Tags: SysAdmin

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square brackets
We continue our tour of square brackets in Bash with a look at how they can act as a command.

Using Square Brackets in Bash: Part 2

Welcome back to our mini-series on square brackets. In the previous article, we looked at various ways square brackets are used at the command line, including globbing. If you've not read that article, you might want to start there. Square brackets can also be used as a command. Yep, for example,...
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LDAP
Learn how to install and use the LDAP Account Manager (LAM) tool in this tutorial from Jack Wallen.

How to Install LDAP Account Manager on Ubuntu Server 18.04

Welcome back to this three-party journey to getting OpenLDAP up and running so that you can authenticate your Linux desktop machines to the LDAP server. In part one, we installed OpenLDAP on Ubuntu Server 18.04 and added our first LDAP entries to the directory tree via the Command Line Interface (...
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SREs Wish Automation Solved All Their Problems

Although the SRE job role is often defined as being about automation, the reality is that 59 percent of SREs agree there is too much toil (defined as manual, repetitive, tactical work that scales linearly) in their organization. Based on 188 survey responses from people holding SRE job roles,...
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How to Install NTP Server and Client(s) on Ubuntu 18.04 LTS

NTP or Network Time Protocol is a protocol that is used to synchronize all system clocks in a network to use the same time. When we use the term NTP, we are referring to the protocol itself and also the client and server programs running on the networked computers. NTP belongs to the traditional...
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An Introduction to Linux Virtual Interfaces: Tunnels

Linux has supported many kinds of tunnels, but new users may be confused by their differences and unsure which one is best suited for a given use case. In this article, I will give a brief introduction for commonly used tunnel interfaces in the Linux kernel. There is no code analysis, only a brief...
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square brackets
This tutorial tackle square brackets and how they are used in different contexts at the command line.

Using Square Brackets in Bash: Part 1

After taking a look at how curly braces ({}) work on the command line, now it’s time to tackle brackets ([]) and see how they are used in different contexts. Globbing The first and easiest use of square brackets is in globbing. You have probably used globbing before without knowing it. Think of all...
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Move your Dotfiles to Version Control

There is something truly exciting about customizing your operating system through the collection of hidden files we call dotfiles. In What a Shell Dotfile Can Do For You, H. "Waldo" Grunenwald goes into excellent detail about the why and how of setting up your dotfiles. Let's dig into the why and...
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How to Monitor Disk IO in Linux

iostat is used to get the input/output statistics for storage devices and partitions. iostat is a part of the sysstat package. With iostat, you can monitor the read/write speeds of your storage devices (such as hard disk drives, SSDs) and partitions (disk partitions). In this article, I am going to...
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OpenLDAP
In part one of this short tutorial series, Jack Wallen explains how to install OpenLDAP.

How to Install OpenLDAP on Ubuntu Server 18.04

The Lightweight Directory Access Protocol (LDAP) allows for the querying and modification of an X.500-based directory service. In other words, LDAP is used over a Local Area Network (LAN) to manage and access a distributed directory service. LDAPs primary purpose is to provide a set of records in a...
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A Musical Tour of Hints and Tools for Debugging Host Networks

Shannon Nelson from the Oracle Linux Kernel Development team offers these tips and tricks to help make host network diagnostics easier. He also includes a recommended playlist for accompanying your debugging! Ain't Misbehavin' (Dinah Washington) As with many debugging situations, digging into and...
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