How to compare two directories with the diff command under Linux?

Under Linux, one can compare the content of two folder with the diff command:

diff -qr folder_1/ folder_2/

The -q (brief) option displays only differences (prevent similar files to be displayed).

The -r (recursive) option also compare sub-folders.

By removing the q option, you can have a file-by-file breakdown of the difference between the two files:

diff -r dossier1 dossier2 | sort

Under Linux, one can compare the content of two folder with the diff command:

diff -qr folder_1/ folder_2/

The -q (brief) option displays only differences (prevent similar files to be displayed).

The -r (recursive) option also compare sub-folders.