Tmux basics:

Enter tmux (without attach will create new session):
tmux

Config file: $HOME/.tmux.conf

Ctrl + x (prefix, origianlly Ctrl + B)

Hide bottom status bar:
Ctrl + x + z

Vertical split
Ctrl + x + %
OR (personalized)
Ctrl + x + =

Horizontal split
Ctrl + x + "
OR (personalized)
Ctrl + x + -

Navigate between panes (vim style):
Ctrl + x + j (navigate one split down horizonatal)
Ctrl + x + k (navigate one split up horizonatal)
Ctrl + x + h (navigate one split left vertical)
Ctrl + x + l (navigate one split right vertical)

Alternating panes placement:
Ctrl + x + {
Ctrl + x + }

Resizing panes:
Ctrl + x + Alt + <left_arrow>
Ctrl + x + Alt + <right_arrow>
Ctrl + x + Alt + <up_arrow>
Ctrl + x + Alt + <down_arrow>

Create new window
Ctrl + x + c

Navigate between windows (emacs style):
Ctrl + x + p (previous)
Ctrl + x + n (next)

Rename a window (for ease of recognition):
Ctrl + x + ,

Kill a window( or exit if only window):
Ctrl + x + &
OR (personalized)
Ctrl + x + x

You can also kill a window by entering into the terminal:
exit

Of course you can just exit each window one by one (but this is cumbersome), to
kill all windows and the session:
Ctrl + x + s + x
OR
Ctrl + x + : + kill-session

If you didn't kill the window this way, the session is still open and you can
"attach" to that session like so:
tmux attach

PLUGINS
-tmux-resurrect: saves session of tmux even after reboot
Ctrl + x + Ctrl + s (saves session)
Ctrl + x + Ctrl + r (resurrects last session)

NOTE: saved session files are found in ~/.tmux/resurrect/
If you wish to restore a previous resurrect "save point", go to this directory
and:
ln -sf <file_name>.txt last
This will soft link the last file (resurrect looks here) to whichever point you
wish to go to (inspect file contents to find out).