Linux view the number of processes and threads

1. View the process: Ps-ef or Ps-aux

Get the PID of the process:
such as:PSgrepgrep"grep"awk'{print $ 2}'

2. Query According to the process number:

# pstree-p Process Number

# TOP-HP Process Number

3. Query According to the process name:

# pstree-p ' ps-e | grep Server | awk ' {print '} '

# pstree-p ' ps-e | grep Server | awk ' {print '} ' | Wc-l

4. View the number of threads

Need to get the PID of the thread

View all threads of a process #PSMp6648-o thread,tiduser%CPU PRI SCNT wchan USER SYSTEM tidroot0.0-    - -         -      -     -Root0.0   -- -         -      -6648Root0.0   +- -         -      -6650Root1.0   -- -         -      -14214Root0.0   at-Futex_--14216Root0.0   A-184466-      -15374Root0.0   at-184466-      -15376Root0.0   at-184466-      -15378Root0.0   at-184466-      -15380Root0.0   at-184466-      -15392Root0.0   at-184466-      -15394Root0.0   at-184466-      -15398View All child processes: # Pstree-P6648Agent_executor (6648) ─┬─Tar(15601) ───gzip(15607) ├─{agent_executor} (6650) ├─{agent_executor} (14214) ├─{agent_executor} (14216) ├─{agent_executor} (15374) ├─{agent_executor} (15376) ├─{agent_executor} (15378) ├─{agent_executor} (15380) ├─{agent_executor} (15392) ├─{agent_executor} (15394) └─{agent_executor} (15398)

5. Process start time (how long it takes to run)

Ps-eo Lstart Start-up time

Ps-eo ETime How long it takes to run.

Ps-eo Pid,lstart,etime | grep 5176

Explanation of ========================================PS aux or lax output =========================2,PS  %cpu%mem VSZ RSS TTY STAT START time Commanduser: Process owner PID: Process ID%CPU: CPU usage %MEM: occupied Memory usage vsz: Virtual memory size consumed RSS: Memory size used TTY: Terminal's secondary appliance number (minor device numbers of TTY) STAT: Process state: Start: Time when the process was started; time: The process consumes the CPU; COMM And: The name and parameters of the command;

Linux view the number of processes and threads