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(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)- 11:46, 3 August 2022 Saurabh talk contribs created page Lvm2-pvscan service error on Suse LPAR or machine boot (Created page with "Home > Suse > Lvm2-pvscan service error on Suse LPAR or machine boot If we see following error while booting Suse LPAR or physical machine: <pre> FAILED] Failed to start LVM2 PV scan on device 254:7. See 'systemctl status lvm2-pvscan@254:7.service' for details </pre> Then the issue can be resolved by: # Login into emergency mode by entering root password # Start the lvm2 service manually: #:<pre> #:: systemctl start lvm2-pvscan@254:7.service...")
- 11:27, 3 August 2022 Saurabh talk contribs created page Making Input/Output Completion Port API Available (Created page with "Home > VOIS or AIX > Making Input/Output Completion Port API Available The IOCP API allows SAP ASE to process multiple simultaneous asynchronous I/O operations in a scalable fashion. If you do not have IOCP version 6.1.5.0 or later, SAP ASE does not start when you run '<tt>dataserver</tt>'. There might be error: <pre> 0509-136 Symbol CreateIoCompletionPort (number 579) is not exported from dependent module /unix </pre> To solve this use: # R...")
- 12:18, 22 July 2022 Saurabh talk contribs created page CentOS 8.x Reduce size of ext2, ext3 or ext4 partition (Created page with "Home > CentOS > CentOS 8.x > System Administration > Filesystem management > CentOS 8.x Reduce size of ext2, ext3 or ext4 partition In case size of ext partition (ext2-4) needs to be reduced, it can be done as follows: # Check the occupied and free space on partition: #:<pre> #:: df -h #:</pre> #: Ensure that we do not try to resize the partition to value less than free...")
- 10:59, 22 July 2022 Saurabh talk contribs created page CentOS 7.x LVM Remove physical volume from volume group (Created page with "=CentOS 7.x LVM Remove physical volume from volume group= To remove physical volume from volume group, there should be at least as many free Physical Extents (PE) in VG as present in that particular Pysical volume. Then we can move all used PE from Physical volume to other physical volumes in same VG and reduce "Used PE" count for physical volume to be removed to zero. Once used PE count is zero we can remove PV via vgreduce command. Overall steps are: # Check for fr...")
- 08:22, 22 July 2022 Saurabh talk contribs created page Configure NTP from cli or UI (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Configure NTP from cli or UI Changing time from CLI or UI is covered at ESXi host time settings =Configuring NTP from ESXi Web UI= # Login into ESXi web UI as root user # Go to Host -> Manage. Click on System -> Time and Date in right panel # Click on edit NTP settings ## Configure NTP to start and stop with host ## Configure comma separate ntp servers list ## Click Save # Under Host -> Ma...")
- 08:05, 22 July 2022 Saurabh talk contribs created page RHEL (Created page with "Home > RHEL *Upgrade RHEL6 to RHEL7")
- 08:05, 22 July 2022 Saurabh talk contribs created page Upgrade RHEL6 to RHEL7 (Created page with "Home > RHEL > Upgrade RHEL6 to RHEL7 We can upgrade from RHEL 6 to RHEL 7 as follows: # Install the tool to perform the migration from RHEL 6 to RHEL 7: #:<pre> #:: yum install redhat-upgrade-tool #:: yum install yum-utils #:</pre> # Disable all the enabled repositories: #:<pre> #:: yum-config-manager --disable \* #:</pre> # Download latest RHEL 7 ISO ## Visit the Red Hat Customer Service Portal at https://access.redhat.com/login and enter your use...")
- 08:00, 22 July 2022 Saurabh talk contribs created page Export of users from AD and import into another AD (Created page with "Home > Windows > Active Directory > Export of users from AD and import into another AD This was planned but the project was not required. Capturing references below to build KB in future: Refer: * Export : https://www.codetwo.com/admins-blog/export-users-from-active-directory/ * Import : ** https://networkproguide.com/bulk-import-users-into-active-directory-from-csv/ ** https://theitbros.com/import-users-into-active-directory-from-csv...")
