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(newest | oldest) View (newer 50 | older 50) (20 | 50 | 100 | 250 | 500)- 03:38, 23 February 2023 Saurabh talk contribs created page Ubuntu 20.04 Execute command at system boot using crontab (Created page with "Home > Ubuntu > Server or Desktop administration > Ubuntu 20.04 Execute command at system boot using crontab In case of Ubuntu 20.04 if we need to execute any command after system boot (the way used to happen via /etc/rc.d/rc.local long back), we can do the same via cron using: # Type below to open cron editing for current user (eg root) #:<pre> #:: crontab -e #:</pre> # In the cron file enter command to...")
- 09:19, 17 February 2023 Saurabh talk contribs created page Ubuntu HPC NFS client on compute nodes (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > NFS client on compute nodes #Install NFS client packages on compute node #:<pre> #:: apt install -y nfs-common #:</pre> #Create mount directory #:<pre> #:: mkdir /export #:</pre> #Mount master node /export directory in compute node via '<tt>/etc/fstab</tt>' using: #:<pre> #:: <masternodename>:/export /export...")
- 08:59, 17 February 2023 Saurabh talk contribs created page Ubuntu HPC DNS setup on compute node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > DNS setup on compute node To configure correct DNS settings on compute node use: # First test DNS resolution via master using: #:<pre> #:: nslookup node<n>.<private-zone> <master-private-ip> #:</pre> # Then configure appropriate DNS and search domain using: #:<pre> #:: resolvectl domain <private-interface> <privat...")
- 08:53, 17 February 2023 Saurabh talk contribs created page Ubuntu HPC DNS setup on master node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > DNS setup on master node The nodes in HPC cluster should resolve each other via both short name and FQDN. To help with host resolution centrally, we can setup DNS on master using: # Install bind9 package using: #:<pre> #:: apt -y install bind9 #:</pre> # Edit '<tt>/etc/bind/named.conf.options</tt>' to include:<sour...")
- 08:08, 17 February 2023 Saurabh talk contribs created page Ubuntu HPC master and compute node network setup (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Master and compute node network setup After initial template is built using Ubuntu HPC Common setup of all HPC nodes, we need to differentiate between master and compute nodes from network perspective. # '''On compute nodes''' disable firewall using: #:<pre> #:: systemctl stop ufw #:: systemctl dis...")
- 07:51, 17 February 2023 Saurabh talk contribs moved page Ubuntu NFS server setup on master node to Ubuntu HPC NFS server setup on master node (Better naming)
- 07:48, 17 February 2023 Saurabh talk contribs created page Ubuntu NFS server setup on master node (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > NFS server setup on master node Create ext4 lvm partition with required space to be shared with clients. Mount created lvm partition on /export via UUID using /etc/fstab # Create home folder under /export #:<pre> #:: mkdir -p /export/home #:</pre> #Install NFS packages #:<pre> #:: apt install -y nfs-kernel-server...")
- 05:54, 15 February 2023 Saurabh talk contribs created page Ubuntu HPC Common setup of all HPC nodes (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi > Common setup of all HPC nodes Plan is to create an Ubuntu 20.04 template using below steps. Then we can clone the template to master / execution nodes and configure those nodes individually separately. For common node (template) setup use: # Install Ubuntu 20.04 Desktop with most default values. Non-root user...")
- 05:45, 15 February 2023 Saurabh talk contribs created page Ubuntu HPC setup with openpbs and openmpi (Created page with "Home > Ubuntu > HPC setup with openpbs and openmpi *Ubuntu HPC Common setup of all HPC nodes Home > Ubuntu > HPC setup with openpbs and openmpi")
- 05:32, 15 February 2023 Saurabh talk contribs created page Ubuntu Server or Desktop administration (Created page with "Home > Ubuntu > Server or Desktop administration *Package management in Ubuntu *Installing android sdk in Ubuntu *Installing Ubuntu on LVM partition *Detecting RAID partitions using Ubuntu Live CD or USB *Configuring Samba service in Ubuntu *Configuring Ubuntu machine as LDAP client *Troubleshooting Ubuntu specific issues *Installing Java on Ubuntu 12.04 x86_64 Desktop *Add U...")
- 05:32, 15 February 2023 Saurabh talk contribs created page Ubuntu Hadoop cluster setup (Created page with "Home > Ubuntu > Hadoop cluster setup *Installing Hadoop 2.2.0 on single Ubuntu 12.04 x86_64 Desktop *Installing Hadoop 2.2.0 cluster on Ubuntu 12.04 x86_64 Desktops Home > Ubuntu > Hadoop cluster setup")
- 08:24, 1 February 2023 Saurabh talk contribs created page Fortinet firewall VPN configuration (Created page with "Home > Enterprise security devices or applications > Fortigate firewall > VPN configuration =Fortinet firewall SSL VPN configuration= To configure Remote SSL VPN in fortinet use: # Go to Network -> Interfaces. See the names of WAN and LAN interfaces. Assuming VPN users will connect from WAN and then once they are connected to VPN, they need LAN access. # Go to Network -> Static route and see the networ...")
- 07:46, 29 January 2023 Saurabh talk contribs created page Removing failed disk or disk group from vSAN cluster (Created page with "Home > VMWare platform > vMWare VSAN > Removing failed disk or disk group from vSAN cluster =Removing failed capacity disk= In case of a failed capacity disk we can remove it using: # Go to Cluster -> Configure -> Disk management and view all disks in cluster. We should be able to find a failed or inaccessible disk in cluster. # Once the ESXi host is identified put the host in maintenance mode using "Ensure accessibility" option. #...")
- 07:38, 29 January 2023 Saurabh talk contribs created page Fortinet firewall basics (Created page with "Home > Enterprise security devices or applications > Fortigate firewall > Bascis =Connecting to console port in Fortigate firewall= In fortigate firewall we can connect to console using 9600 Baud rate. After connecting to console login via admin to get access to command prompt. =Fortigate firewall command access= We can open command prompt based access to fortigate firewall after login into webUI. After login on top...")
- 03:15, 5 January 2023 Saurabh talk contribs created page Rocky 8.x Desktop tools or applications (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications *Rocky 8.x Chrome Browser")
- 03:15, 5 January 2023 Saurabh talk contribs created page Rocky 8.x Chrome Browser (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > Chrome Browser *Rocky 8.x Chrome Browser solving zip file creation failed on drive.google.com")
- 03:14, 5 January 2023 Saurabh talk contribs created page Rocky 8.x Chrome Browser solving zip file creation failed on drive.google.com (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Desktop tools or applications > Chrome Browser > Rocky 8.x Chrome Browser solving zip file creation failed on drive.google.com Sometimes on drive.google.com download of folders along with sub-folders and files fails with failure of zip file creation. In such cases we can use following steps to solve the problem: # Open chro...")
- 05:05, 4 January 2023 Saurabh talk contribs created page Seeing spaces and tabs in vim (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors > vim > Seeing spaces and tabs in vim Normally we cannot differentiate between spaces and tabs in vim. However, if visualzing the difference between space and tab is important, we can use following: <pre> :set lcs=space:_,tab:>~ list </pre> Refer: * https://stackoverflow.com/questions/61221579/how-to-view-tabs-spaces-and-various-tab-rel...")
- 05:05, 4 January 2023 Saurabh talk contribs created page Rocky 8.x vim (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors > vim *Seeing spaces and tabs in vim '''There are older articles on vim at:''' *CentOS 7.x vim *Vim Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors > vim")
- 05:05, 4 January 2023 Saurabh talk contribs created page Rocky 8.x Text Editors (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors *Rocky 8.x vim Home > Rocky Linux or CentOS > Rocky Linux 8.x > Text Editors")
- 04:54, 23 December 2022 Saurabh talk contribs created page Restarting various Avamar services in Dell DP4400 (Created page with "Home > Backup server > Dell DP4400 > Restarting various Avamar services in Dell DP4400 In case when we login to ACM and we see services as stopped or failed related to Avamar, we can try to restart them via: # Login into ACM and see which services are having issues under avamar # SSH to avamar machine as admin user. #: If required perhaps default root password is avam@r # Use =dpnctl= to start / restart stopped services one by one. (gsan, mc...")
- 04:44, 23 December 2022 Saurabh talk contribs created page Dell DP4400 (Created page with "Home > Backup server > Dell DP4400 *Restarting various Avamar services in Dell DP4400")
- 04:45, 20 December 2022 Saurabh talk contribs created page Rocky 8.x gitlab install on a new machine (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control > gitlab > gitlab install on a new machine To install gitlab on a Rocky 8.x machine use: # Ensure proper DNS based resolution for desired FQDN. #: Installing gitlab using IP address will not work # Configure the desired FQDN to resolve to LAN IP via /etc/hos...")
- 04:45, 20 December 2022 Saurabh talk contribs created page Rocky 8.x gitlab (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control > gitlab *Rocky 8.x gitlab install on a new machine '''There are older articles on this at:''' *CentOS 7.x gitlab *Gitlab Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control > Rocky 8.x gitlab|...")
- 04:45, 20 December 2022 Saurabh talk contribs created page Rocky 8.x Version Control (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control *Rocky 8.x gitlab Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps > Version Control")
- 04:45, 20 December 2022 Saurabh talk contribs created page Rocky 8.x DevOps (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps *Rocky 8.x Version Control Home > Rocky Linux or CentOS > Rocky Linux 8.x > DevOps")
- 04:54, 14 December 2022 Saurabh talk contribs created page Solving VMs stuck on poweron or poweroff or reboot non-cancel able operations (Created page with "Home > VMWare platform > VMWare vSphere or ESXi > Solving VMs stuck on poweron or poweroff or reboot non-cancel able operations Sometimes a VM may get stuck in a operation such as power-on / power-off / reboot which cannot be cancelled. If VM is stuck in this state for fairly long time (eg more than 15 minutes) it is safe to assume that the operation is not going to succeed. In such cases we can kill the process using: # Find the ESXi host wh...")
- 07:32, 10 December 2022 Saurabh talk contribs created page Rocky 8.x RustDesk (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Remote Access > RustDesk =RustDesk Server installation= Install RustDesk on Rocky 8.x using: # Create an instance with public IP. # Map DNS to public IP (IPv4 / IPv6 or both) # Based on preference: #* Set hostname #* Configure history retention #* Add swap #* Configure postfix and logwatch # Install wget #:<pre> #:: dnf -y install wget #:</pre> # D...")
- 07:16, 10 December 2022 Saurabh talk contribs created page Rocky 8.x Remote Access (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > Remote Access *Rocky 8.x RustDesk '''There are older articles on this at CentOS 8.x remote access''' Home > Rocky Linux or CentOS > Rocky Linux 8.x > Remote Access")
- 07:01, 10 December 2022 Saurabh talk contribs created page Figuring out where space is utilized in google account (Created page with "Home > Internet tips and tricks > Figuring out where space is utilized in google account We can open https://drive.google.com/ and see total / used space of individual google account. In case of organization account with fixed total pooled storage, we can only see used space and not total space of organization. If we are running out of space on an old account and want to know where the space is going (Gmail, Google Photos, Google drive, etc.) the...")
- 06:48, 10 December 2022 Saurabh talk contribs created page Rocky 8.x SSH client Connecting to old network devices with legacy protocols and ciphers (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration > SSH client > Connecting to old network devices with legacy protocols and ciphers If while connecting to a network device (eg TP-Link AP or switch) you get errors similar to '''one among''' below: <pre> Unable to negotiate wit...")
- 06:46, 10 December 2022 Saurabh talk contribs created page Rocky 8.x SSH client (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration > SSH client *Rocky 8.x SSH client Connecting to old network devices with legacy protocols and ciphers '''There are older articles on this at: CentOS 8.x SSH client'''")
- 06:45, 10 December 2022 Saurabh talk contribs created page Rocky 8.x System Administration (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x > System Administration *Rocky 8.x SSH client")
- 06:45, 10 December 2022 Saurabh talk contribs created page Rocky Linux 8.x (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 8.x *Rocky 8.x System Administration")
- 07:55, 15 October 2022 Saurabh talk contribs created page Convert date to different format using date command (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Convert date to different format using date command '''Older article on this is at Date''' =Convert date in human-readable format to seconds since epoch (1 Jan 1970)= May databases and log files may output timestamp in seconds since 1 Jan 1970 instead of using human-readable format. In such cases convert date to...")
- 07:42, 15 October 2022 Saurabh talk contribs created page Rocky 9.x Database servers (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers *Rocky 9.0 Mariadb server Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers")
- 07:42, 15 October 2022 Saurabh talk contribs created page Rocky 9.0 Mariadb server (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers > Mariadb *Rocky 9.0 Mariadb Save SQL query output to a file Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers > Mariadb")
- 07:41, 15 October 2022 Saurabh talk contribs created page Rocky 9.0 Mariadb Save SQL query output to a file (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Database servers > Mariadb > Save SQL query output to a file To save SQL query output to a file append the SQL query with: <pre> INTO OUTFILE '/tmp/output1.txt'; </pre> '''Note that above file may not be visible in /tmp. You may have to go to /tmp/systemd-private-<uid>-mariadb.service...")
