How to Install and Setup 389 Directory Server on CentOS 7

389 Directory Server (previously Fedora Directory Server) is an open source enterprise class LDAP server for Linux. It is developed by Red Hat community-supported Fedora Project. The name 389 is derived from the port number for LDAP. In this article we will guide you through the steps on how to install and setup 389 directory […]

How to Change default runlevel in CentOS 7 / RHEL 7

In CentOS 7 and RHEL 7, the systemd process replaces the init process for starting services at boot time and also for changing the runlevels. It uses “targets” instead of run-levels and relies on systemctl command to change runlevel or to change the target. The systemd provides much more control than the init process does […]

Microsoft Will Bring Its SQL Database Software to Linux

Nearly one quarter of all the servers running in Microsoft’s Azure cloud service are powered by the open source operating system Linux. But you can’t actually run much Microsoft software on those Linux servers. That’s about to change. Companies will soon be able to run Microsoft’s database software SQL Server on Linux, Microsoft’s Scott Guthrie […]

How to Disable IPv6 on Redhat / CentOS 6 / CentOS 7

This howto will show you how to disable ipv6 on RHEL 6/7, CentOS 6 and CentOS7. IPv6 is enabled by default. In this article I summarize 3 configuration which needs to be changed to completely disable ipv6. Check the configuration of the existing network with the “ifconfig” command. If inet6 appears in the configuration, means […]

How to Install and Setup Munin on CentOS 7

Munin is open source and free software for monitoring computer system, network monitoring and application infrastructure monitoring software. Munin offers monitoring and alerting for servers, switches, applications, and services. Munin can help system administrators to analyze the trend of the computer system whether it is experiencing problems or not. It can be an easier alternative […]

Linux Machines Can Be Hacked by Pressing Backspace 28 Times

A Pair of Spanish cybersecurity researchers have discovered a Linux vulnerability that could allow anyone with physical access to a system to log in without a password and launch a variety of attacks. The vulnerability, found in versions of the commonly used Grub2 (GNU Grand Unified Bootloader) bootloader released since 2009, can be exploited by […]

How to Remove Banned IP from Fail2ban on CentOS 6 / CentOS 7

Fail2ban is an intrusion prevention software framework that able to protect your server from brute-force attacks. Fail2ban written in the Python programming language and is widely used by most of the VPS servers. Fail2ban will scan log files and IP blacklists that shows signs of malicious, too many password failures, web server exploitation, WordPress plugin […]

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