Uncomment all lines in VI Editor

Uncommenting Multiple Lines

    1. Press CTRL + V to enable visual block mode.
    2. Move down and select the lines till you want to uncomment.
    3. press x and it will uncomment all the selected lines at once.

Comment out all lines in VI Editor

Commenting Multiple Lines

    1. First, press ESC

    2. Go to the line from which you want to start commenting. Then, press ctrl + v, this will enable the visual block mode.

    3. use the down arrow to select multiple lines that you want to comment.

    4. Now, press SHIFT + I to enable insert mode.

    5. Press # and it will add a comment to the first line. Then press ECS and wait for a second, # will be added to all the lines.