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Enable tab completion for known SSH hosts

Terminal - Enable tab completion for known SSH hosts
complete -W "$(echo `cat ~/.ssh/known_hosts | cut -f 1 -d ' ' | sed -e s/,.*//g | uniq | grep -v "\["`;)" ssh
2011-06-01 23:21:06
User: sammcj
-2
Enable tab completion for known SSH hosts

Alternatives

There is 1 alternative - vote for the best!

Terminal - Alternatives
complete -W "$(echo $(grep '^ssh ' .bash_history | sort -u | sed 's/^ssh //'))" ssh
2009-07-25 23:07:25
User: 0x89
11

Stop tormenting the poor animal cat. See http://sial.org/howto/shell/useless-cat/.

Edit:

replaced

sort | uniq

by

sort -u
perl -ne 'print "$1 " if /^Host (.+)$/' ~/.ssh/config
2011-08-21 14:51:20
User: bashrc
Functions: perl
5

I use this in my bashrc to expand hosts defined in ~/.ssh/config:

function _ssh_completion() {

perl -ne 'print "$1 " if /^Host (.+)$/' ~/.ssh/config

}

complete -W "$(_ssh_completion)" ssh

Here's a great article on how to setup your own ~/.ssh/config:

http://blogs.perl.org/users/smylers/2011/08/ssh-productivity-tips.html

complete -W "$(echo `cat ~/.ssh/known_hosts | cut -f 1 -d ' ' | sed -e s/,.*//g | uniq | grep -v "\["`;)" ssh
2009-07-23 15:59:55
User: viner
3

Add to your bash profile to minimize carpal tunnel syndrome.

Doesn't work with user@hostname but appending "-l user" works fine if needed.

Works for ping as well..

complete -W "$(echo `cat ~/.ssh/known_hosts | cut -f 1 -d ' ' | sed -e s/,.*//g | uniq | grep -v "\["`;)" ping

complete -o default -o nospace -W "$(grep -i -e '^host ' ~/.ssh/config | awk '{print substr($0, index($0,$2))}' ORS=' ')" ssh scp sftp
2013-11-19 14:44:41
User: Wamith
Functions: scp ssh
1

I sue this in my .bashrc file

This will also do auto-completion for scp and sftp

complete -W "$(echo $(grep ^Host ~/.ssh/config | sed -e 's/Host //' | grep -v "\*"))" ssh
2014-09-20 19:16:24
User: nathancahill
1

Autocomplete from .ssh/config

Know a better way?

If you can do better, submit your command here.

What others think

Useful. But we can make it better.

Lose the "cat" and pipe the file straight into sed.

Use "sed" to delete everything after a comma or a space (no need for cut).

Then use "sort -u" to remove duplicates. "uniq" will only work if the list is already sorted.

I've dropped your final "grep" -- I'm sorry, I don't understand it. When do you see "[" in your hostnames?

complete -W "$(echo $(sed 's/[, ].*//' < ~/.ssh/known_hosts | sort -u))" ssh
Comment by flatcap 213 weeks and 3 days ago

But your command and my improvement are static -- the list of hostnames is only read once.

What you really need is something that reads known_hosts every time.

Then, if you ssh to a new host, the name is added to known_hosts and the completion automatically picks it up.

This function does the trick. It's not a one-liner any more :-)

_ssh_complete () { local cur _get_comp_words_by_ref cur COMPREPLY=( $( compgen -W "$(echo $(sed 's/[, ].*//' < ~/.ssh/known_hosts | sort -u))" -- "$cur" ) ) } complete -F _ssh_complete ssh
Comment by flatcap 213 weeks and 3 days ago

Your point of view

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