DiffPDF is a GUI application used to compare two PDF files.By default the comparison is of the text on each pair of pages, but comparing the visual appearance of pages is also supported (for example, if a diagram is changed or if a paragraph is reformatted). It is also possible to compare particular pages or page ranges. …
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Diffpdf – Compare two PDF files textually or visually (UbuntuGeek)
Working remotely is not a new thing for Linux Administrators. Especially when he/she is not in front of the server. Generally, the GUI is not installed by default on Linux servers. But there may some Linux Administrators who choose to install GUI on Linux servers.
When your server has a GUI, you may want to remote the server with full desktop experience. To do that you may install VNC Server on that server. In this article, we will cover about NoMachine as an alternate Remote Desktop Tool.
What is NoMachine
NoMachine is a remote desktop tool. Just like VNC. So what is the difference between NoMachine with the other? The most important factor is speed. The NX protocol provides near local speed responsiveness over high latency and low bandwidth links. So it feels like you were directly in front of your computer.
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NoMachine – An Advanced Remote Desktop Access Tool (Tecmint)
Having a server or computer connected to a network comes with a certain amount of risk. Any machine, including a VPS, connected to the internet is a potential target for malicious attacks.
While having a well-configured firewall will prevent many kinds of illegitimate access, you still need to open up certain services to allow yourself the ability to log in and administer the server. SSH is the service most commonly used to log into remote systems, and so it also is one of the most frequently targeted.
Fortunately, there is a tool available that can mitigate this attack vector, called fail2ban. This can be configured to allow legitimate logins using SSH, but ban IP addresses after they have failed to authenticate correctly after a set number of times.
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How To Protect SSH with fail2ban on Debian 7 (DigitalOcean)
In the previous article entitled “Basic Linux Shell Scripting Language : Introduction to ‘For’ Loops“, we have observed how a loop works. Loop is nothing but a control flow statement which executes a block of commands repeatedly till certain condition stays true, once the condition becomes false, the loop is terminated.
In this article, I will explain Basic syntax of ‘While’ loop along with some examples of ‘While’ loop usage. If you are new to Shell Scripting, I recommend that, you should read my article – Getting Started – Linux Shell Scripting Language.
One of the things we found interesting in this article is that it shows how to use an infinite ‘while’ loop that can only be broken out of by some specific event or condition. Very basic stuff, but something that can come in quite handy in certain situations.
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Basic Linux Shell Scripting Language : ‘While’ Loops (Your Own Linux..!)
While putting together some future articles I wanted to take some screen shots within LXDE, the Pi’s default graphical interface.
I considered taking them on my PC using a remote desktop connection to the Pi but I thought it might be easier to just take them directly on the Pi as I used it.
To do this I decided to use Scrot which is a command line screen capturing utility.
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How To Take Screenshots On The Raspberry Pi (Raspberry Pi Spy)
One of the most used tool in Linux is ‘apt’. So, if you are a Linux user or if you are planning to give it a try, there is a 100 per cent chance that you will stumble upon apt. The fact is that ‘apt-get’ is one of the biggest contributer in making the Linux life so much easier. With this, you do not have to worry about how to install and remove software on the Debian GNU/Linux distributions.
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In simple words, if you need to install, remove and update packages apt is the tool for you. Here are 10 utilities that ‘apt’ can bring to your Linux machine:
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10 Things And More That ‘apt’ Can Help You With! (EFYTimes)
PiCon is a Raspberry Pi configuration manager which lets you make changes to the config.txt file using a GUI. The config.txt file is used to store various system parameters that you would normally set from the BIOS, but Raspberry Pi doesn’t have a conventional BIOS and thus, it uses this file for such settings.
The application is designed to run on a host system (works on Windows, Linux and Mac since it’s written in Java) and not directly on the Raspberry Pi. It is possible to run the app on Raspberry Pi, but the performance is pretty bad.
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Raspberry Pi Configuration Manager `PiCon` Lets You Configure Your Pi Using A GUI (WebUpd8)
Suppose you have a collection of files which are replicated on two different servers. The two replicas are then modified independently, and you want whatever changes made in one replica to be propagated to the other, so that both replicas remain in sync.
There are several file mirroring tools on Linux, such as rsync or duplicati. However, these tools are meant for “uni-directional” file sync (i.e., pushing or pulling incremental updates in one direction), and so two-way sync would require running such tools twice, one for each direction.
Unison is an open-source file synchronization tool that natively supports bi-directional file synchronization. Unison is available on multiple platforms including Linux, FreeBSD, Windows and MacOS X. In Linux, Unison is available as a command-line tool as well as a GUI program with GTK+ interface.
In this tutorial, I will describe how to synchronize files between two servers with Unison command-line utility.
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How to synchronize files between two servers (Xmodulo)
Here we plan to review all kinds of array operations in Bash. It is part of an ongoing Bash Tutorial series.
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The Bash Array Guide With Examples (EFYTimes)
Shell In A Box (pronounced as shellinabox) is a web based terminal emulator created by Markus Gutschke. It has built-in web server that runs as a web-based SSH client on a specified port and prompt you a web terminal emulator to access and control your Linux Server SSH Shell remotely using any AJAX/JavaScript and CSS enabled browsers without the need of any additional browser plugins such as FireSSH.
In this tutorial, I describe how to install Shellinabox and access remote SSH terminal using a modern web browser on any machine. Web-based SSH is very useful when you are protected with firewall and only HTTP(s) traffic can get through.
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Shell In A Box – A Web-Based SSH Terminal to Access Remote Linux Servers (TecMint)
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