Mastering OpenSSH – Part 1: Installing the OpenSSH server

When it comes to secure connections between two computers, SSH (SSH = Secure Shell) is the drug of choice. Thus for example you can remotely control your home- or web-server by an encrypted connection via SSH. How to install the OpenSSH server (software) on Linux (Ubuntu) and establish and secure the connections, is what I want to show to you in the following series of articles.
As an example scenario, we assume that we have a Linux machine which acts as a server and two computers, one with Ubuntu Linux and one running Windows 8, which represent our clients.
OpenSSH server installation
The first step is to download the server software. The SSH client (for connecting the server with another PC/server for example) can be installed as well if needed.

sudo apt-get update
sudo apt-get install openssh-server openssh-client

After the installation of the OpenSSH server you may need to start the service manually. This can be […]

How to set default color scheme in vim

After I’ve shown you Vim and explained the most essential commands, there is  is another tip I’ll give to you. As described in the above linked article, Vim brings a really nice syntaxhightlighting implementation with it. Unfortunately, this is by default, depending on the file type and your monitor, difficult to read. So today I want to show you, how you can modify the Vim syntax highlighting scheme.
Change Vim syntaxhightlighting color scheme
Once you’ve opened Vim, you can change the color scheme with the “colo”-command.

:colo murphy

As you can see, the color scheme is set off from the command mode. In this case, the command is “colo” followed by a space and the name of the color scheme you want to use. (If you like, you can use “colorscheme” instead of “colo”. “colo” is just a shortcut to “colorscheme”.)
vim colo murphy  vim [...]
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Vim tutorial for beginners

vim screenshotVim is an open source text editor that runs on Linux, MacOSX, Windows and many other operating systems. If I had to describe it in just one word, then the first thing I can think of would be “powerful”. Vim supports syntax highlighting for really almost any format and has got many other extras.
But “powerful” also describes the learning curve, because Vim can be fully controlled via the keyboard. There are tons of commands and shortcuts you can learn. But however, if you once learned how to handle Vim it is a wonderful tool. Just the fact that Vim can actually be found on nearly any Linux system, no matter where and under what distribution you are currently working, is a good reason to learn at least the basics […]

How to increase storage on TP-Link WR703N with ExtRoot

tp-link wr703n with thumbdriveA few days ago I wrote about how you can flash OpenWRT on the TP-Link WR703N router and build a ~20$ cheap OpenWrt router this way. OpenWrt actually works quite well on the WR703N, but in retrospect the following problem arises.
Unfortunately the WR703N has only 4MB flash (memory), so (depending on the selected image/firmware) after installing OpenWrt there will be just about 900 kB of free memory available. If you now want to install one or more extensions for OpenWrt, which in my opinion is one of the main benefits of using a OpenWrt system, you will be confronted with “no space available” messages in really no time. One solution to “bypass” this problem is to “ExtRoot” your router.
ExtRoot is a functionality that can be used to outsource the OpenWrt file system of the router […]