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(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)- 07:19, 11 November 2024 User account Nageshwar talk contribs was created by Saurabh talk contribs
- 07:16, 11 November 2024 Saurabh talk contribs created page TP-Link switch configuring port-security to limit MAC IDs per port (Created page with "Home > Switch configuration notes > TP-Link switch configuring port-security to limit MAC IDs per port =TP-Link switch configuring port-security to limit MAC IDs per port= ==Configure port-security for limiting MAC IDs per port== To configure port-security on a TP-Link switch use at global configuration level enable per-port limit of 1 (or desired no) of MAC IDs: <source type="Bash"> mac address-table max-mac-count max-number 1 exceed-maxlearned e...")
- 07:41, 29 September 2024 Saurabh talk contribs created page CentOS 8.x Control Web panel Disable Excessive resource usage alerts from LFD (Created page with "Home > CentOS > CentOS 8.x > Email servers > Control Web panel > Disable Excessive resource usage alerts from LFD = Disabling High Resource Utilization Alerts for Specific Processes = This article explains how to disable or modify Login Failure Daemon (LFD) alerts for processes using excessive CPU time. Th...")
- 07:33, 29 September 2024 Saurabh talk contribs created page CentOS 8.x Control Web panel Disable emails for successful SSH from LFD (Created page with "Home > CentOS > CentOS 8.x > Email servers > Control Web panel > Disable emails for successful SSH from LFD = Disabling LFD Email Alerts for Successful SSH Logins = This guide explains how to disable email alerts from Login Failure Daemon (LFD) for successful SSH logins on servers configured with key-based authe...")
- 07:18, 29 September 2024 Saurabh talk contribs created page Rocky 9.x Troubleshooting boot issues (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Troubleshooting boot issues *Rocky 9.x Rebuilding Initial Ramdisk (initrd/initramfs) to solve boot issue Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x Troubleshooting boot issues|Troubleshooting boot...")
- 07:18, 29 September 2024 Saurabh talk contribs created page Rocky 9.x Rebuilding Initial Ramdisk (initrd/initramfs) to solve boot issue (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Troubleshooting boot issues > Rebuilding Initial Ramdisk (initrd/initramfs) = Rebuilding Initial Ramdisk (initrd/initramfs) in Rocky Linux 9.x = This article provides steps to rebuild the initial ramdisk (initrd/initram...")
- 07:09, 29 September 2024 Saurabh talk contribs created page Get secret value from TOTP based QR code for saving in text format (Created page with "Home > Online tools and utilities > Get secret value from TOTP based QR code for saving in text format = Converting TOTP QR Codes to Text Values = This article explains how to convert Time-based One-Time Password (TOTP) QR codes to their underlying text values using an online tool. This process is useful for sharing TOTP-based two-factor authentication (2FA) between multiple users or devices. == Introduction == TOTP is a common method for impl...")
- 07:57, 4 August 2024 Saurabh talk contribs created page Troubleshooting ram usage or out of memory issues with proxmox (Created page with "Home > Debian > Proxmox virtual environment > Troubleshooting ram usage or out of memory issues with proxmox If there is issue being faced related to RAM usage and if even worse some VMs are getting killed by OOM (Out of Memory) Killer then we can use following steps to investigate further. # Look at total memory allocated to VM and total physical memory. # Also look at whether balooning with minimum and maximum values has been enabled. # Do...")
- 07:35, 4 August 2024 Saurabh talk contribs created page Configure external syslog server on NSX manager for central logging or SIEM purposes (Created page with "Home > VMWare platform > VMWare NSX > Configure external syslog server on NSX manager for central logging or SIEM purposes Configuring syslog server on NSX requires doing SSH to cluster IP / NSX manager IP and using: <pre> set logging-server <syslog-server> proto udp level info </pre> Later we can validate settings via: <pre> get logging-servers </pre> After this we still need to go to Distributed firewall and for each firewall rule enable op...")
- 07:31, 4 August 2024 Saurabh talk contribs created page Renew NSX Manager certificates (Created page with "Home > VMWare platform > VMWare NSX > Renew NSX Manager certificates To renew NSX manager certificates use following steps: # Login into NSX manager or NSX manager cluster # Go to System -> Certificates -> CSR # Select one certificate at a time and enable self-sign for it for 825 days (More than this may not be acceptable by NSX manager UI). # '''After the self-signed certificates are renewed''' go to System -> Fabric -> Compute Managers # Edit...")