- 06:20, 15 October 2022 Saurabh talk contribs created page Reset root password on vCenter 7.x (Created page with "Home > VMWare platform > VMWare vCenter > Reset root password on vCenter 7.x To reset forgotten root password for vCenter 7.x use: # If "administrator@vsphere.local" login is working and only root passwords needs to be reset then we can get vCenter VM console from vCenter itself. ## If administrator@vsphere.local password is also not known then Login into ESXi host where vCenter VM is present. ##: If there are multiple hosts we need to login in...")
- 05:43, 15 October 2022 Saurabh talk contribs created page Rocky 9.x Increase default PHP resources (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Web Servers > Increase default PHP resources Compared to default '<tt>/etc/php.ini</tt>' values use: <pre> max_execution_time = 600 max_input_time = 1200 memory_limit = 2560M post_max_size = 160M upload_max_filesize = 400M max_file_uploads = 400 max_input_vars = 10000 date.timezone = 'Asia/Kolkata' </pre> Further,...")
- 05:38, 15 October 2022 Saurabh talk contribs created page Rocky 9.x Configure apache web server for concurrency (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Web Servers > Apache > Configure for concurrency Concurrency is handled via mpm module. There are different types of mpm modules out of which only one can be used at a time. We can see currently enabled mpm module via: <pre> httpd -V | grep -i mpm </pre> We can see whic...")
- 05:31, 15 October 2022 Saurabh talk contribs created page Rocky 9.x Desktop tools and applications (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications *chown command Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications")
- 05:31, 15 October 2022 Saurabh talk contribs created page Chown command (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Desktop tools and applications > Chown command =Change ownership of symbolic links= Normally chown changes ownership of file / directory pointed by symbolic link. To change ownership of symbolic link itself we need to use '<tt>-h</tt>' option. For example <pre> chown -h <user>:<group> <symbolic-link-name.txt> </pre> Refer: * https://unix.stackexch...")
- 08:46, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Owncloud upgrade by migrating to a new VM with updated version (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud > Upgrade and Migrate To upgrade owncloud along with migrating to a new VM (Typically cloud or at least public) use: # Stop web server on old server. For example #:<pre> #:: /opt/owncloud-<ver>/ctlscript.sh stop apache #:</pre> # Take one full backup...")
- 06:47, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Owncloud delete files via REST API via command line (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud > Delete files via REST API via command line If there is need to delete file from CLI instead of using Web login / Desktop client then use: <pre> curl -u <owncloud-username>:<owncloud-password> -X DELETE https://<owncloud-fqdn-or-ip>/owncloud/remote.php/webdav/<p...")
- 06:44, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Owncloud Manually moving DataDirectory (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud > Manually moving DataDirectory We can change path of owncloud DataDirectory as follows: ('''Assuming moving from''' /var/www/owncloud '''to''' /mnt/owncloud ) # Enable maintenance mode. For example #:<pre> #:: cd /var/www/html/owncloud #:: sudo -u apache php -f occ mainten...")
- 06:31, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Owncloud (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing > Owncloud *Rocky 9.x Owncloud Manually moving DataDirectory *Rocky 9.x Owncloud delete files via REST API via command line *Rocky 9.x Owncloud upgrade by migrating to a new VM with updated version '''There are older articles at:''' *CentOS 8.x Owncloud *CentOS 7.x owncloud Home > Rocky Linux or Cen...")
- 06:30, 7 October 2022 Saurabh talk contribs created page Rocky 9.x File sharing (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing *Rocky 9.x Owncloud Home > Rocky Linux or CentOS > Rocky Linux 9.x > File Sharing")
- 06:20, 7 October 2022 Saurabh talk contribs created page Rocky 9.x Web servers (Created page with "Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Web servers *Rocky 9.x Apache web server configuration Home > Rocky Linux or CentOS > Rocky Linux 9.x > Rocky 9.x Web servers")
- 06:13, 7 October 2022 Saurabh talk contribs created page Ls command (Created page with "Home > Shell scripting > ls command =Get full time along with year information in ls -l output= Normally '<tt>ls -l</tt>' output only prints date (day) and month and not year information of file last modification, access or change time. If the file is modified today itself it prints hour:minute information. To list year, seconds, Microseconds also use: <pre> ls -l --full-time </pre> Refer: * https://stackoverflow.com/questions/13999300/bash-ls-...")
