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vim

Howto

Remove trailing whitespace

  1. On current line: 

    :s/\s\+$//

  2. On all lines in the file: 

    :%s/\s\+$//e
    (The 'e' flag prevents error messages if no trailing spaces are found)

  3. On selected lines:

  4. First, visually select the lines (V)
  5. Then apply the substitution to the selection: 
    :'<,'>s/\s\+$//

Disable modelines (security risk)

Add to ~/.vimrc

" [security](https://www.techrepublic.com/article/turn-off-modeline-support-in-vim/)
set modelines=0
set nomodeline

Make VIM default editor

dnf install -y --allowerasing vim-default-editor

Delete all comments

:g/^#/d

Delete all blank lines

:g/^$/d

redhat / centos vi sucks

# ~/.bashrc
alias vi=vim

Set default editor on ubuntu

sudo update-alternatives --config editor

See also

Primetimegen