- 06:12, 4 August 2024 Saurabh talk contribs created page Install an additional CA certificate as trusted at the OS level in VMware Photon 4.0 OS (Created page with "Home > VMWare platform > VMWare Platform Miscellaneous > Install an additional CA certificate as trusted at the OS level in VMware Photon 4.0 OS To install an additional CA certificate as trusted at the OS level in VMware Photon 4.0 OS, you can follow these steps: # Obtain the CA Certificate: #: Ensure you have the CA certificate file (e.g., `mycertificate.pem`) that you want to add as a trusted certificate. # Copy the Certificate to the Appro...")
- 06:08, 4 August 2024 Saurabh talk contribs created page Delete millions of objects and terabytes of data from an AWS S3 bucket (Created page with "Home > Amazon web services > Delete millions of objects and terabytes of data from an AWS S3 bucket To delete millions of objects and terabytes of data from an AWS S3 bucket, the most efficient and recommended method is to use S3 Lifecycle configuration rules. Here's a detailed explanation of how to do this: # Use S3 Lifecycle Configuration: #:Setting up a lifecycle policy is the most effective way to delete large amounts of data from an S3 bucket...")
- 05:17, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Ventoy (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > File system management > Rocky 9.x Ventoy It is better to use Ventoy to have multiple OS installers on a single USB in comparison to dd approach or Rufus or some live USB creator. For creating bootable USB via Ventoy use: # Go to https://www.ventoy.net/en/download.html and download Linux .tar.gz file...")
- 05:06, 10 April 2024 Saurabh talk contribs created page Rocky 9.x loginctl (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl > Rocky 9.x loginctl It is possible for user session to end abruptly and hence not visible in output of: <pre> w </pre> In such cases if they have existing loginctl / systemd session we can see such sessions via: <pre> loginctl list-sessions </pre> We can grep units related to listed session ID via: <...")
- 05:02, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Debugging systemd issues (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl > Rocky 9.x Debugging systemd issues At times we may need to debug systemd if we dont know what is going on or especially if some command is running via systemd but we dont know which unit/service is responsible for running this command. In such cases enable debug option in systemd using: # Edit '<tt>/...")
- 04:55, 10 April 2024 Saurabh talk contribs created page Rocky 9.x journalctl options (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl > Rocky 9.x journalctl options =Logs after current boot (-b)= We can use below to see logs post current boot: <pre> journalctl -b </pre> This can be useful if we want to debug some service which is not running eg mariadb / sshd etc. and we have tried to start it manually after current boot perhaps after...")
- 04:43, 10 April 2024 Saurabh talk contribs created page Rocky 9.x systemd or systemctl (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl *Rocky 9.x systemd service file configuration options '''There are older articles on this at:''' *CentOS 8.x systemd or systemctl *Systemd Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or...")
- 04:43, 10 April 2024 Saurabh talk contribs created page Rocky 9.x systemd service file configuration options (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x systemd or systemctl > Rocky 9.x systemd service file configuration options =OnBootSec= The OnBootSec option in systemd services is used to define a timer relative to the boot time of the system. This timer is triggered when the system has finished booting up and is expressed in seconds. It is primarily useful when configur...")
- 04:32, 10 April 2024 Saurabh talk contribs created page Sonicwall firewall Configure remote user access SSL VPN (Created page with "Home > Enterprise security devices or applications > Sonicwall firewall > Sonicwall firewall Configure remote user access SSL VPN To configure remote access SSL VPN with Sonicwall firewall use: # Identify a public WAN interface with static IP for configuring remote access VPN. Note the interface name and public IP. # Go to Manage -> Connecitivity -> VPN -> Base settings # Click on Add to create a new VPN settings for selected ISP public IP # I...")
