SysAdmin

A quick awk one-liner that pulls RPM package URLs from log files or package lists by matching lines containing both ‘autoinstall’ and ‘.rpm’.

A quick bash script to identify and repair MySQL tables with invalid or corrupted MYI key files, then force a rebuild using USE_FRM.

Learn how to configure MySQL’s log_output variable to write slow query and general logs to files instead of tables, and why that matters for performance and log management.

A quick reference for running a forced, verbose ext filesystem check with automatic repairs and timestamped logging.

Tuning Galera’s gcache size and page size can reduce disk I/O during replication and keep write-set lookups in memory. A quick configuration change that pays off on busy clusters.

A compact Perl one-liner that produces cryptographically random passwords of a specified length. Perfect for quickly generating strong credentials without reaching for a dedicated tool.