$ cd /usr/bin $ file * | grep script a2ping: perl script text executable aalib-config: POSIX shell script text executable aclocal-1.9: perl script text executable allcm: POSIX shell script text executable allneeded: POSIX shell script text executable annotate-output: Bourne-Again shell script text executable anytopnm: POSIX shell script text executable apport-cli: python script text executable apport-unpack: python script text executable apt-file: perl script text executable [ ... ]