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ssh autocomplete

Terminal - ssh autocomplete
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
Up
Down
ssh autocomplete

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

Show sample output | Add to favourites | Report as malicious

Alternatives

There are 7 alternatives - 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
9
Up
Down
ssh autocomplete

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

Edit:

replaced

sort | uniq

by

sort -u
Comments (2) | Add to favourites | Report as malicious
perl -ne 'print "$1 " if /^Host (.+)$/' ~/.ssh/config
2011-08-21 14:51:20
User: bashrc
Functions: perl
3
Up
Down
ssh autocomplete based on ~/.ssh/config

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

Comments (1) | Add to favourites | Report as malicious
complete -W "$(sed 's/;.*//;' /etc/hosts | awk ' /^[[:digit:]]/ {$1 = "";print tolower($0)}')" ssh
2011-06-20 03:54:45
User: daodennis
Tags: ssh bashrc tab completion /etc/hosts
-1
Up
Down
Enable tab completion for known SSH hosts

If you have a lot of hosts in /etc/hosts this would be very useful. Anyone have any more concise examples?

Comments (0) | Add to favourites | Report as malicious
complete -W "$(while IFS=' ,' read host t; do echo $host; done < ~/.ssh/known_hosts)" ssh
2011-02-10 03:34:35
User: smax
-2
Up
Down
ssh autocomplete

Simple and fast variant, not using external programs. Another variation:

complete -W "$(while read line; do echo ${line%%[, ]*}; done < ~/.ssh/known_hosts)" ssh

HashKnownHosts must be off, of course.

Comments (0) | Add to favourites | Report as malicious
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
Tags: ssh bashrc tab completion
-2
Up
Down
Enable tab completion for known SSH hosts
Comments (2) | Add to favourites | Report as malicious

Know a better way?

If you can do better, submit your command here.

What others think

Doesn't work very well on a modern SSH system where the known_hosts file is hashed. It's a good idea though.

Comment by ajt 200 weeks and 1 day ago

@ajt to turn off hostname hashing, you may change either /etc/ssh/ssh_config or ~/.ssh/config and change HashKnownHosts from yes to no.

.

The approach shown here is cute, but there is a package in Debian/Ubuntu named 'bash-completion' which extends bash's command completion to help you tab-complete program *arguments*, like ssh hostnames or image/gimp file names when running gimp.

Comment by bwoodacre 200 weeks and 1 day ago

@bwoodacre however the know_hosts file is hashed for a reason - to prevent "bad" scripts from hoping from server to server...

Comment by ajt 200 weeks ago

@ajt I read your comment as you saying there was no way to turn off that hashing and so mentioned how to do it. Obviously there is a reason that hashing is turned on by default for added security, but it is still an option that may be turned off by the user if they so choose.

Comment by bwoodacre 199 weeks and 4 days ago

Your point of view

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