#unix

NextBSD — Revived BSD OS with macOS User-Space

Active open-source OS project merging Apple's open-source system layer (Mach IPC, launchd, libxpc, libdispatch, CoreFoundation) onto a modern FreeBSD kernel. Shows detailed technical component status (kernel, drivers, system services) and philosophy of 'open in the open.'

LinuxCommand.org

Learn the Linux command line. Classic, comprehensive tutorial on shell scripting and Unix command-line tools.

Epoch Converter

Convert Unix timestamps to human-readable dates and back.

commandlinefu

Repository of command-line snippets. User-submitted one-liners for common and obscure tasks.

Destroy All Software

Gary Bernhardt's screencasts on software. Advanced topics explained well.

nixCraft

Linux and Unix tutorials and tips. Practical sysadmin knowledge.

Tildeverse

A loose association of pubnix servers providing free Unix shell accounts and fostering a community of small-web enthusiasts.