Squashing multiple commits in Vim with visual block command in Terminal

Steps to squash multiple commits in Terminal using Vim

1. git rebase -i HEAD~5 (5 or however many commits you had, differing from master)
2. Put the cursor highlight on the SECOND commit using your arrow keys.
3. To enable visual block, do CRTL + V
4. Use DOWN arrow keys to highlight pick for each commit (not including the commit you want to squash the other commits into).
5. Press f for fixup (or s for squash - this depends on the command you want to use)
6. Exit visual mode by pressing Esc.
7. When you do :wq to exit Vim, the fixups will be filled in for you automatically, removing the need to do it manually for each commit.

More reading: Atlassian Git Rebase