News Category: System Administration

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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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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The Lost Worlds of Telnet

Most people think of Telnet as “that thing I used to use to remotely access servers.” But a few hearty souls are still keeping their Telnet services online — and it’s a great way to experience some good old-fashioned time-wasting fun! Although, as a work tool, Telnet has long been deprecated in...
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Kubernetes Warms Up to IPv6

There’s a finite number of public IPv4 addresses and the IPv6 address space was specified to solve this problem some 20 years ago, long before Kubernetes was conceived of. But because it was originally developed inside Google and it’s only relatively recently that cloud services like Google and AWS...
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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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The Hard Part in Becoming a Command Line Wizard

I’ve long been impressed by shell one-liners. They seem like magical incantations. Pipe a few terse commands together, et voilà! Out pops the solution to a problem that would seem to require pages of code. Are these one-liners real or mythology? To some extent, they’re both. Below I’ll give a...
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Getting Started with the cat Command

The Linux cat and zcat commands are more useful than you may realize. Cat is a fairly simple tool designed to concatenate and write file(s) to your screen, which is known as standard output (stdout). It is part of the GNU Core Utils released under the GPLv3+ license. You can expect to find it in...
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Performance Monitoring with OpenTracing, OpenCensus, and OpenMetrics

If you are familiar with instrumenting applications, you may have heard of OpenMetrics, OpenTracing, and OpenCensus. These projects aim to create standards for application performance monitoring and collecting metric data. Although the projects do overlap in terms of their goals, they each take a...
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Learn to Use curl Command with Examples

Curl command is used to transfer files to and from a server, it supports a number of protocols like HTTP, HTTPS, FTP, FTPS, IMAP, IMAPS, DICT, FILE, GOPHER, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMB, SMBS, SMTP, SMTPS, TELNET and TFTP etc. Curl also supports a lot of features like proxy...
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9 Trends to Watch in Systems Engineering and Operations

If your job or business relies on systems engineering and operations, be sure to keep an eye on the following trends in the months ahead. AIOps Artificial intelligence for IT operations (AIOps) will allow for improved software delivery pipelines in 2019. This practice incorporates machine learning...
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