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• 09:19, 12 September 2022 Saurabh talk contribs created page Deploy vHMC virtual appliance and go through Install Wizard (Created page with "Home > VIOS or AIX > Deploy vHMC virtual appliance and go through Install Wizard vHMC can be deployed on top of VMWare (ESXi) or KVM hypervisors. To deploy it on vSphere use following steps: # Choose option to deploy OVA/OVF file from vSphere web client # Give appropriate VM name as per requirement and choose downloaded ova file from local disk to deploy vHMC # Choose appropriate Datastore, Network, Thin/Thick disk, etc. to deploy the VM # After o...")
• 05:48, 12 September 2022 Saurabh talk contribs created page Enabling photo viewer in Windows Server 2019 (Created page with "Home > Windows > Windows Server 2019 > Enabling photo viewer in Windows Server 2019 Home > VMWare platform > VMWare Horizon > Enabling photo viewer in Windows Server 2019 In case of Server 2019 machine being used as Desktop (eg RDSH VDI scenario), it might be useful to change default photo application from paint to photo viewer using: # Go to '<tt>C:\Program Files (x86)\Windows Photo Viewer</tt>' and look for DLLs rel...")
• 03:20, 12 September 2022 Saurabh talk contribs created page Configure NSX-T exclusion list (Created page with "Home > VMWare platform > VMWare NSX > Configure NSX-T exclusion list Sometimes it is desired to exclude a few VMs such as NSX controller cluster / NSX manager cluster, vCenter, AD etc. from NSX so that even if we make a mistake in writing an NSX distributed firewall policy, we can at least login into vCenter / NSX manager etc. and revert the changes. To configure a group (list) of VMs that should be excluded from NSX policies use: # Login int...")
• 06:33, 30 August 2022 Saurabh talk contribs created page Upgrading 12SP4 LPAR to 15SP1 (Created page with "Home > VIOS or AIX > Upgrading 12SP4 LPAR to 15SP1 To upgrade 12SP4 LPAR to 15SP1 use: # Connect two virtual optical drivers (one for installer and one for packages). See Add Virtual Optical Media to LPAR with desired OS ISO image # Start "Upgrade" option after booting through CD using "System management services". See Activating the LPAR (Starting) #* Press up/down arrow to get grub # Ideally we should have taken a backup of system (root...")
• 06:29, 30 August 2022 Saurabh talk contribs created page Backup of LPAR by booting into Suse installer DVD rescue mode (Created page with "Home > VIOS or AIX > Backup of LPAR by booting into Suse installer DVD rescue mode To take disk level image backup of LPAR to a remote location use: # We should have a backup destination with dd, nc installed. It can be a Linux machine (Physical or VM) or in case of Windows install Cygwin with ddrescue and nc also selected along with default packages. # Boot the LPAR via "System Management Service" so that we can go to rescue mode of CD. (Suse12S...")
• 06:26, 30 August 2022 Saurabh talk contribs created page Installing Suse 12SP4 in LPAR (Created page with "Home > VIOS or AIX > Installing Suse 12SP4 in LPAR After Activating the LPAR (Starting) to boot via Suse 12SP4 installed DVD (See Uploading a new OS ISO to VIOS Library and Add Virtual Optical Media to LPAR with desired OS ISO image), we can install OS using: # After existing "System Management Service" via grub choose option of "Installation". #* You may have to press up-down arrow to get grub menu #* Careful avoid left-right arrow....")
• 06:24, 30 August 2022 Saurabh talk contribs created page Activating the LPAR (Starting) (Created page with "Home > VIOS or AIX > Activating the LPAR (Starting) After Create LPAR and Add Virtual Optical Media to LPAR with desired OS ISO image we can activating the created LPAR and boot it using attached virtual optical media using: # Login into vHMC # Go to Power server # Select the LPAR. From Actions menu choose "Activate" # To boot via virtual optical CD/DVD in "Activation Options" expand "Advanced Settings" against "Boot Mode" select "System M...")
