Linux
- Debian
My favorite Linux distribution. I've tried others, but this one makes me happy.
- freshmeat.net
freshmeat maintains the Web’s largest index of Unix and cross-platform open source software. Thousands of applications are meticulously cataloged in the freshmeat database, and links to new code are added daily.
- grsecurity
grsecurity is an innovative approach to security utilizing a multi-layered detection, prevention, and containment model.
- Linoleum: Linux Programming Resources
Linoleum is a collection of references to programming resources for Linux, Unix and BSD systems.
- netfilter
Packet filtering framework inside the Linux 2.4.x and 2.6.x kernel series. Software commonly associated with netfilter.org is iptables.
- Openwall Project
Information Security software for open computing environments, related publications, and consulting services
- Packet storm security
Information and computer security full disclosure web site
- PuTTY: a free telnet/ssh client
PuTTY is a free implementation of Telnet and SSH for Win32 and Unix platforms, along with an xterm terminal emulator. It is written and maintained primarily by Simon Tatham.
- RFC.net repository of RFC STD BCP and FYI documents
Easy access to all current RFC and STD documents
- Samba
Home of Samba, the SMB file server
- Slashdot
News for nerds, stuff that matters.
- The GNU Operating system
Since 1983, developing the free UNIX style operating system GNU, so that computer users can have the freedom to share and improve the software they use.
- The Linux Documentation Project
The Linux Documentation Project is working towards developing free, high quality documentation for the Linux operatingsystem. The overall goal of the LDP is to collaborate in all of the issues of Linux documentation.
- The Linux Kernel Archives
This is the primary site for the Linux kernel source, but it has much more than just Linux kernels.
- TrinityOS
A Guide to Configuring Your Linux Server for Performance, Security, and Manageability.
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