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15 April
Posted in Linux, Security

What are major security issues related to TrueCrypt?

There are two major types of attack to TrueCrypt’s volumes. 1) Keylogger (software or hardware) – it’s obvious, and this isn’t a TrueCrypt problem. Hence I won’t write about this. Just – be careful if you mount a TC volume on unknown or foreign machines. You should suppose that each […]

5 October
Posted in Linux

How to improve speed of your Linux desktop

I’m showing only software tricks, disc replacement (from hdd to ssd) and other hardware optimization will be skipped in this article.   1) It may sounds confused but …try to avoid more “automatic” linux distributions as Ubuntu, Mint, etc. These distributions have many automatic programs to improve their abilities for a beginner user, […]

8 September
Posted in Bash, Linux

Basics of writing bash scripts, improving your command line

Sometimes many commands in linux based systems are too complicated to remember or use them. Many options/prefixes are quite problematic as well. I had had this problem some years ago and I coped with it. I used imagemagick and I needed some improvements to my work because of imagemagick’s syntax. […]

15 August

WordPress on nginx – how to secure the admin panel

Many people know that the admin panel in the wordpress is located in wp-admin/ dir so we can open it trying an adress domain-of-wordpress-blog/wp-admin. This is no comfortable situation because spambots know it as well. Of course, the first step to improve your security should be a secure password – […]

15 July
Posted in Bash, Linux, Security

How to automatically encrypt backup files

In the most serious companies, backup is a really important thing, one of the most important probably. But sometimes more important is a question about security of this saved data. Usually backup is comprehensive of data from many systems and it’s stored in a special device (NAS). This data is […]

5 July
Posted in Bash, Linux, PHP, Projects

Dynamic dns based on a bash and php script

Having dynamic IP address is full of hindrances if you want to use your machine from other place in the world. But if you have your own domain, a linux based desktop and server (which manages of your domain) I can help you probably. I have used this script for […]

2 July
Posted in Bash, Linux

Basics of writing bash scripts, a simple network tester

Sometimes my internet connection is rubbish. Nowadays this scenario shouldn’t happen ever, but the real life is much brutal, as you know. Especially in Poland. So, my life insists me to do something strange things in my computers and here is an ordinary example. I wrote my simple script some […]

21 June

How to completely hide your network traffic

In this article I explained what may see your Internet Service Provider. Now, I will write some information about how to protect your network traffic.  My solution is based on a bash script on a client and a server. The script works on the client computer, connects to the server […]

13 June
Posted in Bash, Linux, Security

Basics of writing bash scripts, autoblocking ssh break in attempts

This script is a typical problem of the reinvention wheel, because there are many programs, which may prevent from robots which are try to guess the passwords in the ssh service. If you don’t trust your security skills, you should use them or read this text. I will try to […]

21 May

Secure configuration of OpenSSH

OpenSSH is a service designed for a remote management so secure configuration of it is mandatory. I show some useful tricks to make your OpenSSH safer. I describe options from the main configuration file of the OpenSSH service – in most distributions it is at /etc/ssh/sshd_config   1) Turn off […]