1. Go to the ESXi console and press alt+F1
2. Type: unsupported
3. Enter the root password(No prompt, typing is blindly)
4. At the prompt type “vi /etc/inetd.conf”
5. Look for the line that starts with “#ssh” (you can search with pressing “/”)
6. Remove the “#” (press the “x” if the cursor is on the character)
7. Save “/etc/inetd.conf” by typing “:wq!”
8. Restart the management service “/sbin/services.sh restart”

用下面的方法可以避免重新启动机器

8. Restart the management service “/sbin/services.sh restart”
10 – Kill inetd : kill `ps | grep inetd | cut -f2 -d” “‘
11 – Start inetd: inetd

参考：VMWare KB: Tech Support Mode for Emergency Support