lsof
strace
ltrace
Tools for C Code
perftools
gdb
Tools for Networks
tcpdump
ngrep
Tools for CPU Usage
perftools
perftools.rb
Tools for Memory Usage
bleak_house
gdb.rb
memprof
LSOF
List open files
lsof -nPp
-n : Inhibits the conversion of network numbers to host names.
-P : Inhibits the conversion of port numbers to names for network files
TCP Dump
Dump traffic on a network
tcpdump -i eth0 -s 0 -nqA
tcp dst port 3306