LiveCD 開啓SSH服務

 LiveCD 開啓SSH服務

 1.設置IP地址 

# ip addr add 192.168.219.130/24 dev eth0
# ip a

 2.爲root設置密碼

# passwd root

3.開啓ssh服務 

# find / -name 'sshd'
# /usr/sbin/sshd -f /etc/ssh/sshd_config
ERROR "Missing privilege separation directory: /var/lib/sshd"
# mkdir -pv /var/lib/sshd
# /usr/sbin/sshd -f /etc/ssh/sshd_config
# ps aux |grep [s]shd

 4.通過Xmanager連接,出現如下錯誤 

"WARNING! The remote SSH server rejected X11 forwarding request."

5.經查日誌，獲取如下錯誤信息 

error: openpty: No such file or directory
error: session_pty_req: session 0 alloc failed

 6.查看/dev/ptmx和/dev/pts是否存在,以及ptmx的權限是否正確 

#ls -l `find /dev/ -name 'ptmx'`
crw-rw-rw- 1 root tty 5, 2  5月  5 14:46 /dev/ptmx
#find /dev/ -name 'pts'

7.查看/etc/fstab 

# cat /etc/fstab
none         /proc    proc    defaults          0 0
sysfs        /sys     sysfs   defaults          0 0
devpts       /dev/pts devpts  gid=4,mode=620    0 0
tmpfs        /dev/shm tmpfs   defaults          0 0

 8.mount /dev/pts

連接ssh成功,執行umount -l /dev/pts後
"WARNING! The remote SSH server rejected X11 forwarding request."
錯誤重現，無法通過ssh連接服務器，錯誤日誌如下
error: openpty: No such file or directory
error: session_pty_req: session 0 alloc failed