Meanings of Process List symbols in Linux Learning

The meaning of the Process List symbol in Linux learning can be displayed by entering ps and other commands on a simulated Linux terminal. The following describes the meanings of the symbols corresponding to some common process lists: UID: the user responsible for starting the process; PID: the ID of the process; PPID: PID of the parent process (if a process is started by another process); USER: USER Name of the process owner; C: processor utilization during process duration; STIME: system time when the process is started; TTY: terminal Device from which the process starts; CMD: name of the Startup Program; F: system identifier assigned to the process by the kernel; S: Process status (O (TASK_OPERATING) = running on the processor, that is, the running state; S (TASK_INTERRUPTIBLE) = sleep, that is, the blocking state; R (TASK_RUNNING) = runable, waiting for running, that is, the ready state; Z (TASK_DEAD-EXIT_ZOMBIE) = dead process, the process has been terminated, and the parent process is unavailable, that is, the exit state; T (TASK_STOPPED or TASK_TRACED) = paused or tracked) PRI: the priority of the process (the greater the number, the lower the priority ); NI: nice value is used to determine the priority; ADDR: Memory Address of the process; SZ: swap space required by the process; WCHAN: Address of the kernel function of the Process during sleep; VSZ: size of the Process in memory, in KB; RSS: physical memory used by the process and not swapped out; STAT: Status Code consisting of two characters, used to indicate the status of the current process; VIRT: Total virtual memory used by the process; SHR: memory shared by the process and other processes; % CPU: CPU time used by the process; % MEM: percentage of available physical memory that the process is using; TIME +: total cpu time used after the process starts; COMMAND: COMMAND line name of the process (started program );