- 04:22, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Backup Tools (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools *Rocky 9.x rsync '''Older notes on rsync are available at:''' *CentOS 8.x rsync *Rsync Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools")
- 04:22, 10 April 2024 Saurabh talk contribs created page Rocky 9.x rsync (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools > Rocky 9.x rsync *Rocky 9.x rsync copy files with paths mentioned in a text file Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools > Rocky 9.x rsync")
- 04:22, 10 April 2024 Saurabh talk contribs created page Rocky 9.x rsync copy files with paths mentioned in a text file (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Backup Tools > Rocky 9.x rsync > Rocky 9.x rsync copy files with paths mentioned in a text file If we need to rsync only specific files and not all sub-folders and files and the path of files to be synced in captured in a text file then we can use following rsync syntax: <pre> rsync -av --files-from=yourfilelist.txt /sourcedirectory/ /destination/ </pre> Here, because of use of...")
- 04:16, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Owncloud client via AppImage (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud > Rocky 9.x Owncloud client via AppImage Latest owncloud client are packaged as AppImage. They can be installed using: # (Optionally) Changed the gnome desktop display to "Standard (X11 Display manager)" from "Standard (Wayland)". This is not mandatory for owncloud to work on Rocky 9.2 onwards. # Check for latest release...")
- 04:10, 10 April 2024 Saurabh talk contribs created page Stacking netgear switches (Created page with "Home > Switch configuration notes > Stacking netgear switches To stack two Netgear M4300-24X switches using cli use below steps: # Identify the ports to be used for stacking. These could be either 1 or 2 stack ports, depending upon need and availability. Ensure we have appropriate cables to connect these ports (DAC, copper, LC-LC, etc.). '''Dont connect these cables yet. We will connect during reboot in future steps'''. # Ideally stack switches...")
- 04:02, 10 April 2024 Saurabh talk contribs created page Doing XFS repair for LVM volumes that are auto mounted by cluster configuration (Created page with "Home > Suse > SAP setup and maintenance > Doing XFS repair for LVM volumes that are auto mounted by cluster configuration If there is issue with xfs filesystem due to which it is not getting mounted then crm status may show errors such as: <pre> xml <rsc_order idFailed Resource Actions: * rsc_fs_ASCS02_sapEXAas_start_0 on exaprdapp01 'unknown error' (1): call=105, status=complete, exitreason='Couldn't mount device [/dev/usrsapEXAASCS02VG/usrsap...")
- 03:39, 10 April 2024 Saurabh talk contribs created page Rocky 9.x Rate limiting connections to apache (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Web Servers > Apache '''This has not been tested practically. There could be mistakes / errors in below steps'''. =Rate limit incoming connections using iptables recent module= We can achieve rate limiting using `firewalld`, which interfaces with `iptables` in the backend. The process involves creating direct `firewalld` rules...")
- 09:40, 9 April 2024 Saurabh talk contribs created page Rocky 9.x Ansible installation (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Package management > Rocky 9.x Ansible installation To install ansible on Rocky 9.x use: <pre> dnf -y install ansible-core </pre> Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Rocky 9.x Package management|Package mana...")
- 09:38, 9 April 2024 Saurabh talk contribs created page Rocky 9.x Podman (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization > Rocky 9.x Podman *Rocky 9.x podman basics '''There are older articles on podman at CentOS 8.x podman''' Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization > Rocky 9.x Podman")
- 09:38, 9 April 2024 Saurabh talk contribs created page Rocky 9.x podman basics (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization > Rocky 9.x Podman > Rocky 9.x podman basics =Installation= For installation use: <pre> dnf -y install podman podman version podman info </pre> =Download rockylinux9 image= For rocky9 podman images use: <pre> podman image search rocky podman pull docker.io/library/rockylinux:9.0 podman image list -a #Or simply "podman images" </pre> =Move podman containe...")
- 09:35, 9 April 2024 Saurabh talk contribs created page Rocky 9.x virtualization (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization *Rocky 9.x Podman Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x virtualization")
- 03:41, 4 April 2024 Saurabh talk contribs created page End point security (Created page with "Home > Security tips > End point security *SentinelOne Home > Security tips > End point security")
- 03:41, 4 April 2024 Saurabh talk contribs created page SentinelOne (Created page with "Home > Security tips > End point security > SentinelOne *Create path exclusion in SentinelOne Home > Security tips > End point security > SentinelOne")
- 03:41, 4 April 2024 Saurabh talk contribs created page Create path exclusion in SentinelOne (Created page with "Home > Security tips > End point security > SentinelOne > Create path exclusion in SentinelOne Sometimes application such as end-point backup may not work properly if we have SentinelOne based End-point protection as backup tools will try to work with Volume Shadow Copy (VSS) and other OS files. In that case we may have to create interoperability exclusion for the backup tool for it to work properly. To create a path exclusion in Sentinel...")
