1.4. How to use SSH relay server¶
1.4.1. Explanation¶
Following limited commands can be used after login to SSH relay server（cms-ssh.sc.imr.tohoku.ac.jp）.
Command |
Overview |
|---|---|
ssh |
Login to Front-end node. |
exit |
Logout from SSH relay server |
passwd |
Change the password for login to front-end node. |
keydel |
Delete your public key registered in SSH relay server. |
1.4.2. Initial display¶
Explanation of Limited commands are displayed when you login to SSH relay server.
To connect to a front end node, login as follows:
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ssh -l <user> <host> : Go remote host. (do not add any other option.)
exit : Logout.
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To change your password of Supercomputing system:
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passwd
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To delete your SSH public key:
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keydel
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1.4.3. ssh command¶
Use ssh command to login to front-end node.
This is how to login to Large-Scale Parallel Computing Server.
ssh super.sc.imr.tohoku.ac.jp
This is how to login to Accelerator Server.
ssh gpu.sc.imr.tohoku.ac.jp
Execute ssh command and input password.
username@super's password:
Attention
If you login to node first time, use initial password you recieved by E-mail. If you login to node 2nd times or later, use password you changed. You should change initial password when you login first time. Current password is initial password you recieved by E-mail and new password should be setted with following rules.
Minimum password length is 10.
Use one or more lower-case letters.
Use one or more upper-case letters.
Use one or more numerical digits.
1.4.4. exit command¶
Logout from SSH relay server.
exit
1.4.5. passwd command¶
To change password for login, use passwd command.
> passwd
Please change your password of Supercomputing system now, according to the following policies:
(1) Minimum password length is 10.
(2) Use one or more lower-case letters.
(3) Use one or more upper-case letters.
(4) Use one or more numerical digits.
Current password:
Attention
Current password is current password, New password should be setted with following rules.
Minimum password length is 10.
Use one or more lower-case letters.
Use one or more upper-case letters.
Use one or more numerical digits.
1.4.6. keydel command¶
Use keydel command to delete your public key.
keydel
If press “y”, public key is deleted immediatelly. After executing this command, you need to register again.
Are you sure you want to delete your public key? (y/n):