ps列中的STAT值是什么意思？
在ps的STAT列中，有一堆字母并没有多大意义。 他们的意思是什么？
这是ps aux | head的一个例子 ps aux | head ：
USER PID %CPU %MEM VSZ RSS TTY STAT START TIME COMMAND root 1 0.0 0.0 27176 2960 ? Ss Sep20 0:02 /sbin/init root 2 0.0 0.0 0 0 ? S Sep20 0:00 [kthreadd] root 3 0.0 0.0 0 0 ? S Sep20 13:05 [ksoftirqd/0] root 5 0.0 0.0 0 0 ? S< Sep20 0:00 [kworker/0:0H] root 7 0.0 0.0 0 0 ? S< Sep20 0:00 [kworker/u:0H] root 8 0.0 0.0 0 0 ? S Sep20 2:16 [migration/0] root 9 0.0 0.0 0 0 ? S Sep20 0:00 [rcu_bh] root 10 0.0 0.0 0 0 ? S Sep20 20:08 [rcu_sched] root 11 0.0 0.0 0 0 ? S Sep20 0:07 [watchdog/0] root 12 0.0 0.0 0 0 ? S Sep20 0:05 [watchdog/1] root 13 0.0 0.0 0 0 ? S Sep20 2:21 [ksoftirqd/1] root 14 0.0 0.0 0 0 ? S Sep20 1:00 [migration/1]
man ps拥有所有答案，在“PROCESS STATE CODES”标题下：
PROCESS STATE CODES Here are the different values that the s, stat and state output specifiers (header "STAT" or "S") will display to describe the state of a process: D uninterruptible sleep (usually IO) R running or runnable (on run queue) S interruptible sleep (waiting for an event to complete) T stopped, either by a job control signal or because it is being traced. W paging (not valid since the 2.6.xx kernel) X dead (should never be seen) Z defunct ("zombie") process, terminated but not reaped by its parent. For BSD formats and when the stat keyword is used, additional characters may be displayed: < high-priority (not nice to other users) N low-priority (nice to other users) L has pages locked into memory (for real-time and custom IO) s is a session leader l is multi-threaded (using CLONE_THREAD, like NPTL pthreads do) + is in the foreground process group.