http://www.motobit.com/util/charset-codepage-conversion.asp

http://linux-ip.net/sw/gratuitous-arp/README

http://www.debianhelp.co.uk/networktools2.htm

#aptitude install iotop
#iotop

outra opção:
#aptitude install sysstat
em /etc/default/sysstat colocar ENABLED="true"
#sar

http://www.go2linux.org/sysstat-linux-performance-monitor-toolkit

outra opção: lsof
http://www.linuxquestions.org/questions/slackware-14/how-to-see-what-ap…

http://servidordebian.wikidot.com/squeeze:monitoring-system-munin

dstat -D /dev/sdc
https://www.tecmint.com/dstat-monitor-linux-server-performance-process-…

https://www.tecmint.com/command-line-tools-to-monitor-linux-performance/

http://2bits.com/articles/tools-for-performance-tuning-and-optimization…

http://www.voip-info.org/wiki/view/ENUM

# apt-get install build-essential php5-dev bzip2
wget http://bart.eaccelerator.net/source/0.9.6.1/eaccelerator-0.9.6.1.tar.bz2
tar xvfj eaccelerator-0.9.6.1.tar.bz2
cd eaccelerator-0.9.6.1
phpize
./configure
make
#make install
# mkdir -p /var/cache/eaccelerator
chmod 0777 /var/cache/eaccelerator


provavelmente foi isto que aconteceu no servidor web da escola.
http://2bits.com/articles/tuning-the-apache-maxclients-parameter.html

http://bulma.net/body.phtml?nIdNoticia=1511