Category: Linux

Links: 14 Useful Examples of Linux ‘sort’ Command, 7 Interesting Linux ‘sort’ Command Examples

Sort is a Linux program used for printing lines of input text files and concatenation of all files in sorted order. Sort command takes blank space as field separator and entire Input file as sort key. It is important to notice that sort command don’t actually sort the files but only print the sorted output, until your redirect the output.

This article aims at deep insight of Linux ‘sort‘ command with 14 useful practical examples that will show you how to use sort command in Linux.

Full articles from Tecmint here:
14 Useful Examples of Linux ‘sort’ Command – Part 1
7 Interesting Linux ‘sort’ Command Examples – Part 2

Link: How to use FFMpeg to do simple audio conversion

Here’s a simple FFmpeg how to that will cover just a portion of the framework’s abilities. We will see how you can use the terminal to perform simple conversions of various audio file types including all popular and widely available formats. Using FFmpeg right from the terminal makes it better for performance compared to downloading and installing a GUI tool for FFmpeg, and can also offer more precise settings for the advanced users.

Full article here:
How to use FFMpeg to do simple audio conversion (Howtoforge)
Related: Combine Audio and Video with ffmpeg (David Walsh)

Link: An Introduction To MySQL Database

MySQL is an open source database management software that helps users store, organize, and retrieve data. It is a very powerful program with a lot of flexibility.

This tutorial will explains how to install MySQL, create a sample database, create a table, insert records into the table, and select records from the table.

Full article here:
An Introduction To MySQL Database (Unixmen)

Link: Introduction to Samba – Share Files and Directories between Linux, Windows and Mac

Samba is the most popular and efficient way with which you can share your files and directories between Linux, Windows and Mac. You just have to create a Samba user, Decide which file/directory you wish to share and Set the permissions, in order to create a Samba share. Well, initially, this might seem to be difficult- especially for beginners, but when you understand all the configuration options, it will seem to be as simple as anything.

This tutorial will explain how to share files and directories on Linux with Windows and Mac clients.

Full article here:
Introduction to Samba – Share Files and Directories between Linux, Windows and Mac (Your Own Linux..!)

Link: How to access a Linux server behind NAT via reverse SSH tunnel

You are running a Linux server at home, which is behind a NAT router or restrictive firewall. Now you want to SSH to the home server while you are away from home. How would you set that up? SSH port forwarding will certainly be an option. However, port forwarding can become tricky if you are dealing with multiple nested NAT environment. Besides, it can be interfered with under various ISP-specific conditions, such as restrictive ISP firewalls which block forwarded ports, or carrier-grade NAT which shares IPv4 addresses among users.

What is Reverse SSH Tunneling?

One alternative to SSH port forwarding is reverse SSH tunneling. …..

Full article here:
How to access a Linux server behind NAT via reverse SSH tunnel (Xmodulo)

Link: How to set up NTP server in CentOS

Network Time Protocol (NTP) is used to synchronize system clocks of different hosts over network. All managed hosts can synchronize their time with a designated time server called an NTP server. An NTP server on the other hand synchronizes its own time with any public NTP server, or any server of your choice. The system clocks of all NTP-managed devices are synchronized to the millisecond precision.

In a corporate environment, if they do not want to open up their firewall for NTP traffic, it is necessary to set up in-house NTP server, and let employees use the internal server as opposed to public NTP servers. In this tutorial, we will describe how to configure a CentOS system as an NTP server. Before going into the detail, let’s go over the concept of NTP first.

Full article here:
How to set up NTP server in CentOS (Xmodulo)

Link: How to Install and Configure NTP (Network Time Protocol) Server/Client in Debian Linux

Network Time Protocol (NTP) presents an unique ability for companies to synchronize the clocks of all the systems within the company. Time synchronization is important for many reasons ranging from application time stamps to security to proper log entries. When an organization’s systems all maintain different clock times, it becomes very difficult from a troubleshooting standpoint to determine when and under what conditions a particular event might be occurring.

NTP provides an easy way to ensure that all systems will maintain the correct time which in turn can greatly simplify the burden on administrators/tech support.

Full article here:
How to Install and Configure NTP (Network Time Protocol) Server/Client in Debian Linux(Tecmint)

Link: DD Utility – Easily Backup and Restore Disk Image Files In Ubuntu

The legacy DD is a command line utility for UNIX like operating systems. DD stands for Data Description and the utility empowers the user to copy and convert files but it is a command line utility without any Graphical User Interface (GUI). DD utility can copy and convert simple files, device drivers (e.g for CD ROM, LAN, Speakers, HDD etc) and can access boot sector information that is why it can be used to prepare bootable backup and restore images. It performs the conversions to and from ASCII to EBCDIC, furthermore, it performs the byte order swapping as well. The name of the utility i.e DD seems to have been extracted from IBM’s Job Control Language (JCL) where it appears in a number of command statements.

This article is about a variant of DD command line utility with Graphical User Interface (GUI) i.e dd Utility. It is partially cross platform that is it works on UNIX like operating  Linux Ubuntu and Apple’s Mac OS X.

Full article here:
DD Utility – Easily Backup and Restore Disk Image Files In Ubuntu (LinOxide)

Link: Sed – An Introduction and Tutorial by Bruce Barnett

How to use sed, a special editor for modifying files automatically. If you want to write a program to make changes in a file, sed is the tool to use.

There are a few programs that are the real workhorse in the UNIX toolbox. These programs are simple to use for simple applications, yet have a rich set of commands for performing complex actions. Don’t let the complex potential of a program keep you from making use of the simpler aspects. I’ll start with the simple concepts and introduce the advanced topics later on.

Full article here:
Sed – An Introduction and Tutorial (Grymoire)