Add an exists subcommand to podman container and podman image that allows
users to verify the existence of a container or image by ID or name. The return
code can be 0 (success), 1 (failed to find), or 125 (failed to work with runtime).
Issue #1845
Signed-off-by: baude <bbaude@redhat.com>
man-pages(7) has [1]:
> For commands, this shows the syntax of the command and its arguments
> (including options); boldface is used for as-is text and italics are
> used to indicate replaceable arguments. Brackets ([]) surround
> optional arguments, vertical bars (|) separate choices, and ellipses
> (...) can be repeated.
I've adjusted our SYNOPSIS entries to match that formatting, and
generally tried to make them more consistent with the precedent set by
the man-pages project. Outside of the SYNOPSIS entry, I prefer using
backticks for literals, although in some places I've left the **
bolding to keep things visually similar to a nearby SYNOPSIS entry.
[1]: http://man7.org/linux/man-pages/man7/man-pages.7.html
Signed-off-by: W. Trevor King <wking@tremily.us>
Closes: #1027
Approved by: rhatdan
