Frequently Asked Questions - Revision history

Moses: /* How do I ssh into a specific login node, if I have a tmux session running there? */

2025-12-15T15:37:54Z

How do I ssh into a specific login node, if I have a tmux session running there?

← Older revision		Revision as of 11:37, 15 December 2025
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	It returns:		It returns:
	ss-sub1		ss-sub1
	If you ~~know~~ the login node your tmux session is running on, connect to that specific node directly:		Once you have known the login node (e.g., ss-sub1) where your tmux session is running on, you can connect to that specific node directly:
	ssh MyID@ss-sub1.gacrc.uga.edu		ssh MyID@ss-sub1.gacrc.uga.edu
	thus ls		thus ls

Moses at 15:34, 15 December 2025

2025-12-15T15:34:05Z

← Older revision		Revision as of 11:34, 15 December 2025
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	The login nodes allow tmux sessions to persist across ssh sessions. However, when you ssh into sapelo2.gacrc.uga.edu, your session can connect to one of several login nodes (for example, ss-sub1, ss-sub2, ss-sub3, etc). If you start a tmux session on one of the login nodes, it will not be available on the others. So you would need to check which login node you landed on and then log back into it directly. To check the name of the login node, you can run the command <code>hostname</code>. For example:		The login nodes allow tmux sessions to persist across ssh sessions. However, when you ssh into sapelo2.gacrc.uga.edu, your session can connect to one of several login nodes (for example, ss-sub1, ss-sub2, ss-sub3, etc). If you start a tmux session on one of the login nodes, it will not be available on the others. So you would need to check which login node you landed on and then log back into it directly. To check the name of the login node, you can run the command <code>hostname</code>. For example:
			hostname
	hostname

	It returns:		It returns:
			ss-sub1
	ss-sub1

	If you know the login node your tmux session is running on, connect to that specific node directly:		If you know the login node your tmux session is running on, connect to that specific node directly:
			ssh MyID@ss-sub1.gacrc.uga.edu
	ssh MyID@ss-sub1.gacrc.uga.edu		thus ls
	thus ls		tmux attach -t 0
	tmux attach -t 0

	----		----
	[[#top\|Back to Top]]		[[#top\|Back to Top]]

Moses at 15:31, 15 December 2025

2025-12-15T15:31:02Z

← Older revision		Revision as of 11:31, 15 December 2025
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	If you know the login node your tmux session is running on, connect to that specific node directly:		If you know the login node your tmux session is running on, connect to that specific node directly:

	ssh ~~uga_id~~@ss-sub1.gacrc.uga.edu		ssh MyID@ss-sub1.gacrc.uga.edu
	thus ls		thus ls
	tmux attach -t 0		tmux attach -t 0

Moses: /* How do I ssh into a specific login node, if I have a tmux session running there? */

2025-12-15T15:27:53Z

How do I ssh into a specific login node, if I have a tmux session running there?

← Older revision		Revision as of 11:27, 15 December 2025
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	===How do I ssh into a specific login node, if I have a tmux session running there?===		===How do I ssh into a specific login node, if I have a tmux session running there?===

	The login nodes allow tmux sessions to persist across ssh sessions. However, when you ssh into sapelo2.gacrc.uga.edu, your session can connect to one of several login nodes (for example, ss-sub1, ss-sub2, ss-sub3, etc). If you start a tmux session on one of the login nodes, it will not be available on the others. So you would need to check which login node you landed on and then log back into it directly. To check the name of the login node, you can run the command <code>hostname</code>.		The login nodes allow tmux sessions to persist across ssh sessions. However, when you ssh into sapelo2.gacrc.uga.edu, your session can connect to one of several login nodes (for example, ss-sub1, ss-sub2, ss-sub3, etc). If you start a tmux session on one of the login nodes, it will not be available on the others. So you would need to check which login node you landed on and then log back into it directly. To check the name of the login node, you can run the command <code>hostname</code>. For example:

			hostname

			It returns:

			ss-sub1

			If you know the login node your tmux session is running on, connect to that specific node directly:

			ssh uga_id@ss-sub1.gacrc.uga.edu
			thus ls
			tmux attach -t 0

	----		----
	[[#top\|Back to Top]]		[[#top\|Back to Top]]


	==Files==		==Files==

Moses: /* Will I still have access to GACRC Clusters after leaving UGA? */

2025-10-20T20:11:47Z

Will I still have access to GACRC Clusters after leaving UGA?

