Disable Ubuntu No Command 'X' found, did you mean
I type pretty fast when I'm on the command line and periodically, for commands that don't really matter, I don't check what I've typed and just press enter. This is especially true for directory listings which I have "ls -la" pretty much hard coded into my fingers. This particular one I mistype as "ls- la" all the time.
On Ubuntu, and other "helpful" platforms, there is a package installed called "command-not-found" which will take about 2-3 seconds to come up with a list of command it thinks you might have wanted to type but you haven't got installed right now.
$ ls- la No command 'ls-' found, did you mean: Command 'lsh' from package 'lsh-client' (universe) Command 'lsw' from package 'dwm-tools' (universe) Command 'ls' from package 'coreutils' (main) ls-: command not found
This is incredibly annoying.
To remove the problem, just uninstall the packages, and restart your bash session.
apt-get remove command-not-found command-not-found-dataYou might need a sudo in front of that if you haven't killed that off yet.
The end result, the traditional and almost instant command not found response!
$ ls- la
bash: ls-: command not foundAh, bliss.