By default search keyword won’t be highlighted in vim with Ubuntu OS.
To highlight search keyword we need to set hlsearch flag in vimrc.
Open /etc/vim/vimrc with sudo and append following line in it:
After that save & exit from vimrc file. This will enable search keyword highlight across all vim sessions.
If you want to enable highlighting only for current session run following command in vim after opening a file:
By using simple substitution we can convert text in vim either to lowercase or to uppercase.
I have a following text in in one of file:
To convert complete text to uppercase use following substitution code:
Similarly to convert complete text to lowercase use substitution code:
By default vim editor is enabled to search case sensitive search.
Above example will looks for linux only not Linux or LINUX.
To enable case insensitive search use \c at start/end of your search key word.
Any of above example will ignore case and will search for linux.
Here I am showing couple of examples to comment several line at once using vim editor.
I have a text file with 15 line in it.
To comment from line number 5 to 10:
To comment 5 lines after line number 5 and including line number 5:
To comment all lines:
To count occurrences of a word in vim run following expression:
Here I am opening a file with vim editor and calculating number occurrences of a word “done”.
It will display count in status line without changing buffer. This expression is supported by recent versions of vim only.
In older versions of vim use following expression:
This expression will edit file and shows us count. After viewing count in status line press u to undo changes.