- 03:17, 4 April 2024 Saurabh talk contribs created page Useful Windows cmd options (Created page with "Home > Windows > Windows Desktop Tools or Utilities > Useful Windows cmd options =Calculate hash such as md5 or sha1 for a file in Windows= To calculate hash of a file in Windows use: <pre> certutil -hashfile <path\filename.ext> <hash-algorithm> </pre> Where <hash-algorithm> can be MD5, SHA1, SHA256 or SHA512. Home > Windows > Windows Desktop Tools or Utilities > Useful Windows cmd options")
- 09:03, 28 March 2024 Saurabh talk contribs created page Zentyal unable to ping gateway from zentyal server (Created page with " Home > Zentyal > Zentyal unable to ping gateway from zentyal server After deploying Zentyal as internal server with just one interface (no proxy / Gateway feature), from SSH prompt we are unable to ping the gateway IP from the Zentyal server. This is after adding ICMP allowed in all four types of packet filter. Note that from other machines we are able to ping Zentyal (Incoming). Only outgoing ping to gateway from Zentyal was found not to be w...")
- 09:01, 28 March 2024 Saurabh talk contribs created page Zentyal (Created page with " Home > Zentyal *Zentyal Configure local recursive DNS for LAN systems Home > Zentyal")
- 09:01, 28 March 2024 Saurabh talk contribs created page Zentyal Configure local recursive DNS for LAN systems (Created page with " Home > Zentyal > Zentyal Configure local recursive DNS for LAN systems To configure Zentyal DNS service as local recursive DNS for LAN systems use: # ssh to zentyal as normal user and use "sudo su -" to get root access # Edit file '<tt>/etc/zentyal/dns.conf</tt>' (Path for this in below reference link is wrong) with #:<pre> #:: intnets = 10.0.0.0/8, 172.16.0.0/12, 192.168.0.0/16 #:</pre> # I could not find option to restart DNS service so I chos...")
- 08:16, 28 March 2024 Saurabh talk contribs created page Paloalto firewall clear application usage data (Created page with "Home > Enterprise security devices or applications > Paloalto firewall > Paloalto troubleshooting options > Paloalto firewall clear application usage data On the Policy -> security page we can see some values related to each rule such as: * When was the rule created * When was it last modified * No. of hits etc. Along with this we also see a link showing count / types of application identified/allowed based on that rule. In most organizati...")
- 08:08, 28 March 2024 Saurabh talk contribs created page Solve 2x2 Rubik's cube (Created page with " Home > Hardware > Solve 2x2 Rubik's cube =Notation= There are six notations for: ; L : Left ; R : Right ; U : Up ; D : Down ; F : Front ; B : Back In these if the notations are same as above then we need to rotate clock-wise. Assume clock to be present on the floor, on the wall on the left and on the wall on the front. Accordingly calculate clockwise for both U/D (Clock on floor), L/R (Clock on left wall) and F/B (Call on wall in front of you)...")
- 04:53, 26 February 2024 Saurabh talk contribs created page Malware download links (Created page with "Home > Security tips > Malware download links During a recent testing of XDR needed a few malware to see if XDR can even detect these based on AI / heuristics without depending too much on hashes. For that downloaded required malware from: * https://www.ikarussecurity.com/en/private-customers/download-test-viruses/ * https://www.spyshelter.com/security-test-tool/ * https://www.wicar.org/test-malware.html * http://www.tekdefense.com/downloads/malw...")
- 04:30, 26 February 2024 Saurabh talk contribs created page AI tools (Created page with "Home > Online tools and utilities > AI tools By using Very large language models we see emergent behavior and capabilities that we do not see in other smaller models. With the rise of LLMs we have a large no. of AI tools at disposal. Some of them are described below. =Used tools= ; https://www.perplexity.ai/ : This allows asking very specific queries and getting a precise answer. The best part of this tool is precision and also references based...")
