sshd出現了周期性連不上的情況,查看日志如下:
/var/log/secure:
sshd[3170]: Server listening on 0.0.0.0 port 22. sshd[3170]: Received signal 15; terminating.
/var/log/messages:
systemd: sshd.service holdoff time over, scheduling restart. systemd: Starting OpenSSH server daemon... systemd: sshd.service start operation timed out. Terminating. systemd: Failed to start OpenSSH server daemon. systemd: Unit sshd.service entered failed state. systemd: sshd.service failed. systemd: sshd.service holdoff time over, scheduling restart. systemd: Starting OpenSSH server daemon... systemd: sshd.service start operation timed out. Terminating. systemd: Failed to start OpenSSH server daemon. systemd: Unit sshd.service entered failed state. systemd: sshd.service failed. systemd: sshd.service holdoff time over, scheduling restart. systemd: Starting OpenSSH server daemon... systemd: sshd.service start operation timed out. Terminating. systemd: Failed to start OpenSSH server daemon. systemd: Unit sshd.service entered failed state. systemd: sshd.service failed.
journalctl -xe:
sshd.service start operation timed out. Terminating. sshd[8425]: Received signal 15; terminating. systemd[1]: Failed to start OpenSSH server daemon. -- Subject: Unit sshd.service has failed -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit sshd.service has failed. -- -- The result is failed. systemd[1]: Unit sshd.service entered failed state. systemd[1]: sshd.service failed. polkitd[457]: Unregistered Authentication Agent for unix-process:8419:67059806 (system bus name :1.2658, object path /org/freedesktop/PolicyKit1/AuthenticationAgent, locale en_US.UTF-8) (disconnected from bus)
以上就是報錯信息,完全找不到原因在哪里, sshd -t 也沒有任何輸出
無奈只能選擇重裝opendssh
yum remove openssh yum install openssh openssh-server openssh-clients service sshd start (systemctl start sshd)
重裝之后就好了,沒有再出現進程被殺死的情況