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web standards

tcp

wiki  rfc 793

http

wiki rfc 2616

web server

nginx

official site nginx wiki htaccess to nginx converter

mysql

mysql 5.5 reference manual percona configuration wizard

optimization

tcp mysqltuner.pl mysql tuning-primer.sh

security linux security alerts

debian docs wiki security apt-get cheat sheet
ubuntu docs wiki security

fedora docs wiki selinux

centos docs wiki

red hat linux docs

linux routing lartc

bash abs pitfalls

python

django official site
flask official site
gunicorn official site
web.py official site

cheklists

owasp php security cheatsheet

tools

blogs

cyberciti.biz

network programming
beej’s guide

scaling

The C10K problem