In Windows by using
Task Manager we can see how many
.exe files are running. Also in
command prompt we use
tasklist command to see processes. In ubuntu how can I see all processes and kill unwanted processes?
From the terminal,
ps -ef will list all the processes. See
man ps. See
man 2 kill,
man 7 signal, and
man skill to mess with processes. However, simply killing a process that you think is useless may be a mistake. The system might restart the process, or something you depend on might depend on the process you killed. Learn what the processes do, and look at
man service to see how processes are started by the system.
Using GUI, you can use System Monitor
Or from terminal you can use
ps aux | less
To view every process:
ps -A or ps -e
All processes running by a user:
ps -u username
To kill a process, either find the process name and type:
kill -9 processname
or kill the process ID (PID):
Stop/suspend a process:
There is also the tool "htop". It is like "top", but has lots of other capabilities.
In a terminal enter:
sudo apt install htop
My main tool here is
top at the command line in a terminal window
You'll get a list of the process that are running, listed by cpu usage. Wait a few seconds for it to gather more stats before proceeding.
This is my main tool in unix for killing runaway or unwanted processes. They are likely to be near the top of the list. Note their pid and press
q and then either 15 (soft kill) or 9 (hard kill).
Here you see me killing a Chrome process:
The process should go away. Then type
q to quit out of top.
If you find you are always killing the same processes you can also use
killall at the command line, for instance if
top has shown several java programs taking up cpu you can
quit out of top and do
killall use 15 (SIGTERM) by default but you can override this with
killall -9 [process] or
killall -s SIGKILL [process]
Another good tool to use will be Glances.