How to Install and Configuring NTP on CentOS and Ubuntu

Posted on March 16, 2020 by Joseph Molloy | Updated: March 24, 2020
Category: Tutorials | Tags: CentOS, CentOS 7, Chrony, Coordinated Universal Time, cPanel, Daemon, Firewall, firewalld, Nano, Network Time Protocol, NTP, Plesk, Port, SSH, Systemctl, Systemd-Timesyncd, Time, Timedatectl, Timezone, Ubuntu, Ubuntu 18.04, UDP, UTC, Vim, Yum

Reading Time: 8 minutes

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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How to Install Keras

Posted on March 13, 2020 by Danny Jensen | Updated: March 24, 2020
Category: Tutorials | Tags: API, CentOS, CentOS 7, Clone, CNTK, Data Science, Data Structure, Deep Learning, Framework, Git Clone, GitHub, Keras, Machine Learning, Machine Learning Models, Model, Neural network, Python, Python-PIP, SCL, Setuptools, Tensorflow, tensorflow platform, Theano, Yum, Yum-Utils

Reading Time: 6 minutes

Keras is a Python-based high-level neural networks API that is capable of running on top TensorFlow, CNTK, or Theano frameworks used for machine learning. It can be said that Keras acts as the Python Deep Learning Library. Keras was created with emphasis on being user-friendly since the main principle behind it is “designed for human beings, not machines.” The core data structure of Keras is a model, or a way to organize layers.

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Creating and Deleting a PostgreSQL Database on Ubuntu 16.04

Posted on March 12, 2020 by Justin Palmer
Category: Series, Tutorials | Tags: Add, create, Database, deleting, PostgreSQL, remove

Reading Time: < 1 minute

PostgreSQL (pronounced “post-gress-Q-L”) is a household name for open source relational database management systems.

Its object-relational meaning that you’ll be able to use objects, classes in database schemas and the query language. In this tutorial, we will be demonstrating some essentials like creating, listing and deleting a database.

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How To Modify A cPanel License in Manage

Posted on March 11, 2020 by Mike Shooltz
Category: Common Fixes, Tutorials | Tags: Account Management, Accounts, Change License, cPanel, cPanel License, cPanel License Tier, Cpkeyclt, License, Manage, Manage Dashboard, Manage.liquidweb.com, Pro 30, Terminate, Updating cPanel License, Users, WHM

Reading Time: 2 minutes

Have you run into the cPanel error seen below in WHM where it prevents you from adding more cPanel accounts? It states that you have exceeded the total number of accounts allowed by your license. If so, this tutorial will demonstrate how you can increase the quantity of available accounts from within your Manage interface.

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How Do I Set Up Setuid, Setgid, and Sticky Bits on Linux?

Posted on March 10, 2020 by Matt Holtz | Updated: March 24, 2020
Category: Tutorials | Tags: Chgrp, Chmod, chown, Execute, File Permissions, Group, Notation, Permission, Permissions, Read, Setgid, Setuid, Special Permissions, Sticky, Sticky Bit, Sticky Bits, User, Write

Reading Time: 6 minutes

What Are Linux File Permissions?

Setuid, Setgid and Sticky Bits are special types of Unix/Linux file permission sets that permit certain users to run specific programs with elevated privileges. Ultimately the permissions that are set on a file determine what users can read, write or execute the file. Linux provides more advanced file permissions that allow you to do more specific things with a file, or directory. Typically, these file permissions are used to allow a user to do certain tasks with elevated privileges (allow them to do things they normally are not permitted to do). This is accomplished with three distinct permission settings. They are setuid, setgid, and the sticky bit.

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Changes To CSF Country Blocking

Posted on March 6, 2020 by Dayne Larsen
Category: Technical Support, Tutorials | Tags: CCPA, CC_ALLOW, CC_DENY, ConfigServer, ConfigServer Firewall, CSF, CSF Configuration, Deny Country, Firewall, GeoLite2, MaxMind, MaxMind License Key, MM_License_Key

Reading Time: 5 minutes

Issue

Have you seen this error when restarting csf?

*ERROR*: Country Code Lookups setting MM_LICENSE_KEY must be set in 
 /etc/csf/csf.conf to continue using the MaxMind databases

Recently MaxMind, the company that provides the IP lookup database based on country of origin for CSF, has decided to require a free license to be able to access that database now. They had to do this, so they can conform to the new state law in California for the CCPA act as noted here.

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How To Install and Configure Wraith

Posted on March 6, 2020 by Ellen Sletton
Category: Tutorials | Tags: CasperJS, Chrome, Convert, Crawl, Fuzz, Gem, GitHub, ImageMagick, PhantomJS, Regression Testing, Ruby, Screenshots, Selenium, SlimerJS, Vim, Visual Regression Testing, Visual Testing, WebDriver, Wraith, Yaml

Reading Time: 10 minutes

What is Wraith?

Wraith is a visual regression testing tool which uses screenshot comparisons to assess visual differences in a website over time. It is currently hosted on GitHub and available under an Apache 2.0 open-source license.

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Show (List) MySQL Databases on Linux via Command Line

Posted on March 5, 2020 by Justin Palmer
Category: Technical Support, Tutorials | Tags: CLI, Command-line, Database, Linux, MariaDB, MySQL

Reading Time: < 1 minute

Pre-Flight Check

These instructions are intended for showing (listing) all MySQL databases via the command line.
I’ll be working from a Liquid Web Core Managed CentOS 7 server, and I’ll be logged in as root.

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How to Install Ruby on Rails on CentOS 8

Posted on March 5, 2020 by Ellen Sletton
Category: Tutorials | Tags: Application development, CentOS, Curl, DNF, Framework, Gem, Gems, GnuPG, GnuPG2, Package Management, Package Manager, Programming, Rails, Ruby, Ruby Gems, Ruby-on-Rails, RVM, Source, UserMod

Reading Time: 8 minutes

Today we’re going to install Ruby on Rails using RVM (the Ruby Version Manager) onto a CentOS 8 server. Let’s start by defining a few terms and definitions we will be using during the process.

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Why Did My Server Block My IP?

Posted on March 4, 2020 by David Singer
Category: Common Fixes, Getting Started, Technical Support, Tutorials | Tags: Access, Attack, Block, Brute Force, Command-line, Connection, Connection Issues, CSF, Email, Failed Login, FTP, IP, IP Address, Linux Commands, Mac, Malware, Monitoring, Network Utility, PowerShell, Remote Access, SFTP, SMTP, Spam, Status, Unblock, Unblock IP, Windows, Windows Command, Windows Command Processor

Reading Time: 5 minutes

In this article, we will discuss how and why a server might block an IP address and how to resolve it.

When your company hosts a website or web app online, whether it’s an individual dedicated server or a whole server cluster, you naturally expect to have uninterrupted access at all times. However, it’s possible that in rare circumstances, your server could accidentally block your IP and prevent you from connecting and using the service.

If that has happened to you, this quick summary will provide you with all the essential information needed to verify the status of your IP. Additionally, we will offer some of the most common reasons for being blocked, as well as a few suggestions on how to unblock and whitelist your IP as quickly as possible.

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Introduction

What Are Linux File Permissions?

Issue

What is Wraith?

Pre-Flight Check

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