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Here Today, Gone When You Exit: Proper Tempfiles in Shell Scripts

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raindog308
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Apr 09, 2022
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In the course of my career, I've periodically come across code like this in shell scripts: TEMP_FILE=/tmp/tempfile Or sometimes, slightly more elegantly: TEMPFILE=/tmp/tempfile.$$ The problems with the first example are obvious, especially if it appears in many different scripts.  The second is better.  The "$$" means "my process ID", who if whatever script had a process ID of 5309, the TEMPFILE variable would be set to /...

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Here Today, Gone When You Exit: Proper Tempfiles in Shell Scripts

The Wrong Way to Use Let’s Encrypt on a Private Network

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raindog308
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Apr 04, 2022
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I've been working on a small app written in golang, and I'd like my local-area network connections to the golang-embedded webserver to be over https.  Most of the clients are going to be scripts runni...

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The Wrong Way to Use Let’s Encrypt on a Private Network

How To Compile The 3 Items Needed To Begin MIT’s Free Xv6 Online Operating System Course!

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Not_Oles
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Mar 30, 2022
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In a previous post I invited folks to join me in auditing MIT's Free Online Operating System Course. This post outlines what I have done to get ready to run MIT's teaching operating system, Xv6, on my...

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How To Compile The 3 Items Needed To Begin MIT’s Free Xv6 Online Operating System Course!

Tutorial: Moving a Proxmox VM to Different Disk

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raindog308
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Mar 17, 2022
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I've setup a home virtualization lab using ProxMox, which is a free and very powerful virtualization host. Prior to ProxMox, I tried: VmWare ESXi: No clones in the free version?  See ya. XCP-ng: Got s...

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Tutorial: Moving a Proxmox VM to Different Disk

Invitation To Join Me For MIT’s Free Online Operating System Course!

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Not_Oles
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Mar 13, 2022
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Did you ever have something you wanted to do for a long time but never actually started? Maybe something that seemed too big or too difficult? For a long time I've wanted to take MIT's Operating Syste...

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Invitation To Join Me For MIT’s Free Online Operating System Course!

Setting Up an Email Server; Delivery Issues When Sending From A Clean IP

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Not_Oles
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Mar 11, 2022
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I. Setting Up Our Own Email Server If we are here on the Low End because we are starting or running a business, then email definitely will be on our list of needed features. Many of our wonderful Low...

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Setting Up an Email Server; Delivery Issues When Sending From A Clean IP

Run a $8 Million Mainframe at Home for FREE!

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raindog308
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Mar 05, 2022
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In the mid-70s, my father worked in the American automotive industry in Michigan, and I visited him at work as a small boy.  He took me into the "computer room" (as they used to call datacenters) and...

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Run a $8 Million Mainframe at Home for FREE!

Virtfusion + ExtraVM = 7 Second, Super Easy Linux Install!

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Not_Oles
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Mar 04, 2022
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@Phill from Virtfusion is launching his new virtualization management utility, also called Virtfusion. @MikeA at ExtraVM already has Virtfusion up and running at OVH Gravelines Data Center. When @Mike...

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Virtfusion + ExtraVM = 7 Second, Super Easy Linux Install!

@Ympker’s Cool WordPress Plugin to Ease GDPR Compliance!

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Not_Oles
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Feb 26, 2022
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As reported here on Low End Box a few days ago, a German court found that the European Union's General Data Protection Regulation (GDPR) required website hosts to avoid sharing readers' IP addresses w...

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@Ympker’s Cool WordPress Plugin to Ease GDPR Compliance!

How to Transfer a Kimsufi Server

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raindog308
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Feb 18, 2022
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Great tutorials should be concise.  How concise?  How about 27 words? LowEndBox would like to give a shout-out to LowEndTalk member @skorupian setting a new world record for the shortest quality tutor...

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How to Transfer a Kimsufi Server

Painless Removable Media Backups…to the Cloud!

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raindog308
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Jan 17, 2022
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Do you still use USB thumb drives?  Flash or SD or MicroSD cards?  Portable hard drives? Even in this age of ubiquitous cloud, there's still a ton of bits and bytes being carried around in people's ba...

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Painless Removable Media Backups…to the Cloud!

Have You Checked Out Our Tutorials?

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raindog308
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Nov 25, 2021
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Sure, you come to LowEndBox to get great deals, but did you know you can also learn a thing or two here? We have over 250 tutorials we've published over the years on topics such as Linux VPS administr...

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Have You Checked Out Our Tutorials?

Why Do My Files Have Quotes in the Them When I Use ‘ls’?

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raindog308
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Oct 20, 2021
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If you've upgraded to a recent Linux version, you may have noticed a change in the output of your ls commands. Specifically, files that have spaces or other special characters in them are quoted. For...

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Why Do My Files Have Quotes in the Them When I Use ‘ls’?

