CT320: Network and System Administration
Fall 2018
Google is the best search engine ever. However, that doesn’t mean that it’s the right tool for all jobs.
Try Googling:
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% 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) to standard output. With no FILE, or when FILE is -, read standard input. -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 EXAMPLES cat f - g Output f's contents, then standard input, then g's contents. cat Copy standard input to standard output. AUTHOR Written by Torbjorn Granlund and Richard M. Stallman. REPORTING BUGS GNU coreutils online help: <https://www.gnu.org/software/coreutils/> Report cat translation bugs to <https://translationproject.org/team/> COPYRIGHT Copyright © 2018 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <https://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) Full documentation at: <https://www.gnu.org/software/coreutils/cat> or available locally via: info '(coreutils) cat invocation' GNU coreutils 8.30 July 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.)
