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vps是3个人合租共用的,不知道谁操作了什么导致ssh启动失败,一直连接不上刚开始以为系统坏了呢,后面通过vps终端登陆上去发现ssh服务没在运行,于是尝试运行sshd发现出现如下错误:
starting sshd:
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ warning: unprotected private key file! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
permissions 0777 for ‘/etc/ssh/ssh_host_rsa_key’ are too open.
it is recommended that your private key files are not accessible by others.
this private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_rsa_key
could not load host key: /etc/ssh/ssh_host_rsa_key
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
@ warning: unprotected private key file! @
@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
permissions 0777 for ‘/etc/ssh/ssh_host_dsa_key’ are too open.
it is recommended that your private key files are not accessible by others.
this private key will be ignored.
bad permissions: ignore key: /etc/ssh/ssh_host_dsa_key
could not load host key: /etc/ssh/ssh_host_dsa_key
disabling protocol version 2. could not load host key
sshd: no hostkeys available — exiting.
[failed]
解决方法:
#chmod 600 sshd_config ssh_host_dsa_key ssh_host_key ssh_host_rsa_key
#chmod 620 moduli
#chmod 644 ssh_config ssh_host_dsa_key.pub ssh_host_key.pub ssh_host_rsa_key.pub
#service sshd start
再次出现如下错误:
[root@bailongjun ssh]# service sshd restart
stopping sshd: [failed]
starting sshd: /var/empty/sshd must be owned by root and not group or world-writable.
[failed]
在终端上直接登录,问题显示如下:
/var/empty/sshd must be owned by root and not group or world-writable.
问题:
linux上的ssh无法启动
报告/var/empty/sshd must be owned by root and not group or world-writable.
解决办法:
首先通过物理终端进入到linux上,手工检查ssh发现没运行
-bash-2.05b# /etc/init.d/sshd status
sshd is stopped
手工启动服务,发现报告权限错误。
-bash-2.05b# /etc/init.d/sshd start
starting sshd:/var/empty/sshd must be owned by root and not group or world-writable.
[failed]
-bash-2.05b#
使用rpm -v 命令可检查到ssh的软件包正常,但某个目录的属主错误。
-bash-2.05b# rpm -v openssh-server
s.5….. c /etc/ssh/sshd_config
…..u.. /var/empty/sshd
-bash-2.05b#
经查看发现这个目录的属主不是root,所以启动ssh报错
-bash-2.05b# ls -ld /var/empty/sshd/
d–x–x–x 2 vu00106 root 1024 feb 2 2005 /var/empty/sshd/
-bash-2.05b#
修改为root属主,启动成功
-bash-2.05b# chown root /var/empty/sshd/
-bash-2.05b# /etc/init.d/sshd start
starting sshd: [ ok ]
-bash-2.05b#
至此问题修复。
另外,还可以尝试:
这个是权限的问题
可采取以下两步解决
chown -r root.root /var/empty/sshd
chmod 744 /var/empty/sshd
service sshd restart
就可以解决上述的问题。