Linux基础03-进程管理

终端分为 tty1-tty7

　　tty1-tty6是设备终端

　　tty7是桌面用户的终端

ps -a ——列出当前用户信息

sailfish@DESKTOP-GSV91L5:~$ ps -a
  PID TTY          TIME CMD
    4 tty1     00:00:00 bash
 5031 pts/0    00:00:00 ps

ps -au——详细信息

sailfish@DESKTOP-GSV91L5:~$ ps -au
USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         3  0.0  0.0   8304    92 tty1     Ss   09:22   0:00 /init ro
sailfish     4  0.0  0.0  17048  3712 tty1     S    09:22   0:00 -bash
sailfish  5014  0.0  0.0  16784  3424 pts/0    Ss   10:03   0:00 -bash
sailfish  5032  0.0  0.0  17380  1912 pts/0    R    10:11   0:00 ps -au

　　PID——启动程序的进程ID

　　tty——终端

ps -aux——查看没有终端的程序

USER       PID %CPU %MEM    VSZ   RSS TTY      STAT START   TIME COMMAND
root         1  0.0  0.0   8304   132 ?        Ss   09:22   0:00 /init ro
root         3  0.0  0.0   8304    92 tty1     Ss   09:22   0:00 /init ro
sailfish     4  0.0  0.0  17048  3712 tty1     S    09:22   0:00 -bash
root      4940  0.0  0.0  19464   948 ?        Ss   10:03   0:00 /usr/sbin/sshd
root      4943  0.0  0.0  20228  4128 ?        Ss   10:03   0:00 sshd: sailfish [pr
sailfish  5013  0.0  0.0  20496  2124 ?        R    10:03   0:00 sshd: sailfish@pts
sailfish  5014  0.0  0.0  16784  3424 pts/0    Ss   10:03   0:00 -bash
sailfish  5033  0.0  0.0  17648  2040 pts/0    R    10:13   0:00 ps -aux

 kil 指令

　　kill -9 进程id

　　kill -SIGKILL 进程id

查看当前进程的环境变量——env

sailfish@DESKTOP-GSV91L5:~$ 
SSH_CONNECTION=192.168.0.105 50466 192.168.0.105 22
LESSCLOSE=/usr/bin/lesspipe %s %s
LANG=C.UTF-8
DISPLAY=localhost:10.0
USER=sailfish
PWD=/home/sailfish
HOME=/home/sailfish
SSH_CLIENT=192.168.0.105 50466 22
XDG_DATA_DIRS=/usr/local/share:/usr/share:/var/lib/snapd/desktop
SSH_TTY=/dev/pts/0
MAIL=/var/mail/sailfish
TERM=xterm
SHELL=/bin/bash
SHLVL=1
LOGNAME=sailfish
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin
LESSOPEN=| /usr/bin/lesspipe %s
_=/usr/bin/env

env | grep PATH

sailfish@DESKTOP-GSV91L5:~$ env | grep PATH
PATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/usr/games:/usr/local/games:/snap/bin

 　　PATH  key:vual

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