hello everyone,

actually I have a question if you don't mind & please ..

Is rsh comes already with the linux as ssh or we should install it???


thanks in advances.

SSH and RSH are two separate things.

SSH comes with most Linux distros. RSH is often an option, but doesn't get installed. While you can add it, it's better to use something more secure, such as SSH.

As to whether or not you should install it, that depends on what you're trying to do.

thanks alot for your answer.
could u plz tell me from where can i add RSH? i already searched however i prefer to ask first.

i tried SSH before, however i can't let it worked whithout a passphrase. if u know this point, i will be very thankful if u can help.

thanks alot.

I have a page Here which shows howto use SSH with a public-private key pair, ie with no password.

Basically, you need to generate a key using ssh-keygen and then tell the remote computer what the public key is. Then login with your private key.

RSH is not a good idea - I think it uses plain-text rather than encrypted.

--Ian

thanks again.

should i have a client server in order to use SSH or RSH??


thanks in advance.

How do you mean?

You will need to have an SSH server installed and running on the remote machine, and an SSH client installed on the local machine. Howto install these is dependent on your distro - if you use Debian then
on the remote machine and
on the local machine.

--Ian

I don't know if they do this on other distributions but on Ubuntu they linked rsh to ssh... a bit obnoxious if you ask me.

You can change this of course.

However, there is absolutely no reason why you need to run a telnet or rsh server - ssh is much better.

You may need ftp - but people really should look seriously at sftp.

Obviously, the clients are still needed, as the remote machine may only accept rsh, etc.

--Ian

With regards to all who promote the valid advantages of ssh over rsh, I offer a simple answer as to why you would continue to use rsh, especially as root - Because you have to.

Our environment includes about 1200 systems in our immediate group, 2300 at the site, over 5000 world-wide, with Linux, HPUX (back to 7.x), MPE, Solaris, AIX, OFS1, Ultrix, several lesser Unixs, not to mention Microsoft stuff going back to DOS 3.1, we don't always get to exercise denial. All this is still in operation because upgrading a single tool can cost $millionsUSD.

So to use rsh as root on Ubuntu, in addition to
aptitude install rsh-client rsh-server
and adjusting the /etc/xinedt.d/* and /etc/pam.d/* as others have documented. You need to insert pty entries in your /etc/securetty file.
pty/2
pty/3
pty/4
etc.

Hope this helps,
Dave

That's fine..but this is a two-year old thread. We realize there are times when you "have to", but it's so insecure as normal, it's hard to recommend in this day and age. You can (and should, as a good systems admin), exercise denial, because it's YOU that is ultimately responsible...not the users or management that 'make you' use something insecure.