Set Time Zone on CentOS 7 Rumi, January 14, 2020 Checking the Current Timezone In CentOS and other modern Linux distros, you can use the timedatectl command to display and set the current system’s time and timezone. timedatectl The output below shows that the system’s timezone is set to UTC: Local time: Wed 2019-02-06 22:43:42 UTC Universal time: Wed 2019-02-06… Continue Reading
Reinstall VirtualBox on Ubuntu & CentOS Rumi, January 8, 2020 For Ubuntu To remove virtualbox sudo dpkg –list virtualbox-* sudo apt autoremove –purge virtualbox* dpkg -l virtualbox* | grep ^i Remove all PPAs from sources.list and source.list.d directory mkdir ~/apt-tmp sudo mv /etc/apt/sources.list.d/* ~/apt-tmp Make sure there is nothing except official repositories sources in /etc/sources.list. And update your sources: sudo apt… Continue Reading
Install ZFS on CentOS 7 Rumi, January 1, 2020 Installing ZFS File System ZFS File System support is not enabled by default on CentOS 7. That is not the only problem. ZFS is not available in the official package repository of CentOS 7. You have to install it from the official package repository of ZFS. I am installing this… Continue Reading
Disable FirewallD and Enable Iptables on CentOS 7 Rumi, December 28, 2019 Download and Install the Iptables Service To begin your server’s transition, you need to download and install the iptables-service package from the CentOS repositories. Download and install the service files by typing: sudo yum install iptables-services This will download and install the systemd scripts used to manage the iptables service…. Continue Reading
Endian Installation USB Flash Drive Rumi, December 25, 2019 This lesson describes how to create an installation USB drive for image files provided by Endian and to verify the integrity of the image file. The procedure applies to Windows users with XP, Vista, or Windows7 systems. Requirements You need the following to complete this lesson: .iso or .img image of an Endian… Continue Reading
Install Qemu Guest Agent on Proxmox Rumi, December 21, 2019 The qemu-guest-agent is a helper daemon, which is installed in the guest. It is used to exchange information between the host and guest, and to execute command in the guest. In Proxmox VE, the qemu-guest-agent is used for mainly two things: To properly shutdown the guest, instead of relying on… Continue Reading
Install Observium CentOS 7/Ubuntu 16.04/ Debian 9 Rumi, December 20, 2019December 20, 2019 Observium is an open source, low-maintenance, auto-discovering network monitoring tool for operating systems and network hardware. It supports Linux and Windows operating systems and network hardware like Cisco, Juniper, Brocade, Foundry, HP. Observium is based on AMP (Apache, MySQL, and PHP) stack and it collects the monitoring metrics via SNMP protocol. It uses RRDtool to make a graph of metrics… Continue Reading
Zimbra 8.8 on CentOS 7 Rumi, December 17, 2019 Before we proceed with Zimbra Collaboration Suite installation process, first login to your server console with root privileges and install the following packages: # yum -y install unzip net-tools sysstat openssh-clients perl-core libaio nmap-ncat libstdc++.so.6 perl perl-core ntpl nmap sudo libidn gmp libaio libstdc++ unzip sqlite dnsmasq Next, issue getenforce command to check… Continue Reading
Add a New Disk Larger Than 2TB to An Existing Linux Rumi, December 13, 2019December 11, 2020 I am using fdisk and parted utilities to do this configuration. First list the current partition details using fdisk command as shown. # fdisk -l List Linux Partition Table For the purpose of this article, I am attaching a hard disk of 20GB capacity, which can be followed for disk larger than 2TB as well. Once… Continue Reading
Install PHP 7.2 on Debian 9 Rumi, December 8, 2019 Before you start with the installation of PHP 7.2 on your Debian VPS, make sure that you have full root access to it. Connect to the server via SSH and upgrade all the system software to the latest version available. You can do this by running the following commands in… Continue Reading