can not connect linux via putty

yes you are right i,m getting failed when i try to run service sshd restart, any idea how to fix it ?

Did you run the command as root? If you didn't try

sudo service sshd restart

What do you get with "service sshd status" (or "sudo service ...")?

You can check for errors in /var/log/auth.log (or whatever log is configured for the "AUTH" facility, if any) , or you can try to start sshd from the commandlne in order to get some info

/usr/sbin/sshd -e

Note that sshd will process just one connection when started with "-e", but will display error messages (if any) on the terminal.

In all cases, use "sudo ..." if you're not root.

yes i can login before just in recent day can not login, will try the above method tonight !

So you cannot restart sshd? Can you post the error here?

When you try the restart, how are you logged on to the linux machine?

C--Users-piaakit-Desktop-error.jpg

Any idea ?