Vim

• :!{commands}: run unix commands
• zf%: fold current code block
• zc: close fold
• zo: open fold
• cit: change inside the tag
• cs"': change surrounding double quotes to single quotes
• ds": remove surrounding delimiters
• ysiw]: wrap [] around the current word
• yss): wrap () around the sentence
• m{a-zA-Z}: mark the current cursor location with the designated letter
• `{mark}: moves the cursor back to where a mark was set
• %: jump between parentheses
• zg: learn spelling
• zw: mark as misspelled
• z=: fix spelling
• ctrl-w, r: rotates window
• ctrl-w, x: swap window with the next one
• :source $MYVIMRC: load the new configuration into Vim session. If the vimrc file is the active buffer, then it can be shortened to :source %.

To replace all foo with bar within the current buffer

:%s/foo/bar/g

To search in the working directory:

:Ack foo

Or, search in the specified path:

:Ack foo /path/to/dir

Now, the quickfix window shows up with every result found. Delete the undesired result by typing dd.

To replace every result still present in the quickfix window:

:Acks /foo/bar/