Re: How to call something when a command is not found?

[Marco Ippolito]

Right, and they just have this in the distro's `/etc/bash.bashrc`:

# if the command-not-found package is installed, use it
if [ -x /usr/lib/command-not-found -o -x
/usr/share/command-not-found/command-not-found ]; then
        function command_not_found_handle {
                # check because c-n-f could've been removed in the meantime
                if [ -x /usr/lib/command-not-found ]; then
                   /usr/lib/command-not-found -- "$1"
                   return $?
                elif [ -x /usr/share/command-not-found/command-not-found ];
then
                   /usr/share/command-not-found/command-not-found -- "$1"
                   return $?
                else
                   printf "%s: command not found\n" "$1" >&2
                   return 127
                fi
        }
fi

so if one forgets to `apt-get remove --purge python3-commandnotfound`,
their script kicks in.


On Tue, 9 Mar 2021 at 18:46, Eduardo Bustamante <dualbus@gmail.com> wrote:

> On Tue, Mar 9, 2021 at 1:40 PM Peng Yu <pengyu.ut@gmail.com> wrote:
> >
> > Hi,
> >
> > On ubuntu, if a command is not found, it will be prompt to get it
> > installed. Does anybody know this is achieved in bash? Thanks.
> >
> > $ shc
> > Command 'shc' not found, but can be installed with:
> > sudo apt install shc
> > Do you want to install it? (N/y)y
>
> Lookup `command_not_found_handle' in your Bash manual
>
>