Category: Linux

Setup Local Mail Server Using Postfix, Dovecot And Squirrelmail on CentOS 6.5/6.4 or OpenSUSE 13.x

Postfix is a free open source mail transfer agent (MTA). It is easy to administer, fast and as well as the secure MTA. It’s an alternative to Sendmail, which is the default MTA for RHEL.

Well, let us see how to setup a basic local mail server using Postfix, Dovecot and Squirrelmail On CentOS 6.5 [or Opensuse], although it should work on RHEL, Scientific Linux 6.x series [or SLES Servers].

Full articles here, from Unixmen:
Setup Local Mail Server Using Postfix, Dovecot And Squirrelmail On CentOS 6.5/6.4
Setup Local Mail Server Using Postfix, Dovecot And Squirrelmail On OpenSUSE 13.x

Link: How to record and replay a terminal session on Linux

Suppose you are a go to person among your friends and family when it comes to Linux related questions. Someone asked you how to install and configure a tool, and you wanted to show the procedures. How would you do that if he or she is not in front of you? There could be various ways (e.g., by documenting and emailing the procedures, or explaining verbally over the phone, etc), but probably the most clearcut solution would be to demonstrate it yourself. If the demonstration only requires a terminal, then the best way would be use terminal screencast or terminal session recorder.

In this tutorial, I am going to demonstrate how to record and replay a terminal session on Linux.

Full article here:
How to record and replay a terminal session on Linux (Xmodulo)
Related:
2 Simple Applications That Record Your Terminal Session as Video [Linux] (Make Tech Easier)

Link: linux-dash: Monitors “Linux Server Performance” Remotely Using Web Browser

If you are looking for a low resource, speedy server statistics monitoring script, look no further than linux-dash. Linux Dash’s claim to popular is its slick and responsive web dashboard that works better on large and small screens.

linux dash is a memory efficient, low resource, easy to install, server statistics monitoring script written in PHP. The web statistics page allows you to drag and drop the various widgets and rearrange the display as you desire. The script displays live statistics of your server, including RAM, CPU, Disk Space, Network Information, Installed Software’s, Running Processes and much more.

Full article here:
linux-dash: Monitors “Linux Server Performance” Remotely Using Web Browser (Tecmint)

Link: 8 commands to check cpu information on Linux

CPU hardware information

The cpu information includes details about the processor, like the architecture, vendor name, model, number of cores, speed of each core etc. There are quite a few commands on linux to get those details about the cpu hardware, and here is a brief about some of the commands.

Full article here:
8 commands to check cpu information on Linux (BinaryTides)
Related:
How To Check CPU Information In Three Different Ways In Linux (Unixmen)

Link: Configurable Notification Bubbles For Ubuntu 14.04 LTS (Close On Click, Change Position, Colors, Size And More)

The patched NotifyOSD adds the following features to Ubuntu’s default notifications (all are optional of course):

  • close on click: the notifications can be configured to close when clicked on;
  • themes support: change color, width, height, font size, opacity, icon size and more;
  • working timeout option (“-t”);
  • change the notification position: top-right, middle-right, bottom-right, bottom-left, middle-left and top-left corners;
  • prevent the notification bubbles from fading out when the mouse pointer hovers over them.

Full article here:
Configurable Notification Bubbles For Ubuntu 14.04 LTS (Close On Click, Change Position, Colors, Size And More) (Web Upd8)
Related:
Customize Bubble Notifications as you like in Ubuntu 14.04/13.10/12.10/12.04 (PPA) (NoobsLab)

Link: How to Bind Shortcut Keys to WINE Programs in Linux

So you love your Linux machine, but you must have that one (or probably a few) Windows program working on your machine. You found what felt like a magic wand, and installed Wine. But when you go to use that favorite app, the shortcut keys you’re used to in the Windows world just don’t work here in Linux! So what do you do?  We’ll show you how you can map and bind shortcut keys to your Wine program. We assume you already have Wine installed.

Full article here:
How to Bind Shortcut Keys to WINE Programs in Linux (Make Tech Easier)

Link: SSH Kung Fu

OpenSSH is an incredible tool. Though primarily relied upon as a secure alternative to plaintext remote tools like telnet or rsh, OpenSSH (hereafter referred to as plain old ssh) has become a swiss army knife of functionality for far more than just remote logins.

I rely on ssh every day for multiple purposes and feel the need to share the love for this excellent tool. What follows is a list for some of my use cases that leverage the power of ssh.

Full article here:
SSH Kung fu (Tyblog)
Related:
Generate Elliptic Curve (ECDSA) SSH Keys (scottlinux.com)

Link: How To Upgrade Or Switch Linux Distros Without Erasing Your Files

Do you find yourself switching between Linux distributions frequently? When upgrading, do you favor clean installations over in-place upgrades? Do you hate that you have to back up all your personal data, or else lose it?

What if I told you that this doesn’t have to happen?

It’s actually quite easy to switch between different Linux distributions or perform clean installations and still retain all of your personal data. We’ll show you what to do so that you’re all set up no matter your current situation.

Full article here:
How To Upgrade Or Switch Linux Distros Without Erasing Your Files (MakeUseOf)

Link: MacBuntu 14.04 Pack is Released, Transform Ubuntu 14.04 to look like Mac

Mac OS X transformation pack is ready for Ubuntu 14.04 Trusty Tahr. Credit also goes to bluedxca93 from gnome-look.org who helped us with fixing several bugs in the themes (checkout his work, and he also accept donations). Following instructions you can completely change look of your Ubuntu 14.04 LTS to look like Mac. I used following stuff in this pack four GTK themes, three icon themes, boot screen, cursors and LightDM webkit theme (by wattos). Mac themes for Linux are almost stopped but we kept this project on our list from 12.04, and now we have reached to 14.04 with Mac transformation. Many people look over the internet for pre-configured Mac look like Macbuntu 14.04/Mac4lin, Mac Ubuntu theme and so on, but it is good idea to transform it by yourself because if you want to go back to older look or want to change look you can do that easily.

This time NoobsLab is offering four Mac GTK themes, three Mac icon themes, Mac boot screen, and Mac like LightDM theme.

Full article here:
MacBuntu 14.04 Pack is Released, Transform Ubuntu 14.04 to look like Mac (Noobs Lab)
Related:
Mac OS X Theme for Ubuntu 14.04 – Macbuntu Transformation Pack (Smashing Web)

Link: 10 examples of Linux ss command to monitor network connections

In a previous tutorial we saw how to use the netstat command to get statistics on network/socket connections. However the netstat command has long been deprecated and replaced by the ss command from the iproute suite of tools.

The ss command is capable of showing more information than the netstat and is faster. The netstat command reads various /proc files to gather information. However this approach falls weak when there are lots of connections to display. This makes it slower.

The ss command gets its information directly from kernel space. The options used with the ss commands are very similar to netstat making it an easy replacement.

So in this tutorial we are going to see few examples of how to use the ss command to check the network connections and socket statistics.

Full article here:
10 examples of Linux ss command to monitor network connections (BinaryTides)