ca.1s

No standard syntax available.
Example if custom: ca [options] [args]

The 'ca.1s' reference does not match any standard Linux command or man page in common distributions (e.g., Ubuntu, Fedora, Arch). Man page section 1s is non-standard; section 1 is for user commands, while 1s appears in niche setups like Slackware for local scripts or extensions.

No core functionality, options, or documentation found in standard repositories (coreutils, util-linux, etc.). It may be a custom script, distro-specific tool (possibly related to certificates or admin utils), or a typo for cal(1) (calendar) or cat(1) (concatenate files).

Verify locally with 'man -k ca' or 'approx' search. If custom, check package managers like apt/rpm for 'ca' binaries.