Linux For Beginners & Advanced Users

Tutorials, howtos, faqs, hacks, and tips about GNU/Linux operating systems for Linux users sorted by easy, intermediate and advanced level. ( rss feed ).

I‘m a new Ubuntu Linux user. How do I install the LEMP stack on an Ubuntu Linux 14.04 LTS server using command line options to serve dynamic web apps?

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I‘m a new Linux / Unix system user. How can I set encrypted tunnel between my desktop/laptop computer and server in a remote data center to bypass the limits in a network? How do I create a reverse SSH tunnel on Unix-like systems?

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I run a multi-user system. Most users access resources using ssh client. How to stop leaking process information to all users on Linux operating systems? How do I prevent users from seeing processes that do not belong to them on a Debian/Ubuntu/RHEL/CentOS Linux server?

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How can I analyze line rate taking log file as input on a Linux system? How do I find the IP flooding my Apache/Nginx/Lighttpd web-server on a Debian or Ubuntu Linux?

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I have created/launched Amazon Machine Image (AMI) instance powered by a CentOS/RHEL/Red Hat Enterprise Linux. How can I connect to my instance using OpenSSH Linux/Unix/OSX ssh client?

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I am a new Ubuntu Linux and bash shell user. I also know how to redirect output from display/screen to a file using the following syntax:

cmd > file
ls > file

However, some time errors are displayed on screen. How do I store and redirect output from the computer screen to a file on a Linux or Unix-like systems?

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I‘m a new Linux system user. I need to cleanup in a download directory i.e. delete all files from ~/Downloads/ folders except the following types:

*.iso – All iso images files.
*.zip – All zip files.

How do I delete all file except some in bash shell on a Linux, OS X or Unix-like systems?

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