Hi Friends , its me Raja.
Today i am here to give a small description about Remote Login in Unix/Linux systems.
Now a days if any one wants to do remote access to the system then they have the first choice as Unix/Linux.By using Remote access simply we can access our desktop from anywhere in the world.So here we have some different types of Remote login methods.
we can do the remote login in two ways , i mean in command line or GUI methods and we gonna use TCP/IP network protocols.
Tha available remote login methods are ssh , telnet ,sftp,ftp .
So let me make a simple start with these commands , look at the first command
ssh :- Logs in interactively to a shell to perform multiple functions such as running
commands. This method uses encryption to scramble the session so that the
username, password, and all communications with the remote system are
encrypted , so we can consider it’s as a safe method.
telnet :- while coming to this method here its also having similar functionality as ssh have but the problem is its not going to encrypt the username, password and all other information about the communication process and that information also stored in text format and others in the network can access that information . So this not much better method if you want secure remote login’s.
sftp :- Actually this is used to transfer the files between two systems and we can trust this because all information is encrypted.
ftp :- this also similar to sftp in functionality but it is with out encryption .
we have some old methods for remote access , they are the r commands, rsh =>remote
shell, rcp => remote copy , and rlogin => remote login were prevalent in the past, but because they
offer little security, they’re generally discouraged in today’s environments. rsh and rlogin are similar
in functionality to telnet, and rcp is similar to ftp.
I Hope this information can help you to get some idea about remote access methods.
Regards
Raja