ssh 远程执行 yum update,然后网络不大好断了,关掉 putty,这时 update 还在继续么? - V2EX
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laoyuan
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ssh 远程执行 yum update,然后网络不大好断了,关掉 putty,这时 update 还在继续么?

  •  
  •   laoyuan
    laoyuan Dec 30, 2014 3906 views
    This topic created in 4138 days ago, the information mentioned may be changed or developed.
    确切的说执行的是 yum --enablerepo=remi,remi-test update
    8 replies    2014-12-31 16:15:48 +08:00
    vietor
        1
    vietor  
       Dec 30, 2014 via Android
    screen
    ylhawj
        2
    ylhawj  
       Dec 30, 2014   1
    如果木有用screen,tmux之类的东东,那就断了。
    phoneli
        3
    phoneli  
       Dec 30, 2014
    我习惯使用tmux。
    duzhe0
        4
    duzhe0  
       Dec 30, 2014   5
    linux的进程管理中有一个会话(session)的概念。一个会话包含一个或 多个进程组,每个进程组包含一个名多个进程。有些会话会绑定一个终端,反过来看, 我们每一个putty的连接都会关联一个会话, shell是这个session的会话首进程。当终端断开连接时,终端的驱动会给会话首进程发送一个SIGHUP信号。当会话首进程退出后,内核会给该会话中的所有进程发送一个SIGHUP信号。SIGHUP信号默认的处理行为是终止进程。如果你的程序没有处理SIGHUP,直接关闭终端会导致该终端上运行的进程退出。

    yum会不会退出, 得看yum有没有处理SIGHUP信号。yum是一个交互式的程序,所以我猜它应该没有处理SIGHUP。
    MozzieCN
        5
    MozzieCN  
       Dec 31, 2014   1
    nohup yum update &
    lightryanking
        6
    lightryanking  
       Dec 31, 2014 via iPhone
    建议改用xshell
    laoyuan
        7
    laoyuan  
    OP
       Dec 31, 2014
    @MozzieCN 我执行php cli 模式就用 nohup,不过一直不知道后边的 & 是什么意思
    hiboshi
        8
    hiboshi  
       Dec 31, 2014
    @laoyuan &是后台执行
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