Top linux commands

Top linux commands

The top command displays information about the processes being executed by the current system. Including process ID and memory usage. The top command format is as follows:

Top [OPTIONS] OPTIONS: -Batch B-c display the complete name of the process-I ignore invalid process-s confidentiality mode-S accumulation mode-I <time> set interval-u <User Name> specify user name- p <process number> specified process-n <times> Number of cycles displayed

Top output information:

top - 15:08:48 up 1:53, 3 users, load average: 0.00, 0.01, 0.05Tasks: 160 total, 1 running, 159 sleeping, 0 stopped, 0 zombieCpu(s): 0.1%us, 0.2%sy, 0.0%ni, 99.6%id, 0.1%wa, 0.0%hi, 0.0%si, 0.0%stMem: 2061364k total, 1029032k used, 1032332k free, 224832k buffersSwap: 2095100k total, 0k used, 2095100k free, 440620k cached PID USER PR NI VIRT RES SHR S %CPU %MEM TIME+ COMMAND 1777 root 20 0 150m 80m 13m S 4 4.0 0:19.91 Xorg 3602 gino 20 0 91844 15m 10m S 2 0.8 0:00.45 gnome-terminal 1 root 20 0 3644 1968 1280 S 0 0.1 0:00.80 init 2 root 20 0 0 0 0 S 0 0.0 0:00.00 kthreadd 3 root 20 0 0 0 0 S 0 0.0 0:00.06 ksoftirqd/0 4 root 20 0 0 0 0 S 0 0.0 0:00.00 kworker/0:0 6 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/0 7 root RT 0 0 0 0 S 0 0.0 0:00.03 watchdog/0 8 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/1 10 root 20 0 0 0 0 S 0 0.0 0:00.07 ksoftirqd/1 11 root 20 0 0 0 0 S 0 0.0 0:00.50 kworker/0:1 12 root RT 0 0 0 0 S 0 0.0 0:00.03 watchdog/1 13 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/2 15 root 20 0 0 0 0 S 0 0.0 0:00.02 ksoftirqd/2 16 root RT 0 0 0 0 S 0 0.0 0:00.03 watchdog/2 17 root RT 0 0 0 0 S 0 0.0 0:00.00 migration/3 19 root 20 0 0 0 0 S 0 0.0 0:00.02 ksoftirqd/3 20 root RT 0 0 0 0 S 0 0.0 0:00.03 watchdog/3 21 root 0 -20 0 0 0 S 0 0.0 0:00.00 cpuset 22 root 0 -20 0 0 0 S 0 0.0 0:00.00 khelper 23 root 20 0 0 0 0 S 0 0.0 0:00.00 kdevtmpfs 24 root 0 -20 0 0 0 S 0 0.0 0:00.00 netns 25 root 20 0 0 0 0 S 0 0.0 0:00.00 kworker/u:1 26 root 20 0 0 0 0 S 0 0.0 0:00.02 sync_supers 27 root 20 0 0 0 0 S 0 0.0 0:00.00 bdi-default 28 root 0 -20 0 0 0 S 0 0.0 0:00.00 kintegrityd 29 root 0 -20 0 0 0 S 0 0.0 0:00.00 kblockd 30 root 0 -20 0 0 0 S 0 0.0 0:00.00 ata_sff 31 root 20 0 0 0 0 S 0 0.0 0:00.00 khubd 32 root 0 -20 0 0 0 S 0 0.0 0:00.00 md 34 root 20 0 0 0 0 S 0 0.0 0:00.00 khungtaskd 35 root 20 0 0 0 0 S 0 0.0 0:00.00 kswapd0 36 root 25 5 0 0 0 S 0 0.0 0:00.00 ksmd 37 root 39 19 0 0 0 S 0 0.0 0:00.00 khugepaged 38 root 20 0 0 0 0 S 0 0.0 0:00.00 fsnotify_mark 39 root 20 0 0 0 0 S 0 0.0 0:00.00 ecryptfs-kthrea 40 root 0 -20 0 0 0 S 0 0.0 0:00.00 crypto 48 root 0 -20 0 0 0 S 0 0.0 0:00.00 kthrotld 49 root 20 0 0 0 0 S 0 0.0 0:00.00 scsi_eh_0 50 root 20 0 0 0 0 S 0 0.0 0:00.00 scsi_eh_1 52 root 20 0 0 0 0 S 0 0.0 0:00.00 kworker/u:3 71 root 0 -20 0 0 0 S 0 0.0 0:00.00 devfreq_wq 72 root 20 0 0 0 0 S 0 0.0 0:00.24 kworker/1:1

Top Command output information:

The first line is the same as the uptime command execution result 15:08:38 -- the current system time is up -- the system has run time (during which the system has not restarted) 3 users -- current number of users logging on to the system load average -- the system load value is 1 minute, 5 minutes, 15 minutes, and the second line. Process description: 160 total -- total number of processes in the system 1 running -- number of running processes 159 sleeping -- number of dormant processes 0 stopped -- number of terminated processes 0 zombie -- number of zombie processes in the third row, cpu status information 0.1% us -- percentage of CPU occupied by user space 0.2% sy -- percentage of CPU occupied by kernel space 0.0% ni -- percentage of CPU occupied by processes with changed priorities 99.6% id -- percentage of idle CPU 0.1% wa -- percentage of CPU occupied by I/O wait: 0.0% hi -- percentage of CPU occupied by hard interrupt: 0.0% si -- percentage of CPU occupied by Soft Interrupt 0.0% st -- the time when the CPU uses an internal virtual machine to run the task. Row 4: memory status 2061364 k total -- total physical memory 1029032 k used -- total used memory 1032332 k free -- total idle memory 224832 k buffers -- total cached memory the fifth line, swap partition information 2095100 k total -- Swap partition total 0 k used -- used interaction zone total 2095100 k free -- idle interaction zone total 440620 k cached -- cached interaction zone total

The seventh row is the State Monitoring Project column of each process. PID -- Process idUSER -- process owner PR -- Process Priority NI -- nice value. A negative value indicates a high priority, and a positive value indicates a low priority VIRT-the total amount of virtual memory used by the process. VIRT = SWAP + RESRES -- physical memory used by the process, not swapped out. RES = CODE + DATASHR -- size of the shared memory. S -- Process status. S: Sleep R: Run T: TRACE/Stop Z: Zombie process D: uninterruptible sleep status % CPU -- percentage of cpu time consumed since the last update % MEM -- Process usage regardless of memory percentage TIME + -- total cpu time used by the process, unit: 1/100 seconds COMMAND -- process name

Top interactive commands
After running the top command, you can use some interactive commands. These commands are single-letter. If the s option is used in the command line, some of these commands may be blocked.

H. The help screen is displayed, and some brief command summaries are provided to explain that k terminates a process. I ignore idle and dead processes. This is a switch-on command. Q exit program r reschedule the priority S of a process to switch to the cumulative Mode s to change the delay time between two refreshes (unit: s). If there is a decimal number, it is converted to m s. If the input value is 0, the system will continue to refresh, the default value is 5 sf or F. add or delete a project from the current display. o or O changes. display the order of items. l switch. display average load and start time. m switch. Display memory information. t switch. display process. and CPU status information c switch display command name and complete command line M sort by resident memory size P sort by CPU usage percentage T sort by time/accumulative time W set the current write ~ /. Toprc File