You can find here all the tutorials. This website offers tutorials related to IT and technology.
How to create a fail2ban filter for the application "matrix" (matrix-synapse).
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How to unban an ip address which us blocked by fail2ban jail. An own command and program is available to manage blocked ip addresses.
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Show the biggest files with their size in the file system or in a certain folder.
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How to search for a certain word, text, or number (text pattern) in all files.
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Search in linux for a file with a certain file name pattern.
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All tutorials related to Linux. Linux server administration, Linux security and more.
All Tutorials related to FreeBSD.
These are a little bit similar to other BSD-like distributions.
Tutorials and information about everything related to the programming language Python.
Everything related to the programming language Javascript and frameworks for Javascript.
All tutorials and information related to Java, JSF and frameworks that are used in Java programming.
Everything about programming in Android. Create your own smartphone app with Android.
Web development stacks and programming languages (for example: MEAN, Angular, etc.), HTML and CSS.