Rahul Sahu To create a RAID 10 (Striped Mirror Vdev ZPool) on Ubuntu Linux, you can use the zpool command line utility. Here’s the step-by-step process: Identify available disks: Before you create the RAID 10 array, you need to identify the available disks. You can use the lsblk command to list all the available block devices on … Read more
The “Too many open files” error can occur in PHP-fpm when the system limit for open file descriptors is reached. To resolve this issue, you can increase the limit for open file descriptors in the system. Here’s how to increase the open file descriptor limit in PHP-fpm: Find the current open file descriptor limit: You … Read more
To configure pfSense as a dual WAN load balancing and failover router, you need to have two WAN connections and a pfSense firewall installed. Here are the steps to configure pfSense as a dual WAN load balancing and failover router: Login to the pfSense web interface and go to “System” -> “Routing.” In the “Gateway … Read more
Debian provides security patches and updates for its systems through its package management system, “apt.” To apply security patches and updates on a Debian system, you can follow these steps: Update the package list: Before you can install any updates, you need to have the latest package list. Run the following command to update the … Read more
To see the CPU temperature on CentOS 7 / Red Hat Enterprise Linux 7, you can use the “lm_sensors” package. This package provides tools to monitor the temperature of various system components, including the CPU. To install the “lm_sensors” package, run the following command: # yum install lm_sensors Once the package is installed, you can … Read more
To see information about PCI devices on CentOS 7 / Red Hat Enterprise Linux 7.x / 8.x, you can use the “lspci” command. The “lspci” command is a part of the “pciutils” package and can be installed by running the following command: # yum install pciutils Once the package is installed, you can run the … Read more
To configure a static IP address on CentOS 7 / RHEL 7, follow these steps: Open the network configuration file: Open the file “/etc/sysconfig/network-scripts/ifcfg-eth0” using a text editor. The “eth0” in the file name refers to the name of the network interface you want to configure. If you have multiple network interfaces, you will have … Read more
You can use the “dd” command to create a disk image on Linux or Unix systems. Here are the steps to create a disk image: Identify the source disk: You can use the “lsblk” or “fdisk -l” command to identify the source disk and partition you want to create the image of. For example, if … Read more
To configure a Wi-Fi and LAN bridged access point in pfSense firewall router, you need to perform the following steps: Connect to the pfSense web interface. Go to Interfaces > (assign) > Bridges and add a new bridge. Give the bridge a descriptive name, such as “WiFiLANBridge”. Select the Wi-Fi and LAN interfaces you want … Read more
To create a “cron.log” file to log crontab logs on Ubuntu 16.04, 18.04, and 20.04, you can use the following steps: Create the “cron.log” file: # touch /var/log/cron.log Change the ownership of the file to the syslog user: # chown syslog:adm /var/log/cron.log Edit the syslog configuration file: # nano /etc/rsyslog.d/50-default.conf Add the following line to … Read more