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	===Will I still have access to GACRC Clusters after leaving UGA?===		===Will I still have access to GACRC Clusters after leaving UGA?===

	As long as your MyID stays active in the UGA system and your professor/group PI wants to continue to keep you in his/her computing lab, your cluster access will be maintained by GACRC. As a student, about a year after you graduate or leave UGA, you will receive an email notifying you that your MyID account will be disabled. Faculty and staff's MyID might be disabled as soon as they leave UGA. You can find detailed info about this at https://~~eits~~.~~uga~~.~~edu~~/~~access_and_security~~/~~myid~~/~~myid_account_removal~~/. To have access to Sapelo2 beyond this point, your UGA research group PI can request a Visiting Researcher/Scholar (VRS) or a Remote Visiting Researcher/Scholar (Remote VRS or RVRS) status for you. Information about this program and its application process is available at https://research.uga.edu/visiting/		As long as your MyID stays active in the UGA system and your professor/group PI wants to continue to keep you in his/her computing lab, your cluster access will be maintained by GACRC. As a student, about a year after you graduate or leave UGA, you will receive an email notifying you that your MyID account will be disabled. Faculty and staff's MyID might be disabled as soon as they leave UGA. You can find detailed info about this at https://uga.teamdynamix.com/TDClient/3190/eitsclientportal/KB/ArticleDet?ID=168740. To have access to Sapelo2 beyond this point, your UGA research group PI can request a Visiting Researcher/Scholar (VRS) or a Remote Visiting Researcher/Scholar (Remote VRS or RVRS) status for you. Information about this program and its application process is available at https://research.uga.edu/visiting/

	Please note that Sapelo2 should only be used for work done in collaboration with your UGA PI.		Please note that Sapelo2 should only be used for work done in collaboration with your UGA PI.

Shtsai: /* How do I connect to GACRC clusters? */

2025-10-07T21:07:21Z

How do I connect to GACRC clusters?

← Older revision		Revision as of 17:07, 7 October 2025
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	Users can access GACRC clusters using secure shell (ssh) from their local machines either on-campus or off-campus. To connect via ssh, you must have an ssh software on your local machine and a connection to the UGA campus network. ssh software is included in recent releases of Unix based operating systems (including Linux and Mac OSX). If you are using a Windows computer, you can download and install PuTTY. You can find detailed instructions on how to download and install PuTTY on your Windows computer at https://wiki.gacrc.uga.edu/wiki/How_to_Install_and_Configure_PuTTY.		Users can access GACRC clusters using secure shell (ssh) from their local machines either on-campus or off-campus. To connect via ssh, you must have an ssh software on your local machine and a connection to the UGA campus network. ssh software is included in recent releases of Unix based operating systems (including Linux and Mac OSX). If you are using a Windows computer, you can download and install PuTTY. You can find detailed instructions on how to download and install PuTTY on your Windows computer at https://wiki.gacrc.uga.edu/wiki/How_to_Install_and_Configure_PuTTY.

	Please note that connecting to GACRC clusters from off-campus requires connecting to the [https://~~eits~~.~~uga~~.~~edu~~/~~access_and_security~~/~~infosec~~/~~tools~~/~~vpn~~/ UGA VPN]. For more detailed information on how to connect to a specific GACRC cluster, please see the [[Connecting]] page.		Please note that connecting to GACRC clusters from off-campus requires connecting to the [https://uga.teamdynamix.com/TDClient/3190/eitsclientportal/KB/ArticleDet?ID=154569 UGA VPN]. For more detailed information on how to connect to a specific GACRC cluster, please see the [[Connecting]] page.

	===I received an SSH host key error when trying to connect to a GACRC cluster. What does this mean?===		===I received an SSH host key error when trying to connect to a GACRC cluster. What does this mean?===

Shtsai: /* Will I still have access to GACRC Clusters after leaving UGA? */

2025-08-21T20:06:58Z

Will I still have access to GACRC Clusters after leaving UGA?

← Older revision		Revision as of 16:06, 21 August 2025
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	As long as your MyID stays active in the UGA system and your professor/group PI wants to continue to keep you in his/her computing lab, your cluster access will be maintained by GACRC. As a student, about a year after you graduate or leave UGA, you will receive an email notifying you that your MyID account will be disabled. Faculty and staff's MyID might be disabled as soon as they leave UGA. You can find detailed info about this at https://eits.uga.edu/access_and_security/myid/myid_account_removal/. To have access to Sapelo2 beyond this point, your UGA research group PI can request a Visiting Researcher/Scholar (VRS) or a Remote Visiting Researcher/Scholar (Remote VRS or RVRS) status for you. Information about this program and its application process is available at https://research.uga.edu/visiting/		As long as your MyID stays active in the UGA system and your professor/group PI wants to continue to keep you in his/her computing lab, your cluster access will be maintained by GACRC. As a student, about a year after you graduate or leave UGA, you will receive an email notifying you that your MyID account will be disabled. Faculty and staff's MyID might be disabled as soon as they leave UGA. You can find detailed info about this at https://eits.uga.edu/access_and_security/myid/myid_account_removal/. To have access to Sapelo2 beyond this point, your UGA research group PI can request a Visiting Researcher/Scholar (VRS) or a Remote Visiting Researcher/Scholar (Remote VRS or RVRS) status for you. Information about this program and its application process is available at https://research.uga.edu/visiting/

