ps -ef
List of all running processes
top
List the top resource consumers
env
List all environment variables
find -ls
Recursively list all files and directories
df -hk
Display the file system information
uname -Xa
List information about the server
psrinfo -v
List information about the servers processors
jstack
Get a stack trace of Java program to see what logic is running or stuck in.
Use kill -3
http://download.oracle.com/javase/6/docs/technotes/tools/share/jstack.html
jinfo
Get all Java runtime parameters such as command line options, classpath, etc.
http://download.oracle.com/javase/6/docs/technotes/tools/share/jinfo.html
jmap
Dump Java program memory into file for memory leak analysis.
http://download.oracle.com/javase/6/docs/technotes/tools/share/jmap.html
