Rhcsa 04 - process management

Run the process

Background running process

[[email protected] ~]# dd if=/dev/zero of=/dev/null &  # Run the process in the background 
[1] 10125
[[email protected] ~]# jobs # View background processes 
[1]+  Running                 dd if=/dev/zero of=/dev/null &
[[email protected] ~]# fg 1 # Put the specified background process into the foreground 
dd if=/dev/zero of=/dev/null

recovery stop The process of

[[email protected] ~]# dd if=/dev/zero of=/dev/null
^Z
[1]+  Stopped                 dd if=/dev/zero of=/dev/null
[[email protected] ~]# bg
[1]+ dd if=/dev/zero of=/dev/null &

Monitor progress

top command

 ps command

Change process priority  

By default , All processes have the same priority . The value of priority is from -19（ Highest priority ） To 20（ Lowest priority ）.

[[email protected] ~]# nice -n -10 dd if=/dev/zero of=/dev/null &
[1] 10270

stay top Display page , Press r, Then input 10270, Then input nice value -15, You can change the priority value to -15,

Kill the process

killall dd Kill all dd process

  You can also use kill <PID> A separate kill A process .