How to Update Intel Microcode on Debian 11 Bullseye

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raindog308
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Oct 17, 2021
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Not long ago I noticed this message when booting one of my home systems: "TSC_DEADLINE disabled due to Errata; please update microcode to version: 0x22 (or later)" I wasn't having any issues with the...

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How to Update Intel Microcode on Debian 11 Bullseye

LowEndSetup: Initializing and Reinitializing Your VPS

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raindog308
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Oct 14, 2021
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If you frequently setup new VPSes or re-initialize them, you may find yourself typing the same commands over and over. There are various technologies to alleviate these hassles and get your environmen...

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LowEndSetup: Initializing and Reinitializing Your VPS

Locking Down Access to Your VPS

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raindog308
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Oct 12, 2021
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There are a number of ways you can restrict access to your VPS. Passwords (specifically, good passwords) is the most basic method. Restricting access to ssh keys only is better. You can use Google Aut...

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Locking Down Access to Your VPS

How to Audit Every Command Run on Your Linux System

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raindog308
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Oct 07, 2021
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Periodically I've had auditors come to me and say "can you tell me what this user on this system did between such-and-such dates/times" and my answer is usually no. By default, Linux systems don't log...

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How to Audit Every Command Run on Your Linux System

SQL vs. NoSQL – Which is Better?

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raindog308
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Oct 02, 2021
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In the world of database systems, SQL has been the king since it took off in the early 80s.  It was conceived, developed, and codified in the 1970s but really hit its stride once developers had worked...

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SQL vs. NoSQL – Which is Better?

Nodes and Modes: Maintaining Galera Replication for MariaDB

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raindog308
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Sep 23, 2021
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In a previous tutorial, we showed you how to setup Galera replication for MariaDB so you could have multi-node, multi-master clusters.  We also saw how MariaDB painlessly replicates data.  In this tut...

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Nodes and Modes: Maintaining Galera Replication for MariaDB

Painless MariaDB Replication with Galera Clusters

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raindog308
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Sep 22, 2021
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Galera is MariaDB's multi-master replication technology which makes it a snap to setup highly-available multi-node MariaDB clusters.  In this tutorial we'll walk through setting up a cluster and also...

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Painless MariaDB Replication with Galera Clusters

Easy Operating System Detection with nmap

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raindog308
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Sep 18, 2021
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Recently I was doing some discovery at work of some systems we inherited.  I didn't yet have access but wanted to determine what type of OS was involved so I could coordinate with the proper teams. Yo...

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Easy Operating System Detection with nmap

Get Notified via Email Whenever Someone Logs In To Your VPS

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raindog308
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Aug 08, 2021
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In this tutorial we'll show you how to configure your VPS so that every time someone logs in, you receive an email alerting you to this fact. This is kind of a "lowend intrusion detection system" thou...

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Get Notified via Email Whenever Someone Logs In To Your VPS

How to Verify WHMCS Licenses

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raindog308
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Jul 26, 2021
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When new provider submit offers, one of the many checks we perform is to see if their WHMCS license is valid (assuming they're using WHMCS of course). Generally about once a month we get an offer from...

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How to Verify WHMCS Licenses

How to Check Out Your Dedicated Server’s Hard Drive

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raindog308
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Jul 21, 2021
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With the rise of Chia farming, many hard drives provisioned in LowEnd dedicated servers are arriving having suffered phenomenal (ab)use.  Sure, your dedi provider is usually on the hook to replace if...

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How to Check Out Your Dedicated Server’s Hard Drive

How to Stiff-Arm Brutes and Protect Your Server with Fail2Ban

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raindog308
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Jul 20, 2021
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Bruce force attacks are attempts to guess common passwords by repeatedly trying to login to your server.  SSH is the most common target but FTP, IMAP, POP3, and other password-based systems can be tar...

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How to Stiff-Arm Brutes and Protect Your Server with Fail2Ban

Tarsnap: Cloud Backups for the Truly Paranoid

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raindog308
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Jul 18, 2021
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Comments (5)

Tarsnap is a cloud backup company that emphasize strong cryptography. It's the brainchild of Dr. Colin Percival, former FreeBSD security officer. Its motto is "online backups for the truly paranoid" a...

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Tarsnap: Cloud Backups for the Truly Paranoid

How to install PHP 7.4 with Nginx and Apache on Ubuntu

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raindog308
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Jul 14, 2021
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This article was contributed by Dustin Cisneros at RackNerd, a web hosting and infrastructure as a service provider which was recently voted #1 by the LowEndTalk community! If you are looking for a Li...

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How to install PHP 7.4 with Nginx and Apache on Ubuntu

One Folder to Rule Them All: Running Dropbox Headless on Your VPS

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raindog308
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Jul 08, 2021
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Dropbox is a folder synchronization product that takes a folder (eponymously called Dropbox) and makes sure it's identical across all devices.  This folder is also available on the web and there are r...

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One Folder to Rule Them All: Running Dropbox Headless on Your VPS
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