Need help creating using encrypted Rar files

Heya
I have been trying to do this for quite some time, but successfully failed
How do I make a password protected rar file in Ubuntu?

And if you can, please let me know how to make a split password protected rar archive in Ubuntu? Like if I have a file of size 50MB and I want it to split it to 5 rar parts, each having 10 MB and password protected.

Also, I would like to know how to unrar those general rar files as well as encrypted rar files

there is a package called unrar. you can install that to unrar those rar files. just type this command- sudo apt-get install unrar

and the answer for the other part you asked is "sorry i don't know!!!".

may be this link can help.

man :p I know about rar and unrar. I also know how to rar files as well as unrar them.
But I am stuck at this encryption part!!!
I tried using the -p switch to encrypt,(as that's what was written in the manual of rar and unrar) but failed.
And saw that link before

hmm.......