We know ssh and scp. How are these different from rsh and rcp? Explain it detailedly.
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Thank you guys so much. I will really appreciate it.
Three answers:
Joe P
2007-12-06 10:04:24 UTC
In a nutshell, these two sets of utilities look very similar and provide similar functions, but with rsh and rcp, data is exchanged between two systems in an unsecure manner. Text is sent "clear text", meaning anyone with the capability of examining the network traffic will see it all plainly (even passwords!). Binaries are not encrypted, so pictures, programs, documents, etc. can all be intercepted and used by unintended recipients. With ssh and scp, all data sent is encrypted. Additionally, with these two utilities as well as others that use SSH as the transport layer, there are some ways to enhance authentication using private / public key pairs. In fact, password authentication can be turned off altogether. The only way to establish a connection then is to be in possession of a private (software) key, which will authenticate with a matching public key on the remote machine. Then nobody can connect as you by guessing your password, you just have to remember to keep your private key private! SSH type connections give you one more protection. Each remote machine to which you connect has a "host key", which is unique to that machine. Any time you connect to one, your ssh software will check to see if the host key has changed since the last time you connected. If it has, you'll get a warning that someone may have "spoofed" the name / address of the remote machine. If you have no reason to think that the host key should have changed (replacing a server or reloading the operating system, for example), then you would beware of completing the connection.
furlong
2016-11-14 00:14:06 UTC
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Paul
2014-07-17 22:29:04 UTC
If you need help using SSH to connect to a server, device, check this site out: