how to recover the serever from a rm -rf
 

the commands which i executed are
cd /
rm -rf *
how can i recover from this
when i restarted the server it went in grub mode

Restore the system from the last full tested backup. After that ask a senior to change the root password on the machine and configure the appropriate sudo entries for you.

In case you don't have a backup, testdisk can recover deleted files in many cases.

..or Photorec. And this may sound harsh but in case you don't have a backup now you know why you should have. Besides, some people just have to learn not to fat finger stuff or think about what they do (what's a reboot gonna fix?) the hard way.

cd /
rm -rf *

... is one helluva "fat finger"!

Yeah, you're right. I'm just trying not to be rude about it.

Oh, it can indeed be a "fat finger." I once watched someone starting to type, "rm -rf /*something", got as far as "rm -rf /*", then thought better of it and reached for the backspace key. Those oversized, backward "L" shaped <enter> keys come up awfully close to the backspace key.

typing while NOT watching what is being typed

hitting the darn < space> bar after the / will do it every time
darn that thumb it will get you every time:doh::cry: