Zombie vs Defunct进程？

Question

僵尸和失效进程之间有区别吗？我找到了维基百科的文章,写的是这两个是相同的.在这种情况下,为什么需要为同一个过程提供2个不同的术语:

https://en.wikipedia.org/wiki/Zombie_process

Answer 1

对于Linux,"defunct"和"zombie"进程是相同的.

来自man ps:

标记<defunct>的进程是死进程(所谓的"僵尸"),因为它们的父进程没有正确地销毁它们.如果父进程退出,则init(8)将销毁这些进程.

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 by job control signal
    t    stopped by debugger during the tracing
    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