How to Install Graylog Sidecar

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What is Graylog Sidecar?

Graylog Sidecar is a nimble configuration management framework for various log collectors called backends. The Graylog master node acts as a centrally located hub that contains the configurations of the log collectors. Sidecar can run as a service on both Windows and Linux servers.

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How to Install and Configuring NTP on CentOS and Ubuntu

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Introduction

In this article we will learn what the Network Time protocol (NTP) is and how to install it on the two Linux distributions most commonly used on Liquid Web’s servers. We will be focusing on using CentOS 7 and Ubuntu 18.04 servers, but the process is largely the same on other recent versions of each. Before we start, make sure we are familiar with using SSH (Secure Shell) as we’ll need it to connect to the server. Here’s a link to one of our articles on the basics of SSH if you are unfamiliar with its usage.

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Install Fail2Ban On CentOS 7

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What Is Fail2Ban?

Fail2ban is an open-source software that actively scans the servers log files in real-time for any brute force login attempts, and if found, summarily blocks the attack using the servers firewall software (firewalld or iptables). Fail2Ban runs as a background process and continuously scans the log files for unusual login patterns and security breach attempts.

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Understanding the Apache Service Status

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In this article, we will be reviewing the Apache Service Status. Sometimes checking the performance of a server can be difficult. Apache has built-in utilities that assist in monitoring the usage and performance of Apache. Apache Status also provides information that aids in performance auditing and control tuning.

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How to Start and Enable Firewalld on CentOS 7

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In this article, we discuss how to start and enable firewalld. It is highly recommended that you have a firewall protecting your server.
Pre-Flight Check
  • These instructions are intended specifically for enabling and starting Firewalld CentOS 7.
  • I’ll be working from a Liquid Web Self Managed CentOS 7 server, and I’ll be logged in as root.

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An Introduction to Managing a Linux Server with systemd

Reading Time: 2 minutesSystemd is is an init system used by several common Linux Distributions which has gained popularity since 2015. A Linux init system is the first process or daemon started on a system after the initial boot process, and manages services, daemons, and other system processes. Systemd is comprised of unit files that contain the initialization instructions for the daemons which it controls. While many portions of a system can be managed with systemd, this article will focus on managing services. Continue reading “An Introduction to Managing a Linux Server with systemd”

How to Install and Configure vsftpd on CentOS 7

Reading Time: 2 minutesFTP (File Transfer Protocol) is one of the most popular methods to upload files to a server. There exist a wide array of FTP servers, such as vsftpd, you can use and FTP clients exist for every platform.

Essentially no matter what OS you use you can find an easy to use FTP client, so it makes for a great solution to transfer files. On CentOS based servers before you can connect via FTP you’ll have to setup an FTP server. Here we’re gonna setup vsftpd which is a great option since it has a focus on security and speed.

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Change a Password for PostgreSQL on Linux via Command Line

Reading Time: < 1 minutePostgreSQL supports many client authentication methods, but in this case we’re only going to concern ourselves with two: password and md5.

Note: The default authentication method for PostgreSQL is ident. If you’d like to change the PostgreSQL authentication method from ident to md5, then visit the linked tutorial!

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Change PostgreSQL Authentication Method from Ident to MD5

Reading Time: 2 minutesPostgreSQL supports multiple client authentication methods including: trust, reject, md5, password, gss, sspi, krb5, ident, peer, ldap, radius, cert, and pam. Here we’re only going to concern ourselves with two: ident and md5.

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What is the Default Password for PostgreSQL?

Reading Time: < 1 minuteWhen connecting to PostgreSQL on Linux for the first time many admins have questions, especially if those admins are from the MySQL world. By default, when PostgreSQL is installed, a postgres user is also added.

If you run the command:

cat /etc/passwd

… you’ll see the postgres user.

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