htop is an interactive process viewer — a friendlier alternative to top with mouse support, trees, and easy filters. Install via sudo apt install htop.
Syntax
htop[options]
Common Options
Option
Description
-d tenths
Delay (tenths of a second)
-u user
Only this user
-p PID,…
Only these PIDs
-t / --tree
Tree view
-C
Monochrome
Useful keys
Key
Action
F1/h
Help
F2
Setup (meters, columns)
F3//
Search
F4/\
Filter
F5
Tree
F6
Sort column
F9/k
Kill (pick signal)
F7/F8
Nice − / +
Space
Tag
u
User filter
H/K
Hide user/kernel threads
p
Show full path
q
Quit
Examples with Explanations
htophtop-u"$USER"htop-p$(pgrep-d, nginx)htop-t
Tips
Setup → display options: show CPU in “bar” or detailed numbers.