Build a Wi-Fi captive portal hotspot on Debian using CoovaChilli, FreeRadius, MySQL, and daloRADIUS

Create a bootable USB drive with GRUB2 and LUA to auto-detect and boot multiple Linux live ISO images

Diagnose a failing RAID1 disk using S.M.A.R.T., badblocks, and mdadm, then replace it

Install Perl DBD::Oracle and Oracle Instant Client into a home directory on Debian without root access

Disable IPv6 in Debian by adding a GRUB kernel boot parameter

Configure GRUB2 for serial console output on Debian

Set up LUKS-encrypted disks using dm-crypt with GPG-encrypted keys fetched from a remote HTTP server

Install and configure Cobbler with yum on RHEL/CentOS 4.6 for PXE network provisioning

Use pdfcrop to trim large margins from PDF documents

Clean unused digiKam thumbnails while preserving thumbnails for photos stored on remote network shares