- 07:38, 22 July 2022 Saurabh talk contribs created page Taking backup of VIOS server (Created page with "Home > VOIS or AIX > Taking backup of VIOS server To take backup of VIOS server use: # For backup, Create directory in tmp using: #:<pre> #:: oem_setup_env #:: mkdir /tmp/<backup-folder> #:: exit #:</pre> # Then take backup via: #:<pre> #:: #IOS backup including base code, fixes, drivers, etc. #:: backupios -file /tmp/<backup-folder>/<backup-filename>.mksysb -mksysb -nomedialib #:: #:: #User defined virtual device backup #:: viosbr -backup -file /t...")
- 07:27, 22 July 2022 Saurabh talk contribs created page Configure NTP client on AIX (Created page with "Home > VOIS or AIX > Configure NTP client on AIX To configure NTP client on AIX use: # Assuming DNS is working or configured as per Configure DNS via resolv.conf on AIX. We should be able to ping the desired ntp servers such as pool.ntp.org or time.google.com via DNS. # Synchornize time with suitable NTP server #:<pre> #:: ntpdate -d ip.address.of.server #:</pre> #: For example #::<pre> #::: ntpdate -d pool.ntp.org #::</pre> #:: '''Note that t...")
- 07:09, 22 July 2022 Saurabh talk contribs created page Configure DNS via resolv.conf on AIX (Created page with "Home > VOIS or AIX > Configure DNS via resolv.conf on AIX As per https://www.ibm.com/docs/en/aix/7.2?topic=formats-resolvconf-file-format-tcpip we need to directly create /etc/resolv.conf file on AIX to configure DNS. The syntax is similar to modern Unix systems such as: <pre> domain DomainName nameserver <Address1> nameserver <Address2> </pre> For example: <pre> domain example.com nameserver 10.1.1.1 nameserver 10.2.2.2 </pre> Main Page|Hom...")
- 07:06, 22 July 2022 Saurabh talk contribs created page Configure Date and Time on VOIS (Created page with "Home > VOIS or AIX > Configure Date and Time on VOIS =Configure Date and Time on VOIS= To configure date and time on VOIS use below steps: # Run below to get root shell #:<pre> #:: oem_setup_env #:</pre> # Open the configuration manager #:<pre> #:: smit #:</pre> # Go through following options to configure date and time ## Select "System Environments" ## Select "Change / Show Date and Time" ## Select "Change / Show Date & Time" ## Change required pa...")
- 06:54, 22 July 2022 Saurabh talk contribs created page VOIS or AIX (Created page with "Home > VOIS or AIX =VOIS= *Configure Date and Time on VOIS =AIX= *Configure DNS via resolv.conf on AIX *Configure NTP on AIX Home > VOIS or AIX")
- 05:35, 21 July 2022 Saurabh talk contribs created page CRM cluster on Suse Miscellaneous notes (Created page with "Home > Suse > SAP setup and maintenance > CRM cluster on Suse Miscellaneous notes =Accessing cluster via web interface= Access cluster via https://<hostname-or-ip>:7630/ (Hawk) and login via appropriate user such as hacluster.")
- 05:26, 21 July 2022 Saurabh talk contribs created page Checking SAP application ASCS/ERS status (Created page with "Home > Suse > SAP setup and maintenance > Checking SAP application ASCS/ERS status =ASCS / ERS status= As explained at https://blogs.sap.com/2021/10/28/sap-ascs-high-availability-using-ers-explained/ we use ASCS / ERS replication to ensure high availability of application. For checking whether ASCS / SRS are running on which nodes we can use either cluster command such as: <pre> #RHEL pcs cluster status #OR pcs status #Suse crm status </pr...")
- 04:03, 21 July 2022 Saurabh talk contribs created page Checking HANA DB replication status (Created page with "Home > Suse > SAP setup and maintenance > Checking HANA DB replication status The HANA database would have a ID such as ABC. In that case use following steps to check database replication status # Login into server as root # Connect to DB admin account using #:<pre> #:: su - <abc>adm #:</pre> #: where <abc> should be replaced with HANA DB ID # First we can check which machine is primary and which is secondary via: #:<pre> #:: hdbnsutil -...")
