SSH Key Authentication: Difference between revisions

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** From the the drop-down list next to '''Key Length:''', select at least '''1024'''. You may choose a greater key length, but the time it takes to generate the key, as well as the time it takes to authenticate using it, will go up.
** From the the drop-down list next to '''Key Length:''', select at least '''1024'''. You may choose a greater key length, but the time it takes to generate the key, as well as the time it takes to authenticate using it, will go up.
* Click '''Next'''. The key generation process will start. When it's complete, click Next again.
* Click '''Next'''. The key generation process will start. When it's complete, click Next again.
* In the "File Name:" field, enter a name for the file where SSH Secure Shell will store your private key. Your public key will be stored in a file with the same name, plus a .pub extension.
* In the '''File Name:''' field, enter a name for the file where SSH Secure Shell will store your '''private key'''. Your '''public key''' will be stored in a file with the same name, plus a '''.pub extension'''.
** '''Important:''' You can put a passphrase for your SSH key ( Not mandatory but highly recommended)
** '''Important:''' You can put a passphrase for your SSH key ( Not mandatory but highly recommended)
* To complete the key generation process, click '''Next''', and then '''Finish'''.
* To complete the key generation process, click '''Next''', and then '''Finish'''.

Revision as of 22:59, 27 August 2016

These instructions assist existing users of Cheaha in getting access to Big Green / Cheaha2.

Mac OS X

  • On your Mac open Terminal application.
  • Run the following command on your terminal: 
ssh-keygen -t rsa
  • You can put a passphrase for your SSH key ( Not mandatory but highly recommended)
  • A id_rsa.pub file would have been created.
  • Open the file by running less ~/.ssh/id_rsa.pub and copy the content.
  • Press q to exit out of the file.
  • Now SSH to your cheaha.uabgrid.uab.edu account , and paste the content in ~/.ssh/authorized_keys using your favorite editor.
  • Now log out from cheaha.uabgrid.uab.edu
  • Run
ssh blazerid@cheaha.rc.uab.edu
  • You should have been able to login to Big Green.


Linux

  • On your linux machine open Terminal application.
  • Run the following command on your terminal: 
ssh-keygen -t rsa
  • You can put a passphrase for your SSH key ( Not mandatory but highly recommended)
  • A id_rsa.pub file would have been created.
  • Open the file by running less ~/.ssh/id_rsa.pub and copy the content.
  • Press q to exit out of the file.
  • Now SSH to your cheaha.uabgrid.uab.edu account , and paste the content in ~/.ssh/authorized_keys using your favorite editor.
  • Now log out from cheaha.uabgrid.uab.edu
  • Run
ssh blazerid@cheaha.rc.uab.edu
  • You should have been able to login to Big Green.


Windows

Putty

SSH Secure Shell Client

  • In SSH Secure Shell, from the Edit menu, select Settings...
  • In the window that opens, select Global Settings, then User Authentication, and then Keys.
  • Under "Key pair management", click Generate New.... In the window that appears, click Next.
  • In the Key Generation window that appears:
    • From the drop-down list next to Key Type:, select from the following:
      • If you want to take less time to initially generate the key, select DSA.
      • If you want to take less time during each connection for the server to verify your key, select RSA.
    • From the the drop-down list next to Key Length:, select at least 1024. You may choose a greater key length, but the time it takes to generate the key, as well as the time it takes to authenticate using it, will go up.
  • Click Next. The key generation process will start. When it's complete, click Next again.
  • In the File Name: field, enter a name for the file where SSH Secure Shell will store your private key. Your public key will be stored in a file with the same name, plus a .pub extension.
    • Important: You can put a passphrase for your SSH key ( Not mandatory but highly recommended)
  • To complete the key generation process, click Next, and then Finish.
  • At the Settings screen, click OK.
  • Copy the content of .pub file generated.
  • Now SSH to your cheaha.uabgrid.uab.edu account , and paste the content in ~/.ssh/authorized_keys using your favorite editor.
  • Now log out from cheaha.uabgrid.uab.edu
  • Run
ssh blazerid@cheaha.rc.uab.edu
  • You should have been able to login to Big Green.
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