Архив метки: bash

How to use the Linux screen command to keep your remote processes running

Автор: | 16.05.2018

How many times have you secure shelled into your data center Linux servers, only to have (for whatever reason) your remote secure shell connection broken? When you reconnect to that server, is that critical command you issued still running? Or did the severed connection put the kibosh on the command? Not only can this be… Читать далее »

How to install OpenStack on Ubuntu Server with DevStack

Автор: | 03.05.2018

OpenStack is a free, open source platform developed specifically for cloud computing. Through this cloud-centric platform, virtual machines and other resources can be made available to clients as Infrastructure-as-a-Service. There are a number of ways to get OpenStack installed—some are much more challenging than others. One such means of installing OpenStack is through DevStack. DevStack… Читать далее »

How to monitor a Linux log file in real time

Автор: | 30.04.2018

Quick: What’s the first thing you do when you need to troubleshoot a Linux server? If you answered, «Check log files,» give yourself a cookie because you answered correctly. A follow up question: What do you do when you need to watch those log files in real time? Do you view that log with the… Читать далее »

How to create a bash script for starting VirtualBox VMs

Автор: | 26.04.2018

Image: Jack Wallen There’s a nifty feature that comes with VirtualBox that allows you to create a desktop shortcut for virtual machines. This, however, doesn’t do you much good if you’re running VirtualBox on a GUI-less server. If that’s the case, you don’t always want to have to issue the command to start a VM… Читать далее »

How to install crontab-ui for remote use

Автор: | 26.04.2018

Image: Jack Wallen If you’re a Linux administrator, you know how important it is to be able to schedule the running of various applications and scripts. You might have created a brilliant backup script that does exactly what you want, when you want it. However, that backup script isn’t going to automatically run without the… Читать далее »

How to easily edit a network connection on a CentOS 7 minimal installation

Автор: | 20.04.2018

Image: CentOS CentOS 7 is a very powerful server platform. With this open source, enterprise-ready Linux distribution, the sky is the limit with what you can do. You can install it with a GUI to make things easy, but that takes up system resources. To that end, you might well have installed CentOS 7 as… Читать далее »

8 hard truths about working in cybersecurity

Автор: | 13.04.2018

My career working as a system administrator has involved a hefty amount of exposure to the cybersecurity realm, particularly while working for financial organizations. As data breaches continue to occur through a myriad of exploits (both technological and through human error) the stakes are constantly rising. We’ve reached a level where careers are built —… Читать далее »

How to set up a GitLab server and host your own Git repositories

Автор: | 12.04.2018

Image: Jack Wallen If you’re a Git user, you know that having local repositories that can be accessed via a local LAN (or external WAN) is a crucial element of the development process. You can certainly opt to go with GitHub, but that negates the ability to host locally. So when you want to host… Читать далее »

How to fix an incorrect Linux shell

Автор: | 10.04.2018

When you create a new user in Linux with the useradd command, it not only creates the new user, but can also generate the new user home directory, enable bash history, and a number of other necessary features for proper user functionality. But sometimes something goes wrong and you are faced with either deleting the… Читать далее »

How to install the GNS3 network emulator on Ubuntu

Автор: | 06.04.2018

Image: Jack Wallen If you’re a network administrator, you know how valuable good tools are. Most everyone knows about tools like traceroute, ping, Wireshark, iPerf, and Nmap—tools that help you sniff out issues on your currently running network. But what about when you are in the design phase of your network? Do you rely on… Читать далее »