basename - strip directory and suffix from filenames.
Display the filename:
basename /var/log/messages
Display the filename of multiple files:
basename -a /var/log/messages /var/log/dmesg
Display the filename of multiple files without newline break:
basename -az /var/log/messages /var/log/dmesg
Display the filename without extension:
basename -s .jpg /home/user/pictures/wallpaper.jpg