How To Disable IPv6 In CentOS 7

Method 1 Edit file /etc/sysctl.conf, vi /etc/sysctl.conf Add the following lines: net.ipv6.conf.all.disable_ipv6 = 1 net.ipv6.conf.default.disable_ipv6 = 1 If you want to disable IPV6 for particular network card, for example enp0s3, add the following entry. net.ipv6.conf.enp0s3.disable_ipv6 = 1 Save and exit the file. Execute the following command to reflect the changes. sysctl -p Method 2: To IPv6 disable… Continue reading How To Disable IPv6 In CentOS 7

Install PHP 7.2 on CentOS, RHEL

  Repositories configuration: On Fedora, standards repositories are enough, on Enterprise Linux (RHEL, CentOS) the Extra Packages for Enterprise Linux (EPEL) repository must be configured, and on RHEL the optional channel must be enabled. Fedora 27 wget http://rpms.remirepo.net/fedora/remi-release-27.rpm dnf install remi-release-27.rpm Fedora 26 wget http://rpms.remirepo.net/fedora/remi-release-26.rpm dnf install remi-release-26.rpm RHEL version 7.4 wget https://dl.fedoraproject.org/pub/epel/epel-release-latest-7.noarch.rpm wget http://rpms.remirepo.net/enterprise/remi-release-7.rpm… Continue reading Install PHP 7.2 on CentOS, RHEL

Linux Install and Configure NTP to Synchronize The System Clock

How do I install and configure NTP under CentOS Linux version 5.x or 6.x server to synchronize the system clock? You can easily install NTP (Network Time Protocol, a means of transmitting time signals over a computer network) using the yum command under Red Hat or CentOS/Fedora Linux server or workstation based systems. You need to install… Continue reading Linux Install and Configure NTP to Synchronize The System Clock

Install SNMP Service/Daemon on CentOS

In this guide I’ll be explaining how to install the SNMP service on CentOS. The SNMP service is available in the standard CentOS repository. 1. Install net-snmp with yum: yum install net-snmp  2. Create a simple SNMP configuration: mv /etc/snmp/snmpd.conf /etc/snmp/snmpd.conf.org vim /etc/snmp/snmpd.conf Add the following to /etc/snmp/snmpd.conf ; Replace 1.2.3.4 with the IP address… Continue reading Install SNMP Service/Daemon on CentOS

CentOS Remove Old Kernels

Tonight when upgrading a CentOS Linux server it was noted by YUM that 15MB more disk space was needed to upgrade grub and the kernel itself. Below are four quick steps to verify what kernels are installed, install yum-utils if it is not installed already, delete previous kernels and set YUM to remove old kernels… Continue reading CentOS Remove Old Kernels