Add cronjob using shell script

have your script ...

a. crontab -l > $tmpfile
b. edit $tmpfile
c. crontab $tmpfile
d. rm $tmpfile

Increase trial period of windows 2008 server - rearm

Sometimes we setup server for learning platform, software. Since license cost of all products are so high we cannot afford and so we use trial version.
To extend trial version Windows 2008 Server by executing below command as Administrator on server.

1. Start > Run > type "cmd"
2. Right click cmd, Run as Administrator
3. Execute on command prompt : slmgr.vbs -dli --- this will show the number of days left with trial version.
4. Execute on command prompt slmgr.vbs -rearm
5. Restart Server
6. Repeat step 1,2,3 to check new date of expiration of trial version.