I was trying to look for encryption commands with apropos:
apropos encrypt
A lot of them don't work, for example: gpgsm, setkey, passwd2des etc. When I type them I just get:
bash: command_name: command not found
Any idea on how to fix this?
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apropos doesn’t suggest commands, it suggests manpages; some of them will correspond to commands, but not all of them, and even those that correspond to commands might not correspond to commands which are accessible to you.
apropos’ output gives some idea of the kind of documentation it’s listing:
key_encryptsession (3) - interfaces to rpc keyserver daemon
letsencrypt (1) - certbot script documentation
luksformat (8) - Create and format an encrypted LUKS device
The numbers in parentheses correspond to sections: if you’re looking for end-user commands, look for 1 here (as shown for letsencrypt) above.
Try
man gpgsm
man setkey
etc. to view the documentation found by apropos, instead of running the commands.
Stephen Kitt
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...and pay attention to the _section_ the page is in (inside parenthesis in the header of footer). `man man; man -a intro` may be a good start. – Stéphane Chazelas Nov 06 '18 at 17:42
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So there is no way to use the commands that don't have (1)? – Tom Nov 07 '18 at 00:31