Linux

Links
HowtoForge - Linux Howtos and Tutorials
livecdlist.com - overview of Linux LiveCDs
Debian Testing - daily builds of Debian Testing
ALSA - Advanced Linux Sound Architecture
Linux Apps - best of linux apps
http://wpkg.org/Diskless_/_remote_boot_with_Open-iSCSI
http://www.sysresccd.org/Main_Page - system repairing and data recovering
http://academy.linux-magazin.de/ - Linux-Magazin Academy
http://wiki.grml.org/doku.php?id=debian - Package management commands
http://www.go2linux.org/sudoers-how-to - sudoers
http://futurist.se/gldt/ - Linux Distribution Timeline

Distros
http://hacktolive.org/wiki/Super_OS
http://hacktolive.org/wiki/Repository

Damn Small Linux - very small Live CD
KANOTIX - Debian based LiveCD Distro
FreeNAS - The Free NAS Server
grml - Linux Live-CD for sysadmins
BackTrack - great distro for check net security, wep crack etc.
ENDIAN Firewall - Endian firewall community edition
Debian - Debian Installer Etch Beta 2 Download
http://www.linuxmce.org/
http://www.dd-wrt.com/ - Linux based firmware for wireless routers
http://www.opensolaris.org/ - OpenSolaris

Game
sudo apt-get install glest
http://www.playdeb.net/
http://play0ad.com/ - A. D. (Age of Empires clone)

Applications
dd_rescue - recover data from broken harddisks

Groupware
http://www.linux-magazin.de/online_artikel/uebersicht_groupware_server_teil_1

Kernel Options (from Documentation/kernel-parameters.txt)
vga=xxx - set your framebuffer resolution to VESA mode xxx. (http://en.wikipedia.org/wiki/VESA_BIOS_Extensions#Linux_video_mode_numbers)
acpi=off OR noacpi - This parameter disables the whole ACPI system. This may prove very useful, for example, if your computer does not support ACPI or if you think the ACPI implementation might cause some problems (for instance random reboots or system lockups).
acpi=force - Activates the ACPI system even if your computer BIOS date is older than 2000. This parameter overwrites acpi=off and can also be used with current hardware if the ACPI support is not activated despite apm=off.
pci=noacpi OR acpi=noirq - These parameters disable the PCI IRQ routing
pci=acpi - This parameter activates the PCI IRQ routing
acpi_irq_balance - ACPI is allowed to use PIC interrupts to minimize the common use of IRQs.
acpi_irq_nobalance - ACPI is not allowed to use PIC interrupts.
acpi=oldboot - Deactivates the ACPI system almost completely; only the components required for the boot process will be used.
acpi=ht - Impact Deactivates the ACPI system almost completely; only the components required for hyper threading will be used.
noapic - Disable the "Advanced Programmable Interrupt Controller (APIC)".
nolapic - Disable the "local APIC".
apm=off OR noapm - Disable the Advanced Power Management.
irqpoll - Changes the way the kernel handles interrupt calls (set it to polling). Can be useful in case of hardware interrupt issues.

openSuSE
http://www.suse.de/~ug/autoyast_doc/invoking_autoinst.html - Autoyast

Swap
https://en.wikipedia.org/wiki/Swappiness
# set minimal swap usage
echo "vm.swappiness = 1" > /etc/sysctl.d/90-swap.conf

Vim
http://vim.wikia.com/wiki/Search_and_replace - Search and replace

Configure static IP
# /etc/network/interfaces
auto eth0
iface eth0 inet static
address 192.168.1.150
netmask 255.255.255.0
# network 192.168.0.0
# broadcast 192.168.1.255
gateway 192.168.1.254
dns-nameserver 8.8.8.8
# dns-nameservers 8.8.4.4 8.8.8.8
dns-search local

Compression
https://catchchallenger.first-world.info/wiki/Quick_Benchmark:_Gzip_vs_Bzip2_vs_LZMA_vs_XZ_vs_LZ4_vs_LZO - Quick Benchmark: Gzip vs Bzip2 vs LZMA vs XZ vs LZ4 vs LZO