linux

http://www.thegeekstuff.com/2011/10/grep-or-and-not-operators/

#df -h
#df -i


contar ficheiros em pastas:
for i in `ls -1A`; do echo “`find $i | sort -u | wc -l` $i”; done | sort -rn | head -5


ou

sudo find . -xdev -type f | cut -d "/" -f 2 | sort | uniq -c | sort -n


http://www.pixelbeat.org/lkdb/screen.html

http://linuxadminzone.com/top-5-most-useful-commands-tools-for-linux-ad…

http://conntrack-tools.netfilter.org/manual.html

http://www.kernel.org/doc/man-pages/online/pages/man7/icmp.7.html

https://supportforums.cisco.com/thread/194681

http://www.frozentux.net/iptables-tutorial/iptables-tutorial.html#TRAVE…
http://www.opennet.ru/docs/RUS/iptables/misc/iptables-tutorial/scripts/…

http://wiki.openwrt.org/doc/howto/packet.scheduler/packet.scheduler

http://www.linuxhorizon.ro/iproute2.html
http://www.policyrouting.org/PolicyRoutingBook/ONLINE/CH03.web.html
http://linux-ip.net/html/routing-tables.html

http://blog.matws.net/post/2010/10/16/Correct-magic-mouse-scrolling-on-…