Linux遠程服務器無法登錄的解決方法

本篇文章給大家分享的是有關Linux遠程服務器無法登錄的解決方法，小編覺得挺實用的，因此分享給大家學習，希望大家閱讀完這篇文章后可以有所收獲，話不多說，跟著小編一起來看看吧。

1.問題說明

Linux遠程服務器突然無法SSH登錄了，

登陸報錯：

ssh_exchange_identification: read: Connection reset by peer。

2.問題原因

var目錄的權限不正確

3.解決辦法

將SSH相關文件的權限改回來，確保權限為755，屬主為root:root。

這里可以使用vps服務器的svn功能，進行登錄系統，vps提供商都會提供vnc登錄功能。

3.1.查看sshd狀態

service sshd status

Redirecting to /bin/systemctl status sshd.service
● sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
   Active: active (running) since 二 2019-04-09 23:36:09 CST; 18h ago
     Docs: man:sshd(8)
           man:sshd_config(5)
  Process: 1357 ExecStart=/usr/sbin/sshd $OPTIONS (code=exited, status=0/SUCCESS)
 Main PID: 1358 (sshd)
   CGroup: /system.slice/sshd.service
           ├─ 1358 /usr/sbin/sshd
           ├─20443 sshd: root@pts/1
           ├─20445 sshd: root@notty
           ├─20447 /usr/libexec/openssh/sftp-server
           ├─20594 -bash
           ├─23794 sshd: mysql [priv]
           ├─23796 sshd: mysql@pts/0
           ├─23797 sshd: mysql [priv]
           ├─23799 sshd: mysql@notty
           ├─23800 /usr/libexec/openssh/sftp-server
           ├─23991 -bash
           ├─25381 vim /etc/init.d/mysqld
           └─25739 /bin/systemctl status sshd.service
           
4月 10 17:59:47 dap229-156 sshd[21516]: pam_unix(sshd:session): session closed for user mysql
4月 10 18:00:05 dap229-156 sshd[23794]: Accepted password for mysql from 10.43.163.30 port 54797 ssh3
4月 10 18:00:05 dap229-156 sshd[23794]: pam_unix(sshd:session): session opened for user mysql by (uid=0)
4月 10 18:00:05 dap229-156 sshd[23797]: Accepted password for mysql from 10.43.163.30 port 54798 ssh3
4月 10 18:00:05 dap229-156 sshd[23797]: pam_unix(sshd:session): session opened for user mysql by (uid=0)
4月 10 18:26:00 dap229-156 sshd[25579]: fatal: /var/empty/sshd must be owned by root and not group or world-writable.
4月 10 18:26:12 dap229-156 sshd[25580]: fatal: /var/empty/sshd must be owned by root and not group or world-writable.
4月 10 18:26:29 dap229-156 sshd[25581]: fatal: /var/empty/sshd must be owned by root and not group or world-writable.
4月 10 18:26:46 dap229-156 sshd[25590]: fatal: /var/empty/sshd must be owned by root and not group or world-writable.
4月 10 18:30:11 dap229-156 sshd[25622]: fatal: /var/empty/sshd must be owned by root and not group or world-writable.

3.2.修復文件權限

chmod 755 /var/empty/sshd

如果屬主不對，還需要修改屬主：

chown root:root /var/empty/sshd

3.3.重啟sshd服務

service sshd restart

3.4.再次查看sshd狀態

service sshd status

Redirecting to /bin/systemctl status sshd.service
● sshd.service - OpenSSH server daemon
   Loaded: loaded (/usr/lib/systemd/system/sshd.service; enabled; vendor preset: enabled)
   Active: active (running) since 三 2019-04-10 18:35:01 CST; 3s ago
     Docs: man:sshd(8)
           man:sshd_config(5)
  Process: 25768 ExecStart=/usr/sbin/sshd $OPTIONS (code=exited, status=0/SUCCESS)
 Main PID: 25769 (sshd)
   CGroup: /system.slice/sshd.service
           ├─20443 sshd: root@pts/1
           ├─20445 sshd: root@notty
           ├─20447 /usr/libexec/openssh/sftp-server
           ├─20594 -bash
           ├─23794 sshd: mysql [priv]
           ├─23796 sshd: mysql@pts/0
           ├─23797 sshd: mysql [priv]
           ├─23799 sshd: mysql@notty
           ├─23800 /usr/libexec/openssh/sftp-server
           ├─23991 -bash
           ├─25381 vim /etc/init.d/mysqld
           ├─25769 /usr/sbin/sshd
           └─25770 /bin/systemctl status sshd.service
 
4月 10 18:35:01 dap229-156 systemd[1]: Starting OpenSSH server daemon...
4月 10 18:35:01 dap229-156 systemd[1]: PID file /var/run/sshd.pid not readable (yet?) after start.
4月 10 18:35:01 dap229-156 sshd[25769]: Server listening on 0.0.0.0 port 22.
4月 10 18:35:01 dap229-156 sshd[25769]: Server listening on :: port 22.
4月 10 18:35:01 dap229-156 systemd[1]: Started OpenSSH server daemon.

這個時候檢查沒有錯誤了，服務器可以SSH登錄了，

以上就是Linux遠程服務器無法登錄的解決方法，小編相信有部分知識點可能是我們日常工作會見到或用到的。希望你能通過這篇文章學到更多知識。更多詳情敬請關注億速云行業資訊頻道。