How to change the hostname in RHEL7

At last, Red Hat has decided to act like other distros to change the hostname of the server in Red Hat Enterprise Linux 7.

In older Red Hat releases, changing the hostname required modifying the  “/etc/sysconfig/network” configuration file and edit the “HOSTNAME” parameter.

Now, all you have to do is – like other distros such as Ubuntu and LinuxMint – edit the “/etc/hostname” file and change the name there, that’s it!

Posted in Linux | Tagged , , , | Leave a comment

Linux & Antiviruses; A must-read for any Linux newbie or wannabe

A very nice article from the Ubuntu docs. It covers many questions that might arise with new Linux users or those who plan to switch to Linux.

It covers questions like:

  • Why do I need anti-virus software on Linux?
  • What are the available Open Source and Commercial Antiviruses for Linux?
  • Why is Linux less prone to malware?

I highly recommend reading it.

https://help.ubuntu.com/community/Antivirus

Posted in Linux | Tagged , , , , | Leave a comment

How to manually upgrade your Ubuntu/LinuxMint installation in one command

Haven’t blogged for a long time, so here is a little treat for those control freaks who want to do everything themselves. For you to upgrade your Ubuntu-based Linux distro, you have to do 2 steps:

  1. Refresh the software repositories
  2. Run the upgrade command

In short, here is the command:

sudo apt-get update && sudo apt-get -y dist-upgrade

Posted in Uncategorized | Tagged , , , , , | Leave a comment

How to add Application Icons to Ubuntu

Just copy your PNG icon file to /usr/share/icons/hicolor/[SIZE]/applications

Then run the command: “sudo gtk-update-icon-cache /usr/share/icons/hicolor”

That’s it!

Posted in Linux, Mint, Ubuntu | Tagged , , , , , | Leave a comment

How to connect to a VM hosted on QEMU remotely using virt-viewer

I couldn’t find comprehensive articles about this, so I decided to write one myself.

In brief, here is a sample command:

virt-viewer --connect qemu+ssh://aamr@hobba/system winVM

Where:

virt-viewer: is the command itself
–connect: is obviously the parameter telling the command to connect!
qemu+ssh