Linux

A step-by-step guide to installing the Cobbler 2.6.10 network boot and provisioning server on Ubuntu 14.04, with fixes for common setup issu…

Debugging Bugzilla email notification failures caused by a 504 gateway timeout when routing outbound mail through Gmail SMTP, with a working…

How to install Ruby 2.0.0-p247 using rbenv and ruby-build on CentOS 6.5, including patching for OpenSSL compatibility issues that break the …

Diagnosing SFTP and port connectivity failures using PortQry on Windows and nmap, nc, and ss on Linux to identify blocked or misconfigured p…

How to recover lost partitions and deleted files from a crashed hard disk using TestDisk, a free open-source data recovery tool that runs on…

ReactOS is an open-source OS designed to be binary-compatible with Windows NT applications and drivers, offering a free alternative without …

Shell scripting essentials for Linux sysadmins: VIM shortcuts, practical bash tips, and Unix command-line patterns that speed up day-to-day …

Setting up a local Drupal CMS development environment on Linux with Apache and MySQL, from installation to a working site ready for theme an…

How to install, configure, and secure a vsftpd FTP server on Ubuntu, covering user access controls and basic hardening for a self-hosted fil…

Understanding how a C program moves from source to executable: preprocessing, compilation, assembly, and linking explained with gcc flags an…

Useful Linux command-line tricks for sysadmins: splitting PDFs with pdftk, converting file formats, and automating repetitive file operation…

Preparing for the RHCE exam: focusing on command-line tools, hands-on lab practice, and the practical skills Red Hat tests in the performanc…

A first-time account of competing in ACM ICPC 2011: what the contest is, how to qualify for regionals, and what to expect as a first-time co…