[khafa]

hi,


you dont have yum installed.


so you can go for rpm(as mentioned above)

rpm -qa

(to view all the packages)

or

rpm -qa | grep java

(to view java. replace java with whatever application name you may want to check)

[daark.child]

Remember that most packaging tools won't know anything about packages installed from source (except of course on source based distros). If you are installing packages packages from source, you may need to keep a log.

[Agent-X]

ls /usr/share/

ls /usr/bin/

ls /usr/lib

That's if you know stuff ahead of time.
In other words, it's a quick list of stuff.
And you can quickly identify things by knowing their acronyms and aliases.

/usr/ = unix system resources