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Setup password-less login to ssh on Linux

SSH (Secure Shell) is commonly used when administering remote servers. If you are working on some server regularly and find it tiring to type in the ssh password again and again, then it might be a good option to configure the login to not ask for the password. It is possible to make ssh shell login without password. However this does not mean that the login would not be authenticated. Instead a different authentication scheme would be used.