	Please note that Sapelo2 should only be used for work done with your UGA PI.		Please note that Sapelo2 should only be used for work done in collaboration with your UGA PI.
	<!--		<!--
	A UGA research group PI can request an 810/811 can number for a non-UGA collaborator by filling out an Affiliate form and submitting it to the UGA Card Office. The form is available at https://tate.uga.edu/wp-content/uploads/sites/4/2021/06/ugacard-affiliates-form.pdf. Once the 810/811 number is ready, the PI can contact EITS to request to keep your MyID enabled (renewed) by using the form available from https://uga.teamdynamix.com/TDClient/2060/Portal/Requests/ServiceDet?ID=13358 (information about MyIDs are available at https://eits.uga.edu/access_and_security/myid/).		A UGA research group PI can request an 810/811 can number for a non-UGA collaborator by filling out an Affiliate form and submitting it to the UGA Card Office. The form is available at https://tate.uga.edu/wp-content/uploads/sites/4/2021/06/ugacard-affiliates-form.pdf. Once the 810/811 number is ready, the PI can contact EITS to request to keep your MyID enabled (renewed) by using the form available from https://uga.teamdynamix.com/TDClient/2060/Portal/Requests/ServiceDet?ID=13358 (information about MyIDs are available at https://eits.uga.edu/access_and_security/myid/).

Shtsai at 20:05, 21 August 2025

2025-08-21T20:05:39Z

← Older revision		Revision as of 16:05, 21 August 2025
Line 354:		Line 354:

	As long as your MyID stays active in the UGA system and your professor/group PI wants to continue to keep you in his/her computing lab, your cluster access will be maintained by GACRC. As a student, about a year after you graduate or leave UGA, you will receive an email notifying you that your MyID account will be disabled. Faculty and staff's MyID might be disabled as soon as they leave UGA. You can find detailed info about this at https://eits.uga.edu/access_and_security/myid/myid_account_removal/. To have access to Sapelo2 beyond this point, your UGA research group PI can request a Visiting Researcher/Scholar (VRS) or a Remote Visiting Researcher/Scholar (Remote VRS or RVRS) status for you. Information about this program and its application process is available at https://research.uga.edu/visiting/		As long as your MyID stays active in the UGA system and your professor/group PI wants to continue to keep you in his/her computing lab, your cluster access will be maintained by GACRC. As a student, about a year after you graduate or leave UGA, you will receive an email notifying you that your MyID account will be disabled. Faculty and staff's MyID might be disabled as soon as they leave UGA. You can find detailed info about this at https://eits.uga.edu/access_and_security/myid/myid_account_removal/. To have access to Sapelo2 beyond this point, your UGA research group PI can request a Visiting Researcher/Scholar (VRS) or a Remote Visiting Researcher/Scholar (Remote VRS or RVRS) status for you. Information about this program and its application process is available at https://research.uga.edu/visiting/

			Please note that Sapelo2 should only be used for work done with your UGA PI.
	<!--		<!--
	A UGA research group PI can request an 810/811 can number for a non-UGA collaborator by filling out an Affiliate form and submitting it to the UGA Card Office. The form is available at https://tate.uga.edu/wp-content/uploads/sites/4/2021/06/ugacard-affiliates-form.pdf. Once the 810/811 number is ready, the PI can contact EITS to request to keep your MyID enabled (renewed) by using the form available from https://uga.teamdynamix.com/TDClient/2060/Portal/Requests/ServiceDet?ID=13358 (information about MyIDs are available at https://eits.uga.edu/access_and_security/myid/).		A UGA research group PI can request an 810/811 can number for a non-UGA collaborator by filling out an Affiliate form and submitting it to the UGA Card Office. The form is available at https://tate.uga.edu/wp-content/uploads/sites/4/2021/06/ugacard-affiliates-form.pdf. Once the 810/811 number is ready, the PI can contact EITS to request to keep your MyID enabled (renewed) by using the form available from https://uga.teamdynamix.com/TDClient/2060/Portal/Requests/ServiceDet?ID=13358 (information about MyIDs are available at https://eits.uga.edu/access_and_security/myid/).
	-->		-->