- 04:03, 21 July 2022 Saurabh talk contribs created page CentOS 8.x SAP Pacemaker cluster miscellaneous notes (Created page with "Home > CentOS > CentOS 8.x > SAP setup and maintenance > Miscellaneous notes =Watchdog should be enabled= We can check existing cluster configuration using: <pre> pcs property show </pre> However, if one of the value is shown as: <pre> have-watchdog: false maintenance-mode: false no-quorum-policy: ignore startup-fencing: true stonith-enabled: true </...")
- 11:03, 14 July 2022 Saurabh talk contribs restored page Ntp server configuration (5 revisions)
- 10:57, 14 July 2022 Saurabh talk contribs deleted page Ntp server configuration (content was: "<yambe:breadcrumb>CentOS 6.x|CentOS 6.x</yambe:breadcrumb> =ntp server configuration= '''There are newer articles on NTP at CentOS 8.x ntp servers''' *Configure basic ntp server and client *Troubleshoot ntp issues", and the only contributor was "Saurabh" (talk))
- 07:28, 14 July 2022 Saurabh talk contribs moved page Install Nvidia P100 graphics card driver on Ubuntu 16.04 to Install Nvidia graphics card driver on Ubuntu along with cuda libraries (Improving article and also making it more generic)
- 07:26, 14 July 2022 Saurabh talk contribs created page CentOS 7.x Install nvidia drivers and cuda library (Created page with "<yambe:breadcrumb>CentOS 7.x package management|CentOS 7.x package management</yambe:breadcrumb> =CentOS 7.x Install nvidia drivers and cuda library= To install Nvidia drivers and Cuda library on CentOS 7.x use: # Do full installation of CentOS7 # Disable Selinux by editing '<tt>/etc/selinux/config</tt>' and using: #:<pre> #:: SELINUX=disabled #:</pre> #: Also do #::<pre> #::: setenforce 0 #::</pre> # Disable firewalld #:<pre> #:: systemctl stop firewalld #:: systemctl...")
- 09:16, 8 July 2022 Saurabh talk contribs created page PBS job queues resource management (Created page with "Home > CentOS > CentOS 7.x > CentOS 7.x Rocks cluster 7.0 > PBS job queues resource management In order to restrict amount of resources available to users we need to do resource management on queues and assign users / nodes or groups to queues. =Resource management for the overall Queue= * Set Maximum CPU for the queue *:<pre> *:: qmgr -c "set queue testq1 resources_max.ncpus=20" *:</pre> * Set Maximum Memory for queue *:<pre> *:: qmgr...")
- 09:06, 8 July 2022 Saurabh talk contribs created page PBS job submission and execution (Created page with "Home > CentOS > CentOS 7.x > CentOS 7.x Rocks cluster 7.0 > PBS job submission and execution =Sample pbs stress job for testing= We can test PBS installation by validating whether we are able to submit jobs and they are executing properly on various nodes using: # Install stress package on all the nodes #:<pre> #:: yum install -y stress #:</pre> #: Assumes epel, etc. are enabled as part of compute/execution node setup # Create the PBS scri...")
- 08:54, 8 July 2022 Saurabh talk contribs created page PBS job queue creation (Created page with "Home > CentOS > CentOS 7.x > CentOS 7.x Rocks cluster 7.0 > PBS job queue creation =Adding compute or execution nodes to PBS queue management= To Add the nodes in pbs login to master node and use: <pre> qmgr create node master create node compute-0-0 create node compute-0-1 quit </pre> * On each and every node ensure that *:<pre> *:: ping <master-hostname> (eg ping rocks) *:</pre> *: results in master private IP and not public IP. In...")
- 08:45, 8 July 2022 Saurabh talk contribs created page PBS setup client node (Created page with "Home > CentOS > CentOS 7.x > CentOS 7.x Rocks cluster 7.0 > PBS setup client node To install Client node use: # Download & Install pbs packages #:<pre> #:: wget http://wpc.23a7.iotacdn.net/8023A7/origin2/rl/PBS-Open/pbspro_19.1.2.centos_7.zip #:: unzip pbspro_19.1.2.centos_7.zip #:: cd pbspro_19.1.2.centos_7 #:: yum install -y pbspro-client-19.1.2-0.x86_64.rpm #:</pre> # Check master hostname in '<tt>/etc/pbs.conf</tt>' # Source various fi...")
