Essential Linux System Administration Techniques

Regular Expressions Regular expressions enable pattern matching across data streams using wildcards, metacharacters, and keywords to identify and extract specific information. Two primary syntax standards exist: Basic Regular Expressions (BRE) and Extended Regular Expressions (ERE). The key difference lies in metacharacter handling—ERE requires ...

Posted on Sat, 16 May 2026 06:18:24 +0000 by angershallreign

Restoring a Degraded RAID 5 Array with MegaCLI

1. Physical Drive InventoryTo recover a RAID 5 configuration after a disk failure or hardware relocation, execute the following command to list the status of all physical drives attached to Adapter 0. Ensure that application I/O is halted during this process to prevent data corruption.MegaCli -PDList -a02. Identifying the Failed DriveScan the o ...

Posted on Tue, 12 May 2026 23:45:37 +0000 by mordeith