At frequent intervals, cpu will be utilized high however sometimes you can’t find which process is consuming. Below commands will help you to find top consuming cpu processes.

[root@rhel6-1 ~]# ps -eo pcpu,args --sort=-%cpu | head -n 10
%CPU COMMAND
 0.8 /sbin/init
 0.8 /sbin/udevd -d
 0.1 hald
 0.0 [kthreadd]
 0.0 [migration/0]CPU 
 0.0 [ksoftirqd/0]
 0.0 [migration/0]
 0.0 [watchdog/0]
 0.0 [events/0]
[root@rhel6-1 ~]# 
[root@rhel6-1 ~]# top -b -n 1 | head -n 12  | tail -n 5
    1 root      20   0 19356 1500 1188 S  0.0  0.1   0:00.84 init
    2 root      20   0     0    0    0 S  0.0  0.0   0:00.00 kthreadd
    3 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/0
    4 root      20   0     0    0    0 S  0.0  0.0   0:00.00 ksoftirqd/0
    5 root      RT   0     0    0    0 S  0.0  0.0   0:00.00 migration/0
[root@rhel6-1 ~]# ps -eo pcpu,pid,user,args --no-headers| sort -t. -nk1,2 -k4,4 -r |head -n 10
 0.0     9 root     [khelper]
 0.0     8 root     [cgroup]
 0.0   807 root     [flush-253:0]
 0.0     7 root     [events/0]
 0.0   799 root     [kauditd]
 0.0   755 root     [ext4-dio-unwrit]
 0.0   754 root     [jbd2/vda1-8]
 0.0    72 root     [kstriped]
 0.0     6 root     [watchdog/0]
 0.0     5 root     [migration/0]

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