			===Can my external collaborators get access to Sapelo2?===

			Yes. A UGA PI can request a Visiting Researcher/Scholar (VRS) or a Remote Visiting Researcher/Scholar (Remote VRS or RVRS) status for an external collaborator. Information about this program and its application process is available at https://research.uga.edu/visiting/. Once the collaborator's VRS or RVRS status is active, the collaborator will have a UGA MyID. At that point, the UGA PI can request a Sapelo2 account for the collaborator, using our regular [https://uga.teamdynamix.com/TDClient/2060/Portal/Requests/ServiceDet?ID=25839 Account Creation Form].

	===Will I still have access to the Teaching Cluster once the semester is over?===		===Will I still have access to the Teaching Cluster once the semester is over?===

Shtsai at 19:54, 21 August 2025

2025-08-21T19:54:52Z

← Older revision		Revision as of 15:54, 21 August 2025
Line 353:		Line 353:
	===Will I still have access to GACRC Clusters after leaving UGA?===		===Will I still have access to GACRC Clusters after leaving UGA?===

	As long as your MyID stays active in the UGA system and your professor/group PI wants to continue to keep you in his/her computing lab, your cluster access will be maintained by GACRC. As a student, about a year after you graduate or leave UGA, you will receive an email notifying you that your MyID account will be disabled. Faculty and staff's MyID might be disabled as soon as they leave UGA. You can find detailed info about this at		As long as your MyID stays active in the UGA system and your professor/group PI wants to continue to keep you in his/her computing lab, your cluster access will be maintained by GACRC. As a student, about a year after you graduate or leave UGA, you will receive an email notifying you that your MyID account will be disabled. Faculty and staff's MyID might be disabled as soon as they leave UGA. You can find detailed info about this at https://eits.uga.edu/access_and_security/myid/myid_account_removal/. To have access to Sapelo2 beyond this point, your UGA research group PI can request a Visiting Researcher/Scholar (VRS) or a Remote Visiting Researcher/Scholar (Remote VRS or RVRS) status for you. Information about this program and its application process is available at https://research.uga.edu/visiting/
	https://eits.uga.edu/access_and_security/myid/myid_account_removal/. A UGA research group PI can request an 810/811 can number for a non-UGA collaborator by filling out an Affiliate form and submitting it to the UGA Card Office. The form is available at https://tate.uga.edu/wp-content/uploads/sites/4/2021/06/ugacard-affiliates-form.pdf. Once the 810/811 number is ready, the PI can contact EITS to request to keep your MyID enabled (renewed) by using the form available from https://uga.teamdynamix.com/TDClient/2060/Portal/Requests/ServiceDet?ID=13358 (information about MyIDs are available at https://eits.uga.edu/access_and_security/myid/).		<!--
			A UGA research group PI can request an 810/811 can number for a non-UGA collaborator by filling out an Affiliate form and submitting it to the UGA Card Office. The form is available at https://tate.uga.edu/wp-content/uploads/sites/4/2021/06/ugacard-affiliates-form.pdf. Once the 810/811 number is ready, the PI can contact EITS to request to keep your MyID enabled (renewed) by using the form available from https://uga.teamdynamix.com/TDClient/2060/Portal/Requests/ServiceDet?ID=13358 (information about MyIDs are available at https://eits.uga.edu/access_and_security/myid/).
			-->
	===Will I still have access to the Teaching Cluster once the semester is over?===		===Will I still have access to the Teaching Cluster once the semester is over?===

Chelsea: /* Python Modules */

2025-07-29T15:00:43Z

Python Modules

← Older revision		Revision as of 11:00, 29 July 2025
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	====Python Modules====		====Python Modules====

	Python modules that are not a part of the standard Python library will typically have their own software modules which also load a particular version of Python. For example, the software module TensorFlow/2.11.0-foss-2022a-CUDA-11.7.0 would load TensorFlow version 2.11.0 and Python 3.19.4. Another example is SciPy-bundle/2022.05-foss-2022a, which loads several scientific Python packages, such as numpy, scipy, and pandas, as well as Python 3.10.4.		Python modules that are not a part of the standard Python library will typically have their own software modules which also load a particular version of Python. For example, the software module TensorFlow/2.11.0-foss-2022a-CUDA-11.7.0 would load TensorFlow version 2.11.0 and Python 3.9.4. Another example is SciPy-bundle/2022.05-foss-2022a, which loads several scientific Python packages, such as numpy, scipy, and pandas, as well as Python 3.10.4.

	===What is Singularity?===		===What is Singularity?===