Bash – How to fix this SSH hostname tab completion script

autocompletebashshell-script

I found the following script (for bash) that enables me to get tab completion for any hostname I've connected to (from ~/.ssh/known_hosts):

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

However, the problem is that the tab completion doesn't work after I've typed a username.

How can I improve this so if I type…

ssh myusername@my

and expect it to complete "myhostname.com" it will be able to do so?

It would be even better if it could tab whole strings (user@hostname) as well, but I can live with either option. Without the first, this isn't much use unless my host username matches the local username.

Best Answer

The known_hosts file by default usually contains hashed entries which bash_completion can't parse.

You can edit your ssh_config (/etc/ssh/ssh_config) to set:

HashKnownHosts no

Then you'll probably need to clear your current known hosts file:

> ~/.ssh/known_hosts

Related Solutions

How to get the shell functions to make use of existing autocompletion in zsh

To request that a command be completed like another command that is already known to the completion system, you can use the compdef my_command=known_command form of compdef.

compdef s=ssh
compdef {cxterm,uxterm,xterm-color}=xterm

Under the hood, this is basically equivalent to _comps[s]=$_comps[ssh].

Some completion commands apply to a family of functions and read the first word of the command line to determine which particular command to complete. For example, the commands ssh, scp, sftp and a few more are all completed by the function _ssh. In that case, you need to tell the completion function which “service” your function is like (by default, the service is the executable name, here your function's name).

_s () {
  local service=ssh
  _ssh "$@"
}
compdef _s s

How to Disable Bash Tab Completion

put

 set disable-completion on

string in ~/.inputrc and restart your shell. it will disable completion at all.

Best Answer

Related Solutions

How to get the shell functions to make use of existing autocompletion in zsh

How to Disable Bash Tab Completion

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