☰

通过端口号查找进程id

tag-icon • tag-icon fedora process dovecot lsof
通过端口号查找进程id

我正在尝试（目前收效甚微）在我的 Fedora 24 服务器上设置 Dovecot 邮件服务器。我已经安装了 Dovecot 并设置了conf文件，一切都很好。但是当我跑步时：

systemctl restart dovecot

编辑conf文件后我收到这条消息

Job for dovecot.service failed because the control process exited with error code. See "systemctl status dovecot.service" and "journalctl -xe" for details

运行systemctl status dovecot.service给了我一个不同的错误

[root@fedora app]# systemctl status dovecot.service
● dovecot.service - Dovecot IMAP/POP3 email server
   Loaded: loaded (/usr/lib/systemd/system/dovecot.service; disabled; vendor preset: disabled)
   Active: failed (Result: exit-code) since Tue 2016-08-16 15:02:30 UTC; 37min ago
     Docs: man:dovecot(1)
           http://wiki2.dovecot.org/
  Process: 11293 ExecStart=/usr/sbin/dovecot (code=exited, status=89)
  Process: 11285 ExecStartPre=/usr/libexec/dovecot/prestartscript (code=exited, status=0/SUCCESS)

Aug 16 15:02:30 fedora dovecot[11293]: Error: service(imap-login): listen(*, 993) failed: Address already in use
Aug 16 15:02:30 fedora dovecot[11293]: master: Error: service(imap-login): listen(*, 993) failed: Address already in use
Aug 16 15:02:30 fedora dovecot[11293]: Error: service(imap-login): listen(::, 993) failed: Address already in use
Aug 16 15:02:30 fedora dovecot[11293]: master: Error: service(imap-login): listen(::, 993) failed: Address already in use
Aug 16 15:02:30 fedora dovecot[11293]: Fatal: Failed to start listeners
Aug 16 15:02:30 fedora dovecot[11293]: master: Fatal: Failed to start listeners
Aug 16 15:02:30 fedora systemd[1]: dovecot.service: Control process exited, code=exited status=89
Aug 16 15:02:30 fedora systemd[1]: Failed to start Dovecot IMAP/POP3 email server.
Aug 16 15:02:30 fedora systemd[1]: dovecot.service: Unit entered failed state.
Aug 16 15:02:30 fedora systemd[1]: dovecot.service: Failed with result 'exit-code'.

我尝试运行lsof -i | grep 993，但这不会产生任何进程。知道如何解决这个问题吗？

答案1

netstat当您尝试解决许多与网络相关的问题时，它是您的朋友。要找到侦听端口，我会使用netstat -tulpn | grep :<port number>

例如，要查找哪些 pid 正在端口 22 上侦听，我将运行：

netstat -tulpn | grep :22
tcp  0  0 0.0.0.0:22    0.0.0.0:*    LISTEN      3062/sshd

这告诉我 pid 3062 的 sshd 正在侦听端口 22。

答案2

ss您可能还喜欢使用比 grep 端口号更系统、更精确的解决方案。

# ss -t -l 'sport = 22'
State      Recv-Q Send-Q Local Address:Port                 Peer Address:Port
LISTEN     0      128        *:ssh                      *:*
LISTEN     0      128       :::ssh                     :::*

相关内容