Linux Commands

Ubuntu 8.10 command line

im a beginner with linux. i have just started using ubuntu 8.10.how can i learn more about using the command line and it's commands????????

Retrieving the 'SA' password

By mistake I deleted my SA account. Now I am unable to access the isql I had done. I know that if you have lost the 'SA' password, then you can regenerate another one. I followed the steps outlined in the SearchEnterpriseLinux ATE answer on the topic of regenerating an SA password. But nothing...

When do I use INIT?

when do I use INIT NOINIT when backing up transaction logs?