Linux ps -A and ps -ef

Linux ps (full spelling in English: process status) command is used to display the status of the current process, similar to the task manager of windows

ps -A | grep xx shows all processes of xx

ps -ef | grep xx displays all processes of xx in a terminal

Note that ef here can actually be disassembled to understand that e is to display all processes and f is to display all fields (UID, PPIP, C, STIME fields, these explanations can be seen in the screenshot below)

In fact, the display content of ps -Af and ps -ef is the same

So ps -A and ps -ef have the same effect and both display the process

In addition, to view the meaning of each field, you can use ps -ef to enter

 

UID: User ID, the owner of the process

PID: Process ID

PPID: parent process ID

C: Percentage of CPU used by the process

STIME: process start time

TTY: The terminal location of the login

TIME: CPU (computing) time used by the process

CMD: the command to invoke the process