• 06:20, 30 August 2022 Saurabh talk contribs created page Add Virtual Optical Media to LPAR with desired OS ISO image (Created page with "Home > VIOS or AIX > Add Virtual Optical Media to LPAR with desired OS ISO image To add a virtual CD/DVD (Optical Media) to LPAR using ISO image uploaded to library (See Uploading a new OS ISO to VIOS Library ) use: # Login into vHMC # Go to LPAR created in above steps # Go to "Virtual Storage" # Go to "Virtual Optical Device" # Click on "Add Virtual Optical Device" # Give approprite Device Name (eg cd1), Select the VIOS Server, click ok. # Se...")
• 05:04, 30 August 2022 Saurabh talk contribs created page Uploading a new OS ISO to VIOS Library (Created page with "Home > VIOS or AIX > Uploading a new OS ISO to VIOS Library To upload a new OS ISO to VIOS Library (and optionally create a new library as required): # Download relevant ISO using Internet # Use "WinSCP" with scp (*and not sftp*0 to login into VIOS as padmin or root # Copy the ISO to /home/padmin (padmin) or /tmp (root). #: If copied to /home/padmim, login into putty as padmin. Use "r o". Move uploaded ISO to /tmp. # Login into vHMC # Go to Pow...")
• 05:02, 30 August 2022 Saurabh talk contribs created page Adding Root disk / storage to LPAR (Created page with "Home > VIOS or AIX > Adding Root disk / storage to LPAR To add root disk or additional storage to LPAR via vHMC: # Go to LPAR created as per Create LPAR # Go to "Virtual Storage" # In case of virtual FC storage (NPIV) ## Using "Virtual Fibre Channel" tab ##* Add virtual Fiber channel devices to the LPAR ##* Select all Fibre Channel Ports (2/4) and click ok. ##: You can see availabile port connections count (eg 61) on this screen. ## Do zoning,...")
• 05:00, 30 August 2022 Saurabh talk contribs created page Adding Virtual Network to LPAR (Created page with "Home > VIOS or AIX > Adding Virtual Network to LPAR To add Virtual network (NIC) to LPAR via vHMC use: # Go to LPAR created as per Create LPAR # Go to "Virtual Networks" # Click "Attach Virtual Network" # Select appropriate virtual network name based on site. Ideally this network should be connected to a "Virtual Network Bridge" # Click ok. Home > VIOS or AIX > Adding Virtual Network to LPAR")
• 04:59, 30 August 2022 Saurabh talk contribs created page Create LPAR (Created page with "Home > VIOS or AIX > Create LPAR To create LPAR using vHMC use: # Login into vHMC # Go to Power Server # Click on "Create Partition" on top right corner # Give appropriate Partition Name. ## Leave Partition ID to <auto assign>, Partition Type to AIX/Linux, Maximum Virtual Adapters:10 # Click on "Processor conifguration" with Processor Mode "Shared", Uncapped ## For test LPAR leave virtual processors minimum, allocated and maximum to 1 ## Processi...")
• 04:52, 30 August 2022 Saurabh talk contribs created page Using vi editing mode on shell (Created page with "Home > VIOS or AIX > Using vi editing mode on shell We can use following to enable vi editing mode on shell: <pre> set -o vi </pre> After this we can do the following at least: ;Esc + v : Escape takes to control mode and then v is for editing the line in vi. After editing we can use :wq to execute the typed command 'Esc + k : Escape takes to control mode and then k takes to previous command in history. More on this at https://www.ibm.com/docs/...")
• 15:12, 24 August 2022 Saurabh talk contribs moved page Nessuss to Nessus (Corrected name)
• 07:52, 17 August 2022 Saurabh talk contribs created page Disable hot plug and unplug for NIC and USB for clients (Created page with "Home > VMWare platform > VMWare Horizon > Disable hot plug and unplug for NIC and USB for clients When users connect to Horizon VDI via Horizon client, they get option to unplug both USB and NIC. USB unplug is useful to safely remove USB device, but NIC unplug disconnections the VM. After that we need to remove the old NIC from the VM at vSphere/vCenter level and reconfigure the VM with same IP on a new NIC. To avoid all this we can disable...")
