man -> tldr

http://tldr.sh/
Demo: https://tldr.ostera.io/tar

$ man tar
tar [-] A --catenate --concatenate | c --create | d --diff --compare |
--delete | r --append | t --list | --test-label | u --update | x
--extract --get [options] [pathname ...]

DESCRIPTION
Tar stores and extracts files from a tape or disk archive.

The first argument to tar should be a function; either one of the letters
Acdrtux, or one of the long function names. A function letter need not
be prefixed with ``-'', and may be combined with other single-letter
options. A long function name must be prefixed with --. Some options
take a parameter; with the single-letter form these must be given as sep-
arate arguments. With the long form, they may be given by appending
=value to the option.
[...]

$ tldr tar
Archiving utility. Often combined with a compression method, such as gzip or bzip.

Create an archive from files:
tar cf {{target.tar}} {{file1 file2 file3}}

Create a gzipped archive:
tar czf {{target.tar.gz}} {{file1 file2 file3}}

Extract an archive in a target folder:
tar xf {{source.tar}} -C {{folder}}

Extract a gzipped archive in the current directory:
tar xzf {{source.tar.gz}}

Extract a bzipped archive in the current directory:
tar xjf {{source.tar.bz2}}

Create a compressed archive, using archive suffix to determine the compression program:
tar caf {{target.tar.xz}} {{file1 file2 file3}}

List the contents of a tar file:
tar tvf {{source.tar}}

via https://thenextweb.com/dd/2017/11/24/tldr-linux-man-pages-always/