ps-进程管理指令

https://blog.csdn.net/yspg_217/article/details/121845366

https://blog.csdn.net/qq_44681788/article/details/130902259

https://www.zhihu.com/question/378345922/answer/2871122003?utm_id=0

参数说明

https://download.csdn.net/blog/column/12529139/135104281
https://www.cnblogs.com/zypdbk/p/16307104.html

linux版本

root@xinyi-virtual-machine:~# ps --help all

用法：
 ps [选项]

基本选项：
 -A, -e               all processes
 -a                   all with tty, except session leaders
  a                   all with tty, including other users
 -d                   all except session leaders
 -N, --deselect       negate selection
  r                   only running processes
  T                   all processes on this terminal
  x                   processes without controlling ttys

Selection by list:
 -C <命令>            命令名称
 -G, --Group <GID>    real group id or name
 -g, --group <group>  session or effective group name
 -p, p, --pid <PID>   进程编号
        --ppid <PID>  父进程编号
 -q, q, --quick-pid <PID>
                      process id (quick mode)
 -s, --sid <session>  session id
 -t, t, --tty <tty>   终端
 -u, U, --user <UID>  effective user id or name
 -U, --User <UID>     真实用户编号或名称

  The selection options take as their argument either:
    a comma-separated list e.g. '-u root,nobody' or
    a blank-separated list e.g. '-p 123 4567'

输出格式：
 -F                   extra full
 -f                   完整格式，包含命令行
  f, --forest         ascii 字符艺术显示的进程树
 -H                   show process hierarchy
 -j                   jobs format
  j                   BSD 任务控制格式
 -l                   长格式
  l                   BSD 长格式
 -M, Z                添加安全数据（用于 SELinux）
 -O <format>          preloaded with default columns
  O <format>          as -O, with BSD personality
 -o, o, --format <格式>
                      用户定义的格式
  s                   信号格式
  u                   user-oriented format
  v                   虚拟内存格式
  X                   寄存器格式
 -y                   do not show flags, show rss vs. addr (used with -l)
     --context        显示安全上下文（用于 SELinux）
     --headers        repeat header lines, one per page
     --no-headers     do not print header at all
     --cols, --columns, --width <num>
                      set screen width
     --rows, --lines <num>
                      set screen height

Show threads:
  H                   as if they were processes
 -L                   possibly with LWP and NLWP columns
 -m, m                after processes
 -T                   possibly with SPID column

Miscellaneous options:
 -c                   show scheduling class with -l option
  c                   show true command name
  e                   show the environment after command
  k,    --sort        specify sort order as: [+|-]key[,[+|-]key[,...]]
  L                   show format specifiers
  n                   display numeric uid and wchan
  S,    --cumulative  include some dead child process data
 -y                   do not show flags, show rss (only with -l)
 -V, V, --version     display version information and exit
 -w, w                不限制输出宽度

android版本

• 线程显示-T
  注意linux显示线程是-L

实用场景

• 进程名称显示不全问题
  ps w或者ps x

• 查找进程的启动目录
  1.pwdx 进程id
  https://www.cnblogs.com/wangzy-Zj/p/12416278.html
  2.ll /proc/进程id/cwd
  https://www.cnblogs.com/wangzy-Zj/p/12416278.html
  https://www.cnblogs.com/exception1/p/14665407.html

• 打印进程号
  ps -ef | grep "name" | grep -v grep | awk '{print $2}'

• 打印父进程号
  ps axo pid,ppid | grep 1234

• 查看当前shell的进程
  ps -p $$

• 查看文件被哪些进程占用
  fuser
  https://www.coonote.com/linux/linux-cmd-fuser.html

• 查看进程的调用树图(查看子进程)
  pstree -p 进程号

• 查看特定进程的SELinux上下文
  ps -p PID -Z