Google is the best search engine ever. However, that doesn’t mean that it’s the right tool for all jobs.
OK, fine—we can do better than that:
Great! That worked! Or … did it?
There are many versions of Linux. When you Google “linux cat”,
which version of
cat does it tell you about?
% man cat CAT(1) User Commands CAT(1) NAME cat - concatenate files and print on the standard output SYNOPSIS cat [OPTION]... [FILE]... DESCRIPTION Concatenate FILE(s), or standard input, to standard output. -A, --show-all equivalent to -vET -b, --number-nonblank number nonempty output lines, overrides -n -e equivalent to -vE -E, --show-ends display $ at end of each line -n, --number number all output lines -s, --squeeze-blank suppress repeated empty output lines -t equivalent to -vT -T, --show-tabs display TAB characters as ^I -u (ignored) -v, --show-nonprinting use ^ and M- notation, except for LFD and TAB --help display this help and exit --version output version information and exit With no FILE, or when FILE is -, read standard input. EXAMPLES cat f - g Output f's contents, then standard input, then g's contents. cat Copy standard input to standard output. GNU coreutils online help: <http://www.gnu.org/software/coreutils/> Report cat translation bugs to <http://translationproject.org/team/> AUTHOR Written by Torbjorn Granlund and Richard M. Stallman. COPYRIGHT Copyright (C) 2013 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>. This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law. SEE ALSO tac(1) The full documentation for cat is maintained as a Texinfo manual. If the info and cat programs are properly installed at your site, the com- mand info coreutils 'cat invocation' should give you access to the complete manual. GNU coreutils 8.22 June 2018 CAT(1)
A better solution is to use the
man command, from a terminal,
to tell you about the version of
cat that’s installed.
% is my prompt.)