- 08:42, 8 July 2022 Saurabh talk contribs created page PBS setup execution node (Created page with "Home > CentOS > CentOS 7.x > CentOS 7.x Rocks cluster 7.0 > PBS setup execution node To setup PBS execution node use: # Download & Install pbs packages using: #:<pre> #:: wget http://wpc.23a7.iotacdn.net/8023A7/origin2/rl/PBS-Open/pbspro_19.1.2.centos_7.zip #:: unzip pbspro_19.1.2.centos_7.zip #:: cd pbspro_19.1.2.centos_7 #:: yum localinstall -y ./pbspro-execution-19.1.2-0.x86_64.rpm #:</pre> # Edit master hostname in '<tt>/etc/pbs.conf</t...")
- 08:38, 8 July 2022 Saurabh talk contribs created page PBS setup master node (Created page with "Home > CentOS > CentOS 7.x > CentOS 7.x Rocks cluster 7.0 > PBS setup master node To setup PBS master node use: # Download pbs packages #:<pre> #:: wget http://wpc.23a7.iotacdn.net/8023A7/origin2/rl/PBS-Open/pbspro_19.1.2.centos_7.zip #:: unzip pbspro_19.1.2.centos_7.zip #:</pre> # Install PBS on master server #:<pre> #:: cd pbspro_19.1.2.centos_7 #:: yum localinstall -y ./pbspro-server-19.1.2-0.x86_64.rpm #:</pre> # Edit pbs conf file ('<t...")
- 08:26, 8 July 2022 Saurabh talk contribs created page PBS pre-requisites (Created page with "Home > CentOS > CentOS 7.x > CentOS 7.x Rocks cluster 7.0 > PBS pre-requisites Following pre-requisites are required for PBS to work: # Nodes should resolve each other using short-names and FQDN such rocks2, rocks2.local to their private IP. This is taken care of by rocks cluster #: Might require fixing /etc/hosts on compute nodes to point to master FQDN via private IP instead of master public IP # There should be password-less SSH betwee...")
- 08:22, 8 July 2022 Saurabh talk contribs created page PBS Theory (Created page with "Home > CentOS > CentOS 7.x > CentOS 7.x Rocks cluster 7.0 > PBS Theory The related documentation is on installing PBS Pro packages in which there are three types of nodes: ; pbspro-server : This should be installed on one node (or two if you employ failover) in your cluster where the server and scheduler will run. Most admins prefer not to run jobs on this node, but it is certainly possible. This RPM also installs everything you would get...")
- 04:45, 5 July 2022 Saurabh talk contribs created page Setting up VDI machines with virtual Nvidia graphics card (Created page with "Home > VMWare platform > VMWare Horizon > Setting up VDI machines with virtual Nvidia graphics card In case of VDI the physical server can have graphics card such as Nvidia A40 and then we can associate smaller virtual slices of this Graphics card with VMs to give small amount of graphics memory + CPU to the VM. This can help with 3D applications performance in the VDI environment. =Downloading Nvidia software from site= To download Nvidia so...")
- 04:21, 5 July 2022 Saurabh talk contribs created page Configure IIS for additional file extensions and mime types (Created page with "Home > Windows > Microsoft IIS Web server > Configure IIS for additional file extensions and mime types If we try to put new types of files such as .pem, .cer which are not recognized by IIS by default in webroot (C:\Inetput\wwwroot) or its subfolders then they do not get downloaded when requested via the web URL. To enable serving such files by IIS Web server we need to associate their extension with appropriate mime type using: # For this g...")
