Technology

A quick reference for the most common bash shell redirect operators, with examples showing how to send stdout and stderr to files or swap them.

A quick bash workflow for running integrity checks and generating SQL dumps across a set of user databases in MySQL.

A quick one-liner to list every mounted ext3 or ext4 partition along with its label and filesystem state, useful for spotting unclean shutdowns or journal issues at a glance.

A quick way to inspect what SELECT and UPDATE privileges a MySQL user actually holds, straight from the mysql.user table. Useful when an application is throwing permission errors and you need to confirm what the account can and cannot do.

A quick walkthrough of using virt-rescue to generate the correct mount commands for a chroot rescue session on a libvirt guest.

Learn how to extract dynamic symbols from the mysqld binary and use them to resolve a crash stack dump into readable function names.