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< h1 > How to use Authorized Keys to Create a Passwordless SSH Connection< / h1 >
< p class = "posted" > 1st February 2012< / p >
< p > If you're accessing Linux servers or automating tasks between servers, rather than having to enter your user password every time, you can also use SSH public key authentication. This is a simple process that involves creating a local key and storing it within the < em > authorized_keys< / em > file on the remote server.< / p >
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< li > Check if you already have a SSH key.
< code > $ ssh-add -L< / code > < / li >
< li > If you don't have one, create one.
< code > $ ssh-keygen< / code > < / li >
< li > Upload the key onto the server. Replace < em > myserver< / em > with the hostname or IP address of your remote server.
< code > $ ssh-copy-id myserver< / code > < / li >
< / ol >
< p > If you're using Mac OS X and you don't have ssh-copy-id installed, download and install < a href = "http://mxcl.github.com/homebrew" title = "Homebrew" > Homebrew< / a > and run the < code > brew install ssh-copy-id< / code > command.< / p >
< p > If successful, you should now see a message like:< / p >
< blockquote >
< p > Now try logging into the machine, with "ssh 'myserver'", and check in:< / p >
< p > ~/.ssh/authorized_keys< / p >
< p > to make sure we haven't added extra keys that you weren't expecting.< / p >
< / blockquote >
< p > Now the next time that you SSH onto the server, it should log you in without prompting you for your password.< / p >
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Tags:
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< a href = "https://opdavies.github.io/oliverdavies.uk/blog/tags/linux" > linux< / a > , < a href = "https://opdavies.github.io/oliverdavies.uk/blog/tags/ssh" > ssh< / a > < / p >
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< p > Oliver Davies is a Web Developer, System Administrator and Drupal specialist based in the UK. He is a Senior Developer at < a href = "https://microserve.io" > Microserve< / a > and also provides freelance consultancy services for Drupal websites, PHP applications and Linux servers.< / p >
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