Centos7.4, openssh 7.4p1 upgrade openssh 7.8p1, sshd service restart failed. Please help me solve the problem, thank you. prompt： [root@xtjg-centos74 ~]# service sshd start Starting sshd (via systemctl): Job for sshd.service failed because a timeout was exceeded. See "systemctl status sshd.service" and "journalctl -xe" for details. [失败] [root@xtjg-centos74 ~]# systemctl status sshd.service ● sshd.service - OpenSSH server daemon Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled) Active: activating (auto-restart) (Result: timeout) since 五 2018-10-19 19:25:57 CST; 17s ago Docs: man:sshd(8) man:sshd_config(5) Process: 2182 ExecStart=/usr/sbin/sshd -D $OPTIONS (code=exited, status=0/SUCCESS) Main PID: 2182 (code=exited, status=0/SUCCESS) Tasks: 7 CGroup: /system.slice/sshd.service ├─1743 sshd: root@pts/0 ├─1745 -bash ├─1815 sshd: root@pts/1 ├─1817 -bash ├─2138 sshd: root@notty ├─2140 /usr/libexec/sftp-server └─2199 systemctl status sshd.service 10月 19 19:25:57 xtjg-centos74 systemd[1]: Failed to start OpenSSH server daemon. 10月 19 19:25:57 xtjg-centos74 systemd[1]: Unit sshd.service entered failed state. 10月 19 19:25:57 xtjg-centos74 systemd[1]: sshd.service failed. [root@xtjg-centos74 ~]# journalctl -xe 10月 19 19:23:44 xtjg-centos74 systemd[1]: sshd.service start operation timed out. Terminating. 10月 19 19:23:44 xtjg-centos74 sshd[2129]: Received signal 15; terminating. 10月 19 19:23:44 xtjg-centos74 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. 10月 19 19:23:44 xtjg-centos74 systemd[1]: Unit sshd.service entered failed state. 10月 19 19:23:44 xtjg-centos74 systemd[1]: sshd.service failed. 10月 19 19:23:44 xtjg-centos74 polkitd[785]: Unregistered Authentication Agent for unix-process:2163:163415 (system bus name :1.66, objec 10月 19 19:24:27 xtjg-centos74 systemd[1]: sshd.service holdoff time over, scheduling restart. 10月 19 19:24:27 xtjg-centos74 systemd[1]: Starting OpenSSH server daemon... -- Subject: Unit sshd.service has begun start-up -- Defined-By: systemd -- Support: http://lists.freedesktop.org/mailman/listinfo/systemd-devel -- -- Unit sshd.service has begun starting up. 10月 19 19:24:27 xtjg-centos74 sshd[2182]: Server listening on 0.0.0.0 port 22. 10月 19 19:24:27 xtjg-centos74 sshd[2182]: Server listening on :: port 22. 10月 19 19:25:57 xtjg-centos74 systemd[1]: sshd.service start operation timed out. Terminating. 10月 19 19:25:57 xtjg-centos74 sshd[2182]: Received signal 15; terminating. 10月 19 19:25:57 xtjg-centos74 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. 10月 19 19:25:57 xtjg-centos74 systemd[1]: Unit sshd.service entered failed state. 10月 19 19:25:57 xtjg-centos74 systemd[1]: sshd.service failed. [root@xtjg-centos74 ~]# sshd -T port 22 addressfamily any listenaddress [::]:22 listenaddress 0.0.0.0:22 logingracetime 120 x11displayoffset 10 maxauthtries 6 maxsessions 10 clientaliveinterval 0 clientalivecountmax 3 streamlocalbindmask 0177 permitrootlogin yes ignorerhosts yes ignoreuserknownhosts no hostbasedauthentication no hostbasedusesnamefrompacketonly no pubkeyauthentication yes passwordauthentication yes kbdinteractiveauthentication yes challengeresponseauthentication yes printmotd yes printlastlog yes x11forwarding no x11uselocalhost yes permittty yes permituserrc yes strictmodes yes tcpkeepalive yes permitemptypasswords no compression yes gatewayports no usedns no allowtcpforwarding yes allowagentforwarding yes disableforwarding no allowstreamlocalforwarding yes streamlocalbindunlink no fingerprinthash SHA256 exposeauthinfo no pidfile /var/run/sshd.pid xauthlocation /usr/bin/xauth ciphers chacha20-poly1305@openssh.com,aes128-ctr,aes192-ctr,aes256-ctr,aes128-gcm@openssh.com,aes256-gcm@openssh.com macs umac-64-etm@openssh.com,umac-128-etm@openssh.com,hmac-sha2-256-etm@openssh.com,hmac-sha2-512-etm@openssh.com,hmac-sha1-etm@openssh.com,umac-64@openssh.com,umac-128@openssh.com,hmac-sha2-256,hmac-sha2-512,hmac-sha1 banner none forcecommand none chrootdirectory none trustedusercakeys none revokedkeys none authorizedprincipalsfile none versionaddendum none authorizedkeyscommand none authorizedkeyscommanduser none authorizedprincipalscommand none authorizedprincipalscommanduser none hostkeyagent none kexalgorithms curve25519-sha256,curve25519-sha256@libssh.org,ecdh-sha2-nistp256,ecdh-sha2-nistp384,ecdh-sha2-nistp521,diffie-hellman-group-exchange-sha256,diffie-hellman-group16-sha512,diffie-hellman-group18-sha512,diffie-hellman-group14-sha256,diffie-hellman-group14-sha1 hostbasedacceptedkeytypes ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa hostkeyalgorithms ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa pubkeyacceptedkeytypes ecdsa-sha2-nistp256-cert-v01@openssh.com,ecdsa-sha2-nistp384-cert-v01@openssh.com,ecdsa-sha2-nistp521-cert-v01@openssh.com,ssh-ed25519-cert-v01@openssh.com,rsa-sha2-512-cert-v01@openssh.com,rsa-sha2-256-cert-v01@openssh.com,ssh-rsa-cert-v01@openssh.com,ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa rdomain none loglevel INFO syslogfacility AUTH authorizedkeysfile .ssh/authorized_keys hostkey /etc/ssh/ssh_host_rsa_key hostkey /etc/ssh/ssh_host_ecdsa_key hostkey /etc/ssh/ssh_host_ed25519_key authenticationmethods any subsystem sftp /usr/libexec/sftp-server maxstartups 10:30:100 permittunnel no ipqos af21 cs1 rekeylimit 0 0 permitopen any permitlisten any permituserenvironment no [root@xtjg-centos74 ~]#
This looks like a configuration problem between systemd and sshd. sshd is starting up normally, but systemd is killing it moments later. I'd check that your systemd configuration is correctly detecting sshd's startup. I'll close this bug, but please use the openssh-unix-dev@ mailing list for configuration problems like this. https://www.openssh.com/report.html
Move resolved bugs -> CLOSED after 8.0 release