Release hold queue email in Postfix – postsuper
The postsuper command controls different types of queues in the Postfix mail system, like the deferred or hold queue. This post shows you some Postfix queue operations to maintain your mail servers.
Category GNU/Linux
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Restore single MySQL table from a full mysqldump backup file
Learn how to restore a single table from a full MySQL mysqldump backup file using Bash shell in Linux
MySQL InnoDB performance improvement: InnoDB buffer pool instances – Updated!
Are you running into MySQL load problems? InnoDB Buffer Pool optimization is an important step in tuning MySQL servers for a heavy InnoDB workload. Configuring innodb_buffer_pool_instances and increase read/write I/O threads. Dividing the InnoDB buffer pool into multiple instances can improve Disk I/O. And by doing so, you run your database & server more efficiently and faster. Here is a little help for you.
Turn off swap
Learn how to turn off swap in Bash, because when a swap partition is enabled Linux starts swapping, which may degrade (MySQL) system performance
Convert decimal to hex in Bash, hexadecimal to decimal and dates to Unix timestamp
Cconvert decimal to hex hexadecimal to decimal and Unix timestamps in Linux Bash. A quicky for my archives.
Delete all MAILER-DAEMON emails in Postfix queue
How to delete all MAILER-DAEMON emails from your Postfix queue, when it matches a sender or recipient email address condition. In Postfix, there are various similar commands to delete messages from the Postfix mail queue, based on the Message-ID and/or email address for example...
Bash: Grep through a large number of files – “Argument list too long”
/bash/grep and /bash/rm give me an error Argument list too long. Here is how to overcome this error with Bash grep and rm.