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The information below will be helpful in getting a new user started in our Linux environment.
For your account on our cluster, the following information is relevant. The Initial password will be sent in a separate message. You can change your password once you've logged in by using the "kpasswd" command. It will take up to one hour after it is changed before the new password will take effect. (This can only be done from one of the umt3int0x machines below).
We have 5, essentially equivalent, interactive machines that you can use ssh client to connect to in addition to any desktop at UM that is ours: umt3int01.aglt2.org to umt3int05.aglt2.org
Your home account is in afs space, has 1GB of storage, and is backed up. For work requiring more space, there is a directory area in NFS at /atlas/data19/your_usernamethat is owned by you. Your disk quota there is 50GB. If needed, you can also reqeust a storage area in /lustre/umt3/user/your_username Which has unlimited space shared with all UM Tier3 users. Please note: Neither the NFS nor the Lustre space has back up!!
Be aware! When working on an office workstation, files placed on your desktop are counted towards your afs quota, and it can be very easily filled this way. Please use the NFS directories for the bulk of such storage. If you wish to use (non-backed-up) local storage on your office desktop, please let me know and I will prepare a location for you.
Since your home directory is in afs, you will need to provide an extra layer of security for your ssh keys, should you choose to store them for ease of access within our systems. You can look at the URL below for information on how to do this. The .private directory referenced in this document is already created with the correct permissions, so all you'll need to do is place your keys there for safe keeping.
https://www.aglt2.org/wiki/bin/view/AGLT2/SetupSSHKeys
Note that your password tokens expire after 30 days if you log in to an interactive machine via ssh key, but if you log in via password, they are immediately refreshed. Tokens can be renewed at any time by
kinit
<enter your password>
aklog Then you can run tokens to check the validity of your AFS tokens.
A recent security change in our afs directories means that most of your afs directory can be LISTED by other users, but no file can be READ by other users to see the content. We have provided two directories for you to work within this limitation.
~/private cannot even be listed by any other user.
~/public can be used to share files with any other user as they have the required READ permission. A 3rd such directory, ~/.private (note the dot) is protected such that not even system administrators can see the content.
For information to submit or debug your Condor jobs, please refer to : https://www.aglt2.org/wiki/bin/view/AGLT2/Tier3CondorDiag -- WenjingWu - 10 Jul 2025
For your account on our cluster, the following information is relevant. The Initial password will be sent in a separate message. You can change your password once you've logged in by using the "kpasswd" command. It will take up to one hour after it is changed before the new password will take effect. (This can only be done from one of the umt3int0x machines below).
We have 5, essentially equivalent, interactive machines that you can use ssh client to connect to in addition to any desktop at UM that is ours: umt3int01.aglt2.org to umt3int05.aglt2.org
Your home account is in afs space, has 1GB of storage, and is backed up. For work requiring more space, there is a directory area in NFS at /atlas/data19/your_usernamethat is owned by you. Your disk quota there is 50GB. If needed, you can also reqeust a storage area in /lustre/umt3/user/your_username Which has unlimited space shared with all UM Tier3 users. Please note: Neither the NFS nor the Lustre space has back up!!
Be aware! When working on an office workstation, files placed on your desktop are counted towards your afs quota, and it can be very easily filled this way. Please use the NFS directories for the bulk of such storage. If you wish to use (non-backed-up) local storage on your office desktop, please let me know and I will prepare a location for you.
Since your home directory is in afs, you will need to provide an extra layer of security for your ssh keys, should you choose to store them for ease of access within our systems. You can look at the URL below for information on how to do this. The .private directory referenced in this document is already created with the correct permissions, so all you'll need to do is place your keys there for safe keeping.
https://www.aglt2.org/wiki/bin/view/AGLT2/SetupSSHKeys
Note that your password tokens expire after 30 days if you log in to an interactive machine via ssh key, but if you log in via password, they are immediately refreshed. Tokens can be renewed at any time by
kinit
<enter your password>
aklog Then you can run tokens to check the validity of your AFS tokens.
A recent security change in our afs directories means that most of your afs directory can be LISTED by other users, but no file can be READ by other users to see the content. We have provided two directories for you to work within this limitation.
~/private cannot even be listed by any other user.
~/public can be used to share files with any other user as they have the required READ permission. A 3rd such directory, ~/.private (note the dot) is protected such that not even system administrators can see the content.
For information to submit or debug your Condor jobs, please refer to : https://www.aglt2.org/wiki/bin/view/AGLT2/Tier3CondorDiag -- WenjingWu - 10 Jul 2025
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Topic revision: r2 - 10 Jul 2025, WenjingWu
AGLT2
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