如何在linux命令行中查看进程的命令行和环境变量

Question

I'd like to be able to see both the command line that launch a given process (by PID) and the its environment variables.

Preferably from a command line but a script would be acceptable failing that.

This would be on Centos 5.3 but the more widely it works the better.

Answer 1

cat /proc/$pid/environ
cat /proc/$pid/cmdline

where $pid is the pid you are interested in

Answer 2

ps -ef is a quick way to get the command line args for everything. grep to your hearts delight!