTE: since the data includes the / character we need a different script delimiter hence the use of | as the sed script delimiter

Simulating your du output:

$ echo '0M      /home/user/test/test_file_check' | sed 's|/.*/||'
0M      test_file_check

CodePudding user response：

A slightly tongue in cheek approach. This navigates to the directory and does the du in the local directory, then navigates back to the previous location.

cd /home/user/test/ && du -s -BM test_file_check && cd - > /dev/null || return
0M      test_file_check