You can do it in
screen the terminal multiplexer.- To split vertically: ctrla then |.
- To split horizontally: ctrla then S (uppercase one).
- To un-split: ctrla then Q (uppercase one).
- To switch from one to the other: ctrla then tab
Note: After splitting, you need to go into the new region and start a new session via ctrla then c before you can use that area.
EDIT, basic screen usage:
- New terminal: ctrla then c.
- Next terminal: ctrla then space.
- Previous terminal: ctrla then backspace.
- N'th terminal ctrla then [n]. (works for n∈{0,1…9})
- Switch between terminals using list: ctrla then " (useful when more than 10 terminals)
- Send ctrla to the underlying terminal ctrla then a.
