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Showing posts from 2008

MySQL and debian-sys-maint account

If for some reason your debian-sys-maint account is unset in MySQL, during MySQL start you will have connect to server error. You might need to set this account in the MySQL server itself. cat /etc/mysql/debian.cnf to get the password value from the file. Then connect to the DB mysql -u root -p and execute: GRANT ALL PRIVILEGES ON *.* TO 'debian-sys-maint'@'localhost' IDENTIFIED BY 'YOUR_PASSWORD' WITH GRANT OPTION

Changing time on CentOS

just copy relevant timezone file from /usr/share/zoneinfo to /etc/localtime like: cp /usr/share/zoneinfo/Europe/Moscow /etc/localtime

unix backup with tar and mt

Rewind tape drive: # mt -f /dev/st0 rewind Backup directory /www and /home with tar command (z - compressed): # tar -czf /dev/st0 /www /home Find out what block you are at with mt command: # mt -f /dev/st0 tell Display list of files on tape drive: # tar -tzf /dev/st0 Restore /www directory: # cd / # mt -f /dev/st0 rewind # tar -xzf /dev/st0 www Unload the tape: # mt -f /dev/st0 offline Display status information about the tape unit: # mt -f /dev/st0 status Erase the tape: # mt -f /dev/st0 erase You can go BACKWARD or FORWARD on tape with mt command itself: (a) Go to end of data: # mt -f /dev/nst0 eod (b) Goto previous record: # mt -f /dev/nst0 bsfm 1 (c) Forward record: # mt -f /dev/nst0 fsf 1

deleting message from postfix queue

To list the queue execute: mailq You can find the problematic messages id and the execute: find /var/spool/postfix -name "messegeID" | xargs rm

Keyboard shortcuts for Windows

Yes i know, it`s a UNIX blog. but sometimes we use M$ as well. http://support.microsoft.com/kb/126449