linux 调试工具

• gdb
• strace
• dstat
• lsof

　　The lsof -i command lists all open files associated with Internet connections. It is similar in format to netstat -a -p .

lsof –i :587
lsof –i :smtp
lsof –i @labrat.remote.net

LSOF will then output all matching connections. The above examples will list connections listening or established on port 587, list connections associated with the well-known service SMTP, and list connections coming from or going to the host labrat.remote.net, respectively. 

lsof -p 409
LSOF will also accept a PID and output all open files it is using. 

lsof -nP -p pid   显示IP和端口，而不是域名

 

     lsof +d /a/directory     显示该目录下所有文件对应的使用进程

• fuser
• proc文件系统 　　/proc/net/unix
• ss
• netstat
• pstree
• tcpdump