Here we have the answer for all the above questions.
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| Listing and controlling process | |
|---|---|
| PTOOLS | DESCRIPTION |
| ptree | To print a process origin tree of the system |
| pkill | To kill the process using pid or using pgrep |
| pgrep | To match a process name from process list |
| prun | To continue a process specific process |
| pstop | To freeze a process specific process |
| pwait | To wait for a process to finish |
| preap | To reap zombies i.e to clear the zombie process |
Here i will just show you the putty terminal output of each commands.
ptree:
Using ptree command you can see where that process has been started and you can see its origin.
# ptree 3222
2141 /sbin/sh - /usr/lib/vxvm/bin/vxcached root
3222 /sbin/sh - /usr/lib/vxvm/bin/vxcached root
3223 vxnotify -C -w 15
#
pkill:
Using pkill command you can kill the process using process id (pid). This is just alternative of “kill -9 pid”
# ps -ef |grep find
root 10881 4080 7 22:52:05 pts/3 0:04 find / -name test
root 10886 4080 0 22:52:22 pts/3 0:00 grep find
# kill -9 10881
pgrep:
using pgrep command,you can filter the process using certain criteria.
# pgrep sshd
1814
15250
4068
4069
Verifying our work using below command
# ps -ef |egrep "1814|15250|4068|4069"
root 1814 1 0 May 06 ? 0:01 /usr/lib/ssh/sshd
root 4076 4069 0 18:18:19 pts/3 0:00 -sh
root 15250 1 0 02:08:11 ? 0:00 /usr/lib/ssh/sshd
root 4068 1814 0 18:18:13 ? 0:00 /usr/lib/ssh/sshd
root 4069 4068 0 18:18:13 ? 0:03 /usr/lib/ssh/sshd
#
pstop:
You can suspend the process temporarily using pstop command.This will just freeze the process unless untill you start it again.
# ps -ef |grep find
root 11162 4080 4 23:02:18 pts/3 0:02 find / -name test
root 11164 4080 0 23:02:31 pts/3 0:00 grep find
# pstop 11162
# prstat
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
11162 root 1656K 1048K stop 60 0 0:00:47 27% find/1
prun:
The prun command used to start the process which was stopped by pstop command.
# prun 11162
# prstat
PID USERNAME SIZE RSS STATE PRI NICE TIME CPU PROCESS/NLWP
11162 root 1656K 1048K cpu0 53 0 0:00:22 20% find/1
pwait:
The pwait command just blocks and waits for termination of a process in Solaris.
# pwait 11162
preap:
Using preap,you can just get rid of zombie process aka defunct process
Please see the link to know more about preap.
Hope you have learned more about Solaris process controlling.
Thank you for reading the article. Please leave a comment if you have any doubt.
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