我对 Linux 还不够熟悉，无法独自处理这个问题。
我今天将我的 dist 升级到了 Debian 9.3。升级过程中，SSH 服务器无法启动
Setting up openssh-server (1:7.4p1-10+deb9u2) ...
Job for ssh.service failed because the control process exited with error code.
See "systemctl status ssh.service" and "journalctl -xe" for details.
invoke-rc.d: initscript ssh, action "restart" failed.
● ssh.service - OpenBSD Secure Shell server
Loaded: loaded (/lib/systemd/system/ssh.service; enabled; vendor preset: enabled)
Active: failed (Result: exit-code) since Thu 2017-12-14 10:38:19 CET; 4ms ago
Process: 13714 ExecStart=/usr/sbin/sshd -D $SSHD_OPTS (code=exited, status=255)
Process: 13712 ExecStartPre=/usr/sbin/sshd -t (code=exited, status=0/SUCCESS)
Main PID: 13714 (code=exited, status=255)
Tasks: 3 (limit: 4915)
CGroup: /system.slice/ssh.service
└─771 /usr/sbin/sshd
Dec 14 10:38:19 hostname systemd[1]: Starting OpenBSD Secure Shell server...
Dec 14 10:38:19 hostname systemd[1]: ssh.service: Main process exited, co…n/a
Dec 14 10:38:19 hostname systemd[1]: Failed to start OpenBSD Secure Shell…er.
Dec 14 10:38:19 hostname systemd[1]: ssh.service: Unit entered failed state.
Dec 14 10:38:19 hostname systemd[1]: ssh.service: Failed with result 'exi…e'.
Hint: Some lines were ellipsized, use -l to show in full.
dpkg: error processing package openssh-server (--configure):
subprocess installed post-installation script returned error exit status 1
Errors were encountered while processing:
openssh-server
我跑sshd -T
port 22
addressfamily any
listenaddress [::]:22
listenaddress 0.0.0.0:22
usepam yes
logingracetime 120
x11displayoffset 10
maxauthtries 6
maxsessions 10
clientaliveinterval 0
clientalivecountmax 3
streamlocalbindmask 0177
permitrootlogin without-password
ignorerhosts yes
ignoreuserknownhosts no
hostbasedauthentication no
hostbasedusesnamefrompacketonly no
pubkeyauthentication yes
kerberosauthentication no
kerberosorlocalpasswd yes
kerberosticketcleanup yes
gssapiauthentication no
gssapikeyexchange no
gssapicleanupcredentials yes
gssapistrictacceptorcheck yes
gssapistorecredentialsonrekey no
passwordauthentication yes
kbdinteractiveauthentication no
challengeresponseauthentication no
printmotd no
printlastlog yes
x11forwarding yes
x11uselocalhost yes
permittty yes
permituserrc yes
strictmodes yes
tcpkeepalive yes
permitemptypasswords no
permituserenvironment no
compression yes
gatewayports no
usedns no
allowtcpforwarding yes
allowagentforwarding yes
disableforwarding no
allowstreamlocalforwarding yes
streamlocalbindunlink no
useprivilegeseparation sandbox
fingerprinthash SHA256
pidfile /run/sshd.pid
xauthlocation /usr/bin/xauth
ciphers [email protected],aes128-ctr,aes192-ctr,aes256-ctr,[email protected],[email protected]
macs [email protected],[email protected],[email protected],[email protected],[email protected],[email protected],[email protected],hmac-sha2-256,hmac-sha2-512,hmac-sha1
versionaddendum none
kexalgorithms curve25519-sha256,[email protected],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 [email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
hostkeyalgorithms [email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
pubkeyacceptedkeytypes [email protected],[email protected],[email protected],[email protected],[email protected],ecdsa-sha2-nistp256,ecdsa-sha2-nistp384,ecdsa-sha2-nistp521,ssh-ed25519,rsa-sha2-512,rsa-sha2-256,ssh-rsa
loglevel INFO
syslogfacility AUTH
authorizedkeysfile .ssh/authorized_keys .ssh/authorized_keys2
hostkey /etc/ssh/ssh_host_rsa_key
hostkey /etc/ssh/ssh_host_ecdsa_key
hostkey /etc/ssh/ssh_host_ed25519_key
acceptenv LANG
acceptenv LC_*
authenticationmethods any
subsystem sftp /usr/lib/openssh/sftp-server
maxstartups 10:30:100
permittunnel no
ipqos lowdelay throughput
rekeylimit 0 0
permitopen any
我将非常感激任何深入研究该问题的建议，包括理解该问题的解释。
答案1
/var/log/deamon.log什么都没显示。调用/usr/sbin/sshd -d显示端口已被使用。我无法停止服务 - 我不知道为什么。我重新启动了系统，现在一切正常。