- 03:58, 26 February 2024 Saurabh talk contribs created page Suse working with SMT server (Created page with "Home > Suse > Suse working with SMT server =About SMT= To help with product updates and registrations centrally via a local server without requiring each server to have outgoing connectivity directly to Suse Customer Center (SCC) or Internet. This also helps in avoiding repeat download of OS update packages for each server over WAN link. =Error while registering an internal machine with local SMT= We might see error such as below while using lo...")
- 03:30, 26 February 2024 Saurabh talk contribs created page Reset ESXi root password (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Reset ESXi root password Official KB at https://kb.vmware.com/s/article/1317898 suggests only option to reset password in ESXi 3.5 and above is by reinstalling. However as per referece link we have a few other options such as: '''Note that the below options are not validated in production yet''' ; Host profiles : Via vCenter extract existing host's host-profile. Then edit the host profile an...")
- 10:04, 25 February 2024 Saurabh talk contribs created page Useful Windows powershell options (Created page with "Home > Windows > Windows Desktop Tools or Utilities > Useful Windows powershell options =Test-NetConnection= We can test network connectivity to a remote computer / port via: <pre> Test-NetConnection [[-ComputerName] <String>] -Port <Int32> [-InformationLevel <String>] [<CommonParameters>] </pre> For exmaple: <pre> Test-NetConnection -ComputerName 10.1.1.1 -Port 443 -InformationLevel "Detailed" </pre> This can be a useful alternative to Linux...")
- 09:30, 25 February 2024 Saurabh talk contribs created page Rocky 9.x Issues while connecting to some wireless networks using Broadcom wireless (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration > Rocky 9.x Issues while connecting to some wireless networks using Broadcom wireless For messages such as below repeated multiple times in '<tt>/var/log/messages</tt>': <pre> Feb 25 13:45:28 barjatiyarklp wpa_supplicant[1660]: wlp3s0: CTRL-EVENT-SCAN-FAILED ret=-22 retry=1 </...")
- 04:13, 20 February 2024 Saurabh talk contribs created page Live Optics (Created page with "Home > VMWare platform > VMWare Platform Miscellaneous > Live Optics =Getting current resource utilization= We can use liveoptics for getting current resource utilization such as: * 95% IOPS * Peak and 95% CPU usage * Peak and 95% memory usage * Overall storage usage etc. for a physical host, hypervisor such as Hyper-V or ESXi, etc. This information is critical if we are trying to size a new environment during migration - P2V or V2V or hard...")
- 04:07, 20 February 2024 Saurabh talk contribs created page RVTools (Created page with "Home > VMWare platform > VMWare Platform Miscellaneous > RVTools =Getting information about ESXi or vCenter environment= We can get detailed information about ESXi or vCenter environment including information on health issues such as: * Connected CD/DVD drive * CPU/Memory configuration issues * Zombie disks by using RV tools. We only need to give ESXi host / vCenter information (IP, Username, Password) and then within a minute we can see all t...")
- 12:39, 4 December 2023 Saurabh talk contribs created page Securing organizations IT infrastructure from modern threats (Created page with "Home > Security tips > Securing organizations IT infrastructure from modern threats To secure an organization against modern threats consider following: ; User VLANs gateway at firewall : All VLANs should be only L2 at core / distribution / access level. Gateway for all users should be at perimeter firewall. All traffic between two user VLANs should go via firewall. : In this case have separate VLANs for printers, Biometric devices, CCTV, etc....")
- 05:47, 12 November 2023 Saurabh talk contribs created page Rocky 9.x Network Configuration (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration *Rocky 9.x Look at network interface statistics Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration")
- 05:47, 12 November 2023 Saurabh talk contribs created page Rocky 9.x Look at network interface statistics (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > System Administration > Network Configuration > Look at network interface statistics =Look at per interface statistics= Per-interface statistics can be seen at: <pre> /sys/class/net/<interface-name>/statistics </pre> Refer: * https://stackoverflow.com/questions/349576/linux-re...")
