ruby 1:2.5.1 / usr / share / man / man1 / irb.1.gz

/usr/share/man/man1/irb.1.gz is in ruby 1:2.5.1.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/share/man/man1/irb2.5.1.gz