- 04:19, 5 July 2022 Saurabh talk contribs created page Microsoft IIS Web server (Created page with "Home > Windows > Microsoft IIS Web server *Configure IIS for additional file extensions and mime types")
- 07:53, 20 June 2022 Saurabh talk contribs created page Disable password complexity at AD policy level (Created page with "Home > Windows > Active Directory > [[Disable password complexity at AD policy level] To disable AD password complexity use: # Go to either "Group policy editor" at AD level or "Local policy editor" at machine level or both # Go to Computer Computer Configuration -> Windows Settings -> Security Settings ->Password Policy # Change the complexity and password aging as per requirement # At AD level from administrator cmd run #:<pre> #:: gpupdate /fo...")
- 06:51, 20 June 2022 Saurabh talk contribs created page VxRail RASR SD card reset using RASR ISO (Created page with "Home > VMWare platform > VxRail > VxRail RASR SD card reset using RASR ISO If reset of node via SD Card as explained at Factory reset VxRail 4.7 server is not working then we can try reimaging the SD card itself using: =RASR Reset using RASR ISO= # In Web browser, open iDRAC web UI and launch virtual console. # In the Virtual Console window, click Virtual Media tab and select Connect Virtual Media. # Select Virtual Media again, and then s...")
- 06:47, 20 June 2022 Saurabh talk contribs created page Delete horizon protected images or VMs or templates (Created page with "Home > VMWare platform > VMWare Horizon > Delete horizon protected images or VMs or templates To delete Horizon protected VMs use: # Login into existing connection server as domain user #: This can also be a different / new connection server deployed afresh and connected to same vCenter where old horizon protected VMs / templates or images need to be deleted # Open an administrative cmd # Go to folder using #:<pre> #:: cd C:\Program Files\VMw...")
- 06:36, 20 June 2022 Saurabh talk contribs created page Windows Server 2019 activation via proxy or via phone (Created page with "Home > Windows > Windows Server 2019 > Windows Server 2019 activation via proxy or via phone We can activate any modern Windows including Windows Server 2019 via proxy using: # Through server manager -> Local server: ## Disable IE enchanced mode configuration ## Configure correct timezone as per requirement # Configure proxy in Internet explorer such that you can open https://www.google.co.in. If proxy requires authentication enter username an...")
- 06:11, 20 June 2022 Saurabh talk contribs created page Configure MSSQL events database server (Created page with "Home > VMWare platform > VMWare Horizon > Configure MSSQL events database server =MS SQL server installation= To setup MS SQL server use: # Run SQLEXPR installer # Choose "New SQL Server stand-alone installation or add features to an existing installation" # In popup window, accept the license, click next # Choose "Use Microsoft update to check for updates(recommended)", click next # In feature selection page, leave default settings, click next...")
- 08:26, 16 June 2022 Saurabh talk contribs created page Configuring a windows file server for user data (Created page with "Home > VMWare platform > VMWare Horizon > Configuring a windows file server for user data In case of Horizon setup, once users log into their VDI machines, ideally they should not keep any data locally. Hence it is possible to map some shared storage to them via DEM or manually. In either case a Windows based file server is required. =Building a Windows file sharing server in Windows 2019= To build Windows 2019 based file sharing server re...")
- 08:48, 22 May 2022 Saurabh talk contribs created page CentOS 9.x tar (Created page with "Home > CentOS > CentOS 9.x > CentOS 9.x Command line tools and utilities > CentOS 9.x tar =Resume a tar.gz command that was killed= Support a file is being created using: <pre> tar czf backup.tar.gz /mnt/backup </pre> But the process is killed in between. Now instead of re-compressing all the files which are part of backup.tar.gz already, it is possible to create another .tar.gz file with remaining data. To do that use: <pre> cd ~ tar ztf...")
- 08:43, 22 May 2022 Saurabh talk contribs created page CentOS 9.x Command line tools and utilities (Created page with "Home > CentOS > CentOS 9.x > CentOS 9.x Command line tools and utilities *CentOS 9.x tar")
- 13:02, 21 May 2022 Saurabh talk contribs created page Creating Golden image for Windows OS (Created page with "Home > VMWare platform > VMWare Horizon > Creating Golden image for Windows OS To create Golden image for Windows OS: =VM Creation= Create VM with following hardware configuration: # Select required no. of CPUs # Select desired memory. #: Expand the Memory section. #: Select Reserve all guest memory (All locked). # Choose appropriately sized hard disk, Choose Thin disk type #: Note that very large hard-disk will take time due to sdelete etc....")
- 12:40, 21 May 2022 Saurabh talk contribs created page Creating Windows 2019 or Windows 10 Desktop Pool (Created page with "Home > VMWare platform > VMWare Horizon > Creating Windows 2019 or Windows 10 Desktop Pool =Theory= There are three types of pools: ;Manual pool : We can create VMs and install Horizon agent. Then we can add them to Manual pool. This can be used to add physical Desktops / Servers etc. also to the horizon for connection server / UAG based remote access ;RDS pool : Once we create RDSH farm, we can create RDS pool as described in detail at Cre...")
- 11:21, 21 May 2022 Saurabh talk contribs created page CentOS 9.x Configure basic NFSv4 server for sharing folders between two machines (Created page with "Home > CentOS > CentOS 9.x > CentOS 9.x file sharing > CentOS 9.x NFS > CentOS 9.x Configure basic NFSv4 server for sharing folders between two machines There is older article on this at CentOS 7.x Configure basic NFSv4 server for sharing folders between two machines To configure CentOS 9.x based NFS server use: # Disable SELinux by editing '<tt>/etc/sysconfig/selinux</tt>' and setting: #:<pre> #:: SELINUX=disabled #:</pre> #: Al...")
- 11:18, 21 May 2022 Saurabh talk contribs created page CentOS 9.x NFS (Created page with "Home > CentOS > CentOS 9.x > CentOS 9.x file sharing > CentOS 9.x NFS *CentOS 9.x Configure basic NFSv4 server for sharing folders between two machines")
- 11:17, 21 May 2022 Saurabh talk contribs created page CentOS 9.x file sharing (Created page with "Home > CentOS > CentOS 9.x > CentOS 9.x file sharing *CentOS 9.x NFS")
- 11:17, 21 May 2022 Saurabh talk contribs created page CentOS 9.x (Created page with "Home > CentOS > CentOS 9.x *CentOS 9.x file sharing")
- 03:27, 20 May 2022 Saurabh talk contribs created page Creating RDSH Automatic Instant Clone Farms (Created page with "Home > VMWare platform > VMWare Horizon > Creating RDSH Automatic Instant Clone Farms =Theory= In case of Desktop OS pools with dedicated VM per user we can create the pool directly using Golden images as explained at Creating Windows 2019 or Windows 10 Desktop Pool. However in case of RDSH shared desktop pools using Windows server OS where a single VM can be used by multiple users concurrently, we need to first create a farm of RDS hosts...")
- 02:59, 20 May 2022 Saurabh talk contribs created page AD Configuration required for various Windows RDSH or Desktop pools (Created page with "Home > VMWare platform > VMWare Horizon > AD Configuration required for various Windows RDSH or Desktop pools For users to be able to remotely login into the VMs created as part of Horizon, we need to create following OUs, groups and policies: # Open Active Directory users and computers ## Create OU for VDI ## Create new sub=OU for VMs ## Create group for Desktop pool users under main VDI OU. If you are planning to create five different VDI po...")
- 02:47, 20 May 2022 Saurabh talk contribs created page Horizon Connection server installation (Created page with "Home > VMWare platform > VMWare Horizon > Horizon Connection server installation =Pre-requisites= Before setting up a Horizon connection server we should have: # Working VMWare ESXi and vCenter setup with shared storage and adequate spare hardware resources (RAM, Disk, CPU, etc.) # Working AD server along with domain administration access to AD server #: Domain AD credentials should be available as a service account without any password expiry....")
- 02:27, 20 May 2022 Saurabh talk contribs created page ESXi boot issues (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > ESXi boot issues It is possible for ESXi to not boot properly with errors such as: <pre> SINIT Authenticated Code Module detected an intel Trusted Execution Technology(TXT) problem at boot. </pre> These are caused due to TPM module. Clearing TPM module or resetting (Restarting) iDRAC does not seems to help. In such cases we need to do a cold reboot (Full poweroff and then after waiting sometim...")