Clear SQl server Logs by run xp_cmdshell

how i can clear sql server logs by run xp_cmdshell stored procedure.
(my user in sql server is a admin).
i don't want use enterprise manager . i want write a query and use at xp_cmdshell .
befor thx.What logs are you talking about... SQLServer has error logs that you can cycle, the server keeps 5 logs active.

Or for the Transaction logs, you can use TQL to backup the transaction logs and truncate.

But do you use the Transaction logs, ie are you using them for Disaster recovery or such...
You can also turn off the transaction logs or at least turn them down. This is done buy changeing the databases logging method from Full (All Transactions Logged), to Bulk (Only bulk loading transactions), or Simple (No Logging).

There are also artilcles on SQLServercentral.com and MSDN on useing TSQL to shrink the logs and reduce wasted space.

Remember that All enterprise manager is is a front end for TSQL Commands to the database, all commands can be run from code.