UMIACS - User contributions [en]

Unix groups

2025-02-05T18:29:43Z

Fchan1:

UNIX groups are useful for sharing file and directory permissions with other users in the UMIACS system. Each UMIACS account is by default a member of its own group, defined by that username. An account can be made member to any number of additional groups.

===Creating Groups & Adding Users===
A user may create up to 5 UNIX groups via the [https://intranet.umiacs.umd.edu/directory/groups/ Directory tool].
#Click ''Create UNIX Group'' on the Groups [https://intranet.umiacs.umd.edu/directory/groups/ page]
#Enter in the group name and a brief description of what the organization of users in the group is for, then click create group.
#Click on the link of the newly created group, add a valid UMIACS user into the available text box, click add user. '''NOTE: '''The user creating the group is not added to that group by default, and must be explicitly added after creation.

===Applying the Group===
*In order to apply the group to a file or directory to which you want to grant all members some set of permissions use the command
:<code>chgrp ''group-name'' ''file-name''</code>
This will grant the specified group ownership of the file, at the level of access that the previous group possessed.

===Verifying and Changing Group Permissions===
*To see the permissions that the group has for a specific file/directory use <code> ls -l </code> and the group permissions will be the 5,6,7th characters of the permissions listing.
*To change the permissions of the group on that file/directory, if you own the group, use
:<code>chmod g+''r/w/x'' ''file-name'' </code>
*To access a directory, both the <code>r</code> and <code>x</code> permission bits must be set on the directory.

===Deleting Groups===
Deleting groups will be managed by UMIACS staff. If you would like to delete a group, please submit a ticket through [[Jira|JIRA]].

File:GP linux debian fake.png

2025-02-04T15:55:46Z

Fchan1:

File:GP linux success.png

2025-01-21T21:26:35Z

Fchan1:

File:GP linux portal.png

2025-01-21T21:26:04Z

Fchan1:

File:GP linux fedora.png

2025-01-21T21:08:52Z

Fchan1: Fchan1 uploaded a new version of File:GP linux fedora.png

File:GP linux fedora.png

2025-01-21T21:05:43Z

Fchan1:

File:GP linux connected.png

2025-01-21T21:04:57Z

Fchan1:

File:GP linux application menu.png

2025-01-21T21:03:05Z

Fchan1:

Nexus/GPUs

2024-07-26T14:53:28Z

Fchan1: add h100 sxm info

There are several different types of [https://www.nvidia.com/en-us/ NVIDIA] GPUs in the [[Nexus]] cluster that are available to be scheduled. They are listed below in order of newest to oldest architecture, and then alphabetically.

We do not list the exact quantities of GPU here since they change frequently due to additions to or removals from the cluster or during compute node troubleshooting. To see which compute nodes have which GPUs and in what quantities, use the <code>show_nodes</code> command on a submission or compute node. The quantities are listed under the <tt>GRES</tt> column.

{| class="wikitable sortable"
! Name
! GRES string (Slurm)
! [https://www.nvidia.com/en-us/technologies Architecture]
! [https://developer.nvidia.com/cuda-toolkit CUDA] Cores
! GPU Memory
! Memory Bandwidth
! FP32 Performance (TFLOPS)
! [https://developer.nvidia.com/blog/accelerating-ai-training-with-tf32-tensor-cores/ TF32] Performance ([https://developer.nvidia.com/blog/accelerating-inference-with-sparsity-using-ampere-and-tensorrt Dense / Sparse TOPS])
|-
| H100 NVLink
| <code>h100-nvl</code>
| Hopper
| 33792
| 188GB HBM3
| 7.87TB/s
| 134
| not officially published/1979
|-
| H100 SXM
| <code>h100-sxm</code>
| Hopper
| 16896
| 80GB HBM3
| 3.35TB/s
| 67
| not officially published
|-
| RTX 6000 Ada Generation
| <code>rtx6000ada</code>
| Ada Lovelace
| 18176
| 48GB GDDR6
| 960GB/s
| 91.1
| 182.1/364.2
|-
| A100 PCIe 80GB
| <code>a100</code>
| Ampere
| 6912
| 80GB HBM2e
| 1.94TB/s
| 19.5
| 156/312
|-
| A100 SXM 80GB
| <code>a100</code>
| Ampere
| 6912
| 80GB HBM2e
| 2.04TB/s
| 19.5
| 156/312
|-
| GeForce RTX 3070
| <code>rtx3070</code>
| Ampere
| 5888
| 8GB GDDR6
| 448GB/s
| 20.3
| 20.3/40.6
|-
| GeForce RTX 3090
| <code>rtx3090</code>
| Ampere
| 10496
| 24GB GDDR6X
| 936GB/s
| 35.6
| 35.6/71
|-
| RTX A4000
| <code>rtxa4000</code>
| Ampere
| 6144
| 16GB GDDR6
| 448GB/s
| 19.2
| not officially published
|-
| RTX A5000
| <code>rtxa5000</code>
| Ampere
| 8192
| 24GB GDDR6
| 768GB/s
| 27.8
| not officially published
|-
| RTX A6000
| <code>rtxa6000</code>
| Ampere
| 10752
| 48GB GDDR6
| 768GB/s
| 38.7
| 77.4/154.8
|-
| GeForce RTX 2080 Ti
| <code>rtx2080ti</code>
| Turing
| 4352
| 11GB GDDR5X
| 616GB/s
| 13.4
| n/a
|-
| GeForce GTX 1080 Ti
| <code>gtx1080ti</code>
| Pascal
| 3584
| 11GB GDDR5X
| 484GB/s
| 11.3
| n/a
|-
| Quadro P6000
| <code>p6000</code>
| Pascal
| 3840
| 24GB GDDR5X
| 432GB/s
| 12.6
| n/a
|-
| Tesla P100
| <code>p100</code>
| Pascal
| 3584
| 16GB CoWoS HBM2
| 732GB/s
| 9.3
| n/a
|-
| TITAN X (Pascal)
| <code>titanxpascal</code>
| Pascal
| 3584
| 12GB GDDR5X
| 480GB/s
| 11.0
| n/a
|-
| TITAN Xp
| <code>titanxp</code>
| Pascal
| 3840
| 12GB GDDR5X
| 548GB/s
| 12.1
| n/a
|-
| GeForce GTX TITAN X
| <code>gtxtitanx</code>
| Maxwell
| 3072
| 12GB GDDR5
| 336GB/s
| 6.7
| n/a
|-
|}

