CentOS Linux system information - Process Activities information

top

• command used to display task that are currently running in real time.

• It can  also used can be used to display system summary information as well as a list of tasks currently being managed by the Linux kernel.

• This command can also used to troubleshoot CPU and memory hogging process.

• The information is refreshed in every 5 seconds.

• To quit from displaying information, press <q> button.

Synopsis

top [options]

 

# top   top - 22:41:30 up 1:41, 2 users, load average: 0.00, 0.01, 0.09 Tasks: 68 total, 1 running, 67 sleeping, 0 stopped, 0 zombie Cpu(s): 0.0% us, 0.7% sy, 0.0% ni, 99.3% id, 0.0% wa, 0.0% hi, 0.0% si Mem: 514440k total, 495676k used, 18764k free, 48672k buffers Swap: 1048568k total, 0k used, 1048568k free, 376168k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 4219 root 15 0 141m 8292 2432 S 0.3 1.6 0:12.61 X 4488 gdm 15 0 20184 9.8m 6412 S 0.3 2.0 0:04.90 gdmgreeter 1 root 16 0 2424 552 472 S 0.0 0.1 0:01.55 init 2 root RT 0 0 0 0 S 0.0 0.0 0:00.00 migration/0 3 root 34 19 0 0 0 S 0.0 0.0 0:00.01 ksoftirqd/0 4 root 5 -10 0 0 0 S 0.0 0.0 0:00.05 events/0 5 root 6 -10 0 0 0 S 0.0 0.0 0:00.02 khelper 6 root 15 -10 0 0 0 S 0.0 0.0 0:00.00 kacpid 87 root 5 -10 0 0 0 S 0.0 0.0 0:00.05 kblockd/0 88 root 15 0 0 0 0 S 0.0 0.0 0:00.00 khubd 105 root 20 0 0 0 0 S 0.0 0.0 0:00.00 pdflush 106 root 15 0 0 0 0 S 0.0 0.0 0:00.46 pdflush 108 root 6 -10 0 0 0 S 0.0 0.0 0:00.00 aio/0 107 root 15 0 0 0 0 S 0.0 0.0 0:00.08 kswapd0 254 root 25 0 0 0 0 S 0.0 0.0 0:00.00 kseriod 374 root 21 0 0 0 0 S 0.0 0.0 0:00.00 scsi_eh_0 395 root 8 -10 0 0 0 S 0.0 0.0 0:00.00 kmirrord

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