Ubuntu – Unable to run shell script inside VI/VIM

Add following mapping to your vimrc:

" Editing a protected file as 'sudo'
cmap W w !sudo tee % >/dev/null<CR>

Now edit the protected files as you normally do:

vim /etc/www/main.wsgi

but when you want to save the changes use :W instead of :w, vim will prompt for a sudo password, enter your sudo password and hit Enter. That's it!

That is a bash function, and to pass arguments to bash functions, you don't need (). Also, the function adds the ppa: prefix to its arguments, so just this would do:

add_ppa otto-kesselgulasch/gimp-edge

Additionally, the function supports multiple arguments, so you can run it for multiple PPAs:

add_ppa otto-kesselgulasch/gimp-edge foo/bar a/b

Given that you have put the function in a script, you should either:

• source it as Zanna suggests to get the function in your shell and call the function, or

• just use the contents of the function as the script:

  #! /bin/bash
  for i in "$@"; do
    if grep -Rq "^deb.*$i" /etc/apt/sources.list.d/*.list
    then
      echo "Adding ppa:$i"
      sudo add-apt-repository -y ppa:$i
    else
      echo "ppa:$i already exists"
    fi
  done
  

  And the call the script with the ppa name:

  ppa otto-kesselgulasch/gimp-edge