Tags: SysAdmin

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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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Printing from the Linux Command Line

Printing from the Linux command line is easy. You use the lp command to request a print, and lpq to see what print jobs are in the queue, but things get a little more complicated when you want to print double-sided or use portrait mode. And there are lots of other things you might want to do — such...
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How to Set the PATH Variable in Linux

In Linux, your PATH is a list of directories that the shell will look in for executable files when you issue a command without a path. The PATH variable is usually populated with some default directories, but you can set the PATH variable to anything you like. When a command name is specified by...
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A Linux Sysadmin’s Guide to Network Management, Troubleshooting and Debugging

A system administrator’s routine tasks include configuring, maintaining, troubleshooting, and managing servers and networks within data centers. There are numerous tools and utilities in Linux designed for administrative purposes. In this article, we will review some of the most used command-line...
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mlocate
In this series of articles, we’ll look at the mlocate tool and examine how to quickly and easily tune it to your own specifications.

Finding Files with mlocate

Learn how to locate files in this tutorial from our archives. It’s not uncommon for a sysadmin to have to find needles buried deep inside haystacks. On a busy machine, there can be hundreds of thousands of files present on your filesystems. What do you do when you need to make sure one particular...
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Arpit Joshipura
The standard registration price for Open Networking Summit ends March 17, so hurry and register today! Also be sure to check out the Day Passes and Hall Passes available.

ONS Evolution: Cloud, Edge, and Technical Content for Carriers and Enterprise

The first Open Networking Summit was held in October 2011 at Stanford University and described as “a premier event about OpenFlow and Software-Defined Networking (SDN)”. Here we are seven and half years later and I’m constantly amazed at both how far we’ve come since then, and at how quickly a...
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Tutorial: Tap the Hidden Power of Your Bash Command History

Last month I wrote about combining a series of Unix commands using pipes. But there are times where you don’t even need pipes to turn a carefully-chosen series of commands into a powerful and convenient home-grown utility. ... The echo command repeats whatever text is entered after it, for example...
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Curly braces
We continue our tour of Bash basics with a closer look at curly braces and how and when to use them.

All about {Curly Braces} in Bash

At this stage of our Bash basics series, it would be hard not to see some crossover between topics. For example, you have already seen a lot of brackets in the examples we have shown over the past several weeks, but the focus has been elsewhere. For the next phase of the series, we’ll take a closer...
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Linux Security: Cmd Provides Visibility, Control Over User Activity

There's a new Linux security tool you should be aware of — Cmd (pronounced "see em dee") dramatically modifies the kind of control that can be exercised over Linux users. It reaches way beyond the traditional configuration of user privileges and takes an active role in monitoring and controlling...
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