• 07:44, 17 August 2022 Saurabh talk contribs created page Configure RDSH licensing server and client for VDI (Created page with "Home > VMWare platform > VMWare Horizon > Configure RDSH licensing server and client for VDI By default the Windows Server 2019 VMs might allow RDSH via VDI RDSH pools to work only till 180 days. For any extended usage perhaps license is required. To setup a RDSH licensing server and client use below steps: =Get Microsoft licensing ID for the organization= The next sections explain server setup using "Agreement No". To find Agreement No fo...")
• 07:08, 17 August 2022 Saurabh talk contribs created page CentOS 8.x Roundcube web based installer for Gmail IMAP and SMTP (Created page with "Home > CentOS > CentOS 8.x > Web based tools > CentOS 8.x Roundcube > CentOS 8.x Roundcube web based installer for Gmail IMAP and SMTP After installation as per CentOS 8.x Roundcube installation visit http://<server-fqdn-or-ip>/installer to proceed further as follows: # Check environment -- click NEXT button in the bottom of page # Create Config ## In database setup section, fill Database password as co...")
• 07:07, 17 August 2022 Saurabh talk contribs created page CentOS 8.x Roundcube (Created page with "Home > CentOS > CentOS 8.x > Web based tools > CentOS 8.x Roundcube *CentOS 8.x Roundcube installation *CentOS 8.x Roundcube web based installer for Gmail IMAP and SMTP There are older articles on roundcube at Roundcube configuration")
• 07:07, 17 August 2022 Saurabh talk contribs created page CentOS 8.x Roundcube installation (Created page with "Home > CentOS > CentOS 8.x > Web based tools > CentOS 8.x Roundcube > Installation To install roundcube use following steps: # Install mariadb and set roundcube database using: #:<pre> #:: dnf -y install mariadb-server #:: systemctl start mariadb #:: systemctl enable mariadb #:: mysql_secure_installation #:: #:: mysql -u root -p #:: #:: CREATE DATABASE roundcubemail; #:: CRE...")
• 13:03, 3 August 2022 Saurabh talk contribs created page Accessing partition via IVM managed hosts (Created page with "Home > VIOS or AIX > Accessing partition via IVM managed hosts We can access virtual terminal on IVM managed hosts when there is older power server and no vHMC via: # If logged in via root change to padmin user via (Or login as padmin directly) #:<pre> #:: su - padmin #:</pre> # Get the lpars names and id's #:<pre> #:: lssyscfg -r lpar -F name,lpar_id #:</pre> # Login to lpar using id #:<pre> #:: mkvt -id <lpar-id> #:</pre> # If terminal already...")
• 12:55, 3 August 2022 Saurabh talk contribs created page Accessing VIOS console via HMC console (Created page with "Home > VIOS or AIX > Accessing VIOS console via HMC console In case of emergency (unexpected boot after maintenance) we should always be able to connect to VIOS via HMC via console. This can help in recovering from some boot issues. To do the same use: # SSH to vHMC via use (eg hscroot) # Run below command #:<pre> #:: vtmenu #:</pre> # Select the appropriate power server for which we want to connect to VIOS # Select the VIOS to which we want to c...")
• 12:33, 3 August 2022 Saurabh talk contribs created page Removing disk from VIOS server (Created page with "Home > VIOS or AIX > Removing disk from VIOS server To remove disk from VIOS server use below steps: # Login to VIOS server (padmin) # Find the hdisk name of the disk to be removed using: #:<pre> #:: lspv #:</pre> #: Example output #::<pre> #:::$ $ lspv #:::NAME PVID VG STATUS #:::hdisk120 00c2eae02d3989c8 None #:::hdisk121 00c2eae095ba1018...")
• 12:26, 3 August 2022 Saurabh talk contribs moved page Configure Date and Time on VOIS to Configure Date and Time on VIOS (Spelling correction)
• 12:25, 3 August 2022 Saurabh talk contribs moved page VOIS or AIX to VIOS or AIX (Spelling correction)
• 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...")

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