1. generate RSA key
ssh-keygen -t rsa -C "dizhonghu@gmail.com"
2. tcpdump
tcpdump -n host 173.39.168.250 or host 192.168.0.5
tcpdump tcp and port 1270
tcpdump tcp and port 1270 -s 0 -w tcp.dat
tcpdump -i eth0 -vnn host 10.224.166.211 -w test.cap
3. wireshark filter
ip.src==10.224.173.43 && udp.srcport==7901
ip.dst==10.224.173.43
ip.src==10.224.173.43 && udp.srcport==7901 && ip.dst==10.224.173.91 && udp.dstport==58504
(ip.src==10.224.173.43 && ip.dst==10.224.173.91)||(ip.src==10.224.173.91 && ip.dst==10.224.173.43)
(ip.src==10.224.173.43 && udp.srcport ==1202 && ip.dst==10.224.173.91 && udp.dstport==17237)||(ip.src==10.224.173.91 && udp.srcport==17237 && ip.dst==10.224.173.43&& udp.dstport ==1202)
(ip.src == 10.224.82.94) || (ip.src == 10.224.55.66) || (ip.dst == 10.224.82.94 )||( ip.dst == 10.224.55.66)
4. vi shortcut
5. iTerm shortcut
6. opensource lisence
7. UML
一些小技艺
原文：http://www.cnblogs.com/awiki/p/5521792.html
