I am a brand new sysadmin for the Ubuntu working system. How do I test operating course of in Ubuntu utilizing the command line possibility?
One can use the Ubuntu command line or terminal app to show a operating course of, change their priorities degree, delete course of and extra. This web page exhibits find out how to use varied instructions to listing, kill and handle course of on Ubuntu.
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Verify operating course of in Ubuntu
The process to watch the operating course of in Ubuntu utilizing the command line is as follows:
Open the terminal window on UbuntuFor distant Ubuntu server use the ssh command for log in purposeType the ps aux command to see all operating course of in UbuntuAlternatively, you may subject the highest command to view operating course of in Ubuntu
Please be aware that [[email protected]:~]$ is my shell immediate. It’s worthwhile to kind all instructions after that immediate.
Easy methods to handle processes from the Ubuntu terminal
The ps command is a standard Ubuntu Linux command to lists operating processes. The next command exhibits all processes operating in your Ubuntu based mostly system:
[[email protected]:~]$ ps -aux
[[email protected]:~]$ sudo ps -a
The method ID (PID) is important to kill or management course of on Ubuntu. For instance take into account the next outputs:
esha 42421 zero.zero zero.zero 13160 8452 – S 22:18 zero:00.03 firefox
The place,
esha – Consumer title42421 – PID (Ubuntu Linux course of ID)22:18 – Course of begin timefirefox – Precise course of or command
There could also be too many processes. Therefore, it makes use of the next much less command/extra command as pipe to show course of one display screen at a time:
[[email protected]:~]$ ps -aux | extra
[[email protected]:~]$ sudo ps -aux | much less
Press q to exit from above Ubuntu Linux pagers. You possibly can seek for a selected Ubuntu course of utilizing grep command/egrep command:
[[email protected]:~]$ ps aux | grep nginx
[[email protected]:~]$ sudo ps aux | grep vim
[[email protected]:~]$ sudo ps -aux | egrep ‘sshd|openvpn’
pgrep command
Ubuntu comes with the pgrep command to go looking/discover course of. The syntax is:
[[email protected]:~]$ pgrep course of
[[email protected]:~]$ sudo pgrep sshd
[[email protected]:~]$ pgrep vim
[[email protected]:~]$ pgrep -l take a look at.sh
The -l possibility handed to the pgrep command to show lengthy format and course of title too.
high command
The high command is one other extremely beneficial technique to see your Ubuntu servers useful resource utilization. One can see an inventory of high course of that utilizing essentially the most reminiscence or CPU or disk. Run:
[[email protected]:~]$ high
[[email protected]:~]$ sudo high
[[email protected]:~]$ sudo high [options]
Ubuntu kill command
Need to kill a course of on Ubuntu? Strive kill command. The syntax is:
[[email protected]:~]$ kill pid
[[email protected]:~]$ kill -signal pid
Discover PID utilizing ps, pgrep or high command. Say you wish to kill a PID # 25123, run:
[[email protected]:~]$ kill 25123
For some motive if the method cannot be killed, attempt forceful killing:
[[email protected]:~]$ kill -9 25123
OR
[[email protected]:~]$ kill -KILL 25123
pkill command
In the event you want to kill a course of by title, attempt pkill command on Ubuntu. The syntax is:
[[email protected]:~]$ pkill processName
[[email protected]:~]$ pkill vim
[[email protected]:~]$ pkill firefox
[[email protected]:~]$ pkill -9 emacs
[[email protected]:~]$ sudo pkill -KILL php7-fpm
killall command
The killall command kills processes by title, versus the choice by PID as achieved by kill command:
[[email protected]:~]$ killall vim
[[email protected]:~]$ killall -9 emacs
good and renice command
The first objective of the good command is to run a course of/command at a decrease or larger precedence. Use the renice command to change the good worth of a number of operating Ubuntu processes. The great worth can vary from -20 to 19, with 19 being the bottom precedence. Say, you wish to compile software program on a busy Ubuntu Linux 18.04 LTS server. You possibly can set a really low precedence, enter:
[[email protected]:~]$ good -n 13 cc -c *.c &
Set a really excessive precedence for a kernel replace. Earlier than rebooting Ubuntu server, run:
[vivek@ubuntuLTS:~]$ good –10 wall <<finish
System reboots in 5 minutes for Ubuntu Linux kernel replace!
Save all of your work!!!
Â
— Sysadmin
finish
[[email protected]:~]$ good –10 wall <<finish
System reboots in 5 minutes for Ubuntu Linux kernel replace!
Save all of your work!!! — Sysadmin
finish
To alter the precedence of a operating course of, kind the next:
[[email protected]:~]$ renice Precedence -p
[[email protected]:~]$ renice Precedence
[[email protected]:~]$ pgrep vim
[[email protected]:~]$ renice 10 69947
[[email protected]:~]$ sudo renice -10 $(pgrep vim)
Conclusion
This web page exhibits find out how to handle the method on the Ubuntu terminal. For additional data see man pages or our instance pages:
