I'm using ssh to run the the programs located on the server on the client, But I always have to type the user password (server) so that I can log in... I don't need any security or RSA keys, so is it possible to just login to the sever with the same username as on the client and start doing things as it says in "man ssh". I'm not able to do that in my server's /etc/ssh/ssh_config. I just want to use protocol 1, where the client hostname is listed along with the username in /etc/ssh/shosts.equiv and there is no need for authentication. How can I achieve this? Can anyone help me?

If you don't need security, use rsh. It'll be easier and faster than SSH.

but can I use X apps with rsh like I do with ssh -X ?

First you have to run ssh-keygen (eg ssh-keygen -t dsa -b 4096). This creates a couple of key files under ~/.ssh/ called something like identity and identity.pub. You now want to copy the public key (identity.pub) to ~/.ssh/authorized_keys on the PC you want to connect to. If the file does not already exist just create it (scp ~/.ssh/identity.pub hostname:~/.ssh/autorized_keys), otherwise add your key to the file....the format is one key per line. You might want to repeat the process the other way too (ie so you can ssh from either pc without a password)