Network/VPN/Linux

2024-06-28T04:15:11Z

Fchan1: DEB/RPM -> debian/red hat

'''Please note that this tutorial assumes you already have a network connection established.'''
'''If you have a UMIACS account, you already have access.'''

The UMIACS VPN is accessible through the Pulse Secure Client.

== Connecting through the Pulse Secure client ==
#'''Download the client:'''
#:[[Media:Pulsesecure_22.7.R2_amd64.deb|64 bit Pulse Secure Client <tt>.deb</tt> for Debian-based Linux (e.g. Ubuntu)]]
#:[[Media:Pulsesecure-22.7-R2.x86 64.rpm|64 bit Pulse Secure Client <tt>.rpm</tt> for Red Hat-based Linux (e.g. Fedora)]]
#:''Upon starting the client for the first time it may ask to upgrade the client. This will pull an up-to-date version of the client with the most recent configuration.''
#'''Navigate to the download location in terminal. e.g.: ''' <tt>cd ~/Downloads</tt>
#'''Install the package with dependencies, providing your password for sudo when requested.'''
#:*For a Debian-based OS, run: <code>sudo dpkg -i <insert_filename_here>.deb</code>
#:[[Image:UbuntuPulseInstall.png|thumb|center|500px|]]
#:*For a Red Hat-based OS, run: <code>sudo rpm -i <insert_filename_here>.rpm</code>
#:[[Image:FedoraPulseInstall.png|thumb|center|500px|]]
# You will need to manually install the packages shown below before proceeding with the Install:
#:*For a Debian-based OS, run: <code>sudo apt-get install libnss3-tools net-tools</code>
#:*For a Red Hat-based OS, run: <code>sudo dnf install libbsd webkit2gtk3</code>
#'''Start the client.'''
#:[[Image:UbuntuPulseDesktop.png|thumb|center|500px|]]
#'''and click 'Add' (+) under the connection section.'''
#:[[Image:UbuntuPulseInterface3.png|thumb|center|500px|Click the 'Add' (+) button to create a new connection.]]
#'''Enter a name for your VPN connection and the server URL 'vpn.umiacs.umd.edu''''
#:[[Image:UbuntuPulseInterface1.png|thumb|center|500px|Enter the name of the VPN server.]]
#'''Enter your UMIACS credentials and hit connect.'''
#:[[Image:UbuntuPulseInterface2.png|thumb|center|500px|Enter UMIACS credentials.]]
#'''When prompted for a secondary password, enter one of three options below (push, phone, or <press YubiKey>). For example, if you wish to push a notification to your device, type the word "push" into the secondary password box. '''
::{|class="wikitable"
!Second Credential Password Value:
! Result
|-
| push
| Send a push verification to your Duo connected device
|-
| phone
| Send a call verification to your Duo connected device.
|-
| <press YubiKey>
| If you have a physical token then you would press the YubiKey for the one time password.
|}
::Please note that registering a YubiKey for use with the VPN requires interaction with UMIACS Tech Staff. Please [[HelpDesk | contact us]] if you would like to register a YubiKey for this purpose.
{{Note|Pro-tip: Select ‘Save Settings’ on the secondary authentication prompt to have Duo automatically use your preferred method.}}

You should now be connected to the UMIACS VPN. You can close the window and the VPN will remain connected.

==Checking VPN Status==
# Launch the Pulse Client GUI
#:[[Image:UbuntuPulseDesktop.png|thumb|center|280px|]]
# Select the down arrow to show connection status.
#:[[Image:UbuntuPulseInterface4.png|thumb|center|280px|]]

Network/VPN

2024-05-30T16:53:24Z

Fchan1: Updated "Ubuntu" to "Linux" after adding instructions for RPM-based distros

{{Note | As of August 14th 2022, Pulse Secure Client has been rebranded as Ivanti Secure Access Client. Please follow this link for more information on this - [[Network/VPN/Ivanti|Ivanti Secure Access Client]]. }}

A virtual private network (VPN) extends a private network across a public network, and enables users to send and receive data across shared or public networks as if their computing devices were directly connected to the private network. UMIACS currently provides VPN access through a [https://www.ivanti.com/products/connect-secure-vpn Ivanti Connect Secure] SSL VPN to all users except [[ClassAccounts | class accounts]].

Please note that enrollment in our [[MFA]] is mandatory to connect using the UMIACS VPN. Enrollment steps can be found [[Duo | here]].

==Getting Connected==
Once connected to the VPN you can use the [[Remote_Desktop| Remote Desktop client]] to access a Windows machine, as well as access a number of other non-public UMIACS resources.

===Client Setup===
* '''Operating Systems:'''
:* [[Network/VPN/Windows|Configuring a Windows VPN Connection]]
:* [[Network/VPN/macOS|Configuring a macOS VPN Connection]]
:* [[Network/VPN/Linux|Configuring a Linux VPN Connection]]
* '''Mobile Devices:'''
:* [[Network/VPN/Mobile | Configuring a Mobile (iOS/Android) device]]

===VPN Troubleshooting===
* [[Network/VPN/Troubleshooting|Troubleshoot common VPN issues]]

===Multi-Factor Authentication===
* [[Network/VPN/MFA | Configuring Multi-Factor authentication]]

Network/VPN/Linux

2024-05-30T16:50:51Z

Fchan1: Fchan1 moved page Network/VPN/Ubuntu to Network/VPN/Linux: Genericizes Ubuntu VPN install instructions to add RPM-based linux (DOCS-1091)

'''Please note that this tutorial assumes you already have a network connection established.'''
'''If you have a UMIACS account, you already have access.'''

The UMIACS VPN is accessible through the Pulse Secure Client.

== Connecting through the Pulse Secure client ==
#'''Download the client:'''
#:[[Media:Pulsesecure_22.7.R2_amd64.deb|64 bit Pulse Secure Client for DEB-based Linux (e.g. Ubuntu)]]
#:[[Media:Pulsesecure-22.7-R2.x86 64.rpm|64 bit Pulse Secure Client for RPM-based Linux (e.g. Fedora)]]
#:''Upon starting the client for the first time it may ask to upgrade the client. This will pull an up-to-date version of the client with the most recent configuration.''
#'''Navigate to the download location in terminal. e.g.: ''' <tt>cd ~/Downloads</tt>
#'''Install the package with dependencies, providing your password for sudo when requested.'''
#:*For a DEB-based OS, run: <code>sudo dpkg -i <insert_filename_here>.deb</code>
#:[[Image:UbuntuPulseInstall.png|thumb|center|500px|]]
#:*For an RPM-based OS, run: <code>sudo rpm -i <insert_filename_here>.rpm</code>
#:[[Image:FedoraPulseInstall.png|thumb|center|500px|]]
# You will need to manually install the packages shown below before proceeding with the Install:
#:*For a DEB-based OS, run: <code>sudo apt-get install libnss3-tools net-tools</code>
#:*For an RPM-based OS, run: <code>sudo dnf install libbsd webkit2gtk3</code>
#'''Start the client.'''
#:[[Image:UbuntuPulseDesktop.png|thumb|center|500px|]]
#'''and click 'Add' (+) under the connection section.'''
#:[[Image:UbuntuPulseInterface3.png|thumb|center|500px|Click the 'Add' (+) button to create a new connection.]]
#'''Enter a name for your VPN connection and the server URL 'vpn.umiacs.umd.edu''''
#:[[Image:UbuntuPulseInterface1.png|thumb|center|500px|Enter the name of the VPN server.]]
#'''Enter your UMIACS credentials and hit connect.'''
#:[[Image:UbuntuPulseInterface2.png|thumb|center|500px|Enter UMIACS credentials.]]
#'''When prompted for a secondary password, enter one of three options below (push, phone, or <press YubiKey>). For example, if you wish to push a notification to your device, type the word "push" into the secondary password box. '''
::{|class="wikitable"
!Second Credential Password Value:
! Result
|-
| push
| Send a push verification to your Duo connected device
|-
| phone
| Send a call verification to your Duo connected device.
|-
| <press YubiKey>
| If you have a physical token then you would press the YubiKey for the one time password.
|}
::Please note that registering a YubiKey for use with the VPN requires interaction with UMIACS Tech Staff. Please [[HelpDesk | contact us]] if you would like to register a YubiKey for this purpose.
{{Note|Pro-tip: Select ‘Save Settings’ on the secondary authentication prompt to have Duo automatically use your preferred method.}}

You should now be connected to the UMIACS VPN. You can close the window and the VPN will remain connected.

==Checking VPN Status==
# Launch the Pulse Client GUI
#:[[Image:UbuntuPulseDesktop.png|thumb|center|280px|]]
# Select the down arrow to show connection status.
#:[[Image:UbuntuPulseInterface4.png|thumb|center|280px|]]

Network/VPN/Linux

2024-05-30T16:50:01Z

Fchan1: Added VPN install instructions for RPM-based linux distros

'''Please note that this tutorial assumes you already have a network connection established.'''
'''If you have a UMIACS account, you already have access.'''

The UMIACS VPN is accessible through the Pulse Secure Client.

== Connecting through the Pulse Secure client ==
#'''Download the client:'''
#:[[Media:Pulsesecure_22.7.R2_amd64.deb|64 bit Pulse Secure Client for DEB-based Linux (e.g. Ubuntu)]]
#:[[Media:Pulsesecure-22.7-R2.x86 64.rpm|64 bit Pulse Secure Client for RPM-based Linux (e.g. Fedora)]]
#:''Upon starting the client for the first time it may ask to upgrade the client. This will pull an up-to-date version of the client with the most recent configuration.''
#'''Navigate to the download location in terminal. e.g.: ''' <tt>cd ~/Downloads</tt>
#'''Install the package with dependencies, providing your password for sudo when requested.'''
#:*For a DEB-based OS, run: <code>sudo dpkg -i <insert_filename_here>.deb</code>
#:[[Image:UbuntuPulseInstall.png|thumb|center|500px|]]
#:*For an RPM-based OS, run: <code>sudo rpm -i <insert_filename_here>.rpm</code>
#:[[Image:FedoraPulseInstall.png|thumb|center|500px|]]
# You will need to manually install the packages shown below before proceeding with the Install:
#:*For a DEB-based OS, run: <code>sudo apt-get install libnss3-tools net-tools</code>
#:*For an RPM-based OS, run: <code>sudo dnf install libbsd webkit2gtk3</code>
#'''Start the client.'''
#:[[Image:UbuntuPulseDesktop.png|thumb|center|500px|]]
#'''and click 'Add' (+) under the connection section.'''
#:[[Image:UbuntuPulseInterface3.png|thumb|center|500px|Click the 'Add' (+) button to create a new connection.]]
#'''Enter a name for your VPN connection and the server URL 'vpn.umiacs.umd.edu''''
#:[[Image:UbuntuPulseInterface1.png|thumb|center|500px|Enter the name of the VPN server.]]
#'''Enter your UMIACS credentials and hit connect.'''
#:[[Image:UbuntuPulseInterface2.png|thumb|center|500px|Enter UMIACS credentials.]]
#'''When prompted for a secondary password, enter one of three options below (push, phone, or <press YubiKey>). For example, if you wish to push a notification to your device, type the word "push" into the secondary password box. '''
::{|class="wikitable"
!Second Credential Password Value:
! Result
|-
| push
| Send a push verification to your Duo connected device
|-
| phone
| Send a call verification to your Duo connected device.
|-
| <press YubiKey>
| If you have a physical token then you would press the YubiKey for the one time password.
|}
::Please note that registering a YubiKey for use with the VPN requires interaction with UMIACS Tech Staff. Please [[HelpDesk | contact us]] if you would like to register a YubiKey for this purpose.
{{Note|Pro-tip: Select ‘Save Settings’ on the secondary authentication prompt to have Duo automatically use your preferred method.}}

You should now be connected to the UMIACS VPN. You can close the window and the VPN will remain connected.

==Checking VPN Status==
# Launch the Pulse Client GUI
#:[[Image:UbuntuPulseDesktop.png|thumb|center|280px|]]
# Select the down arrow to show connection status.
#:[[Image:UbuntuPulseInterface4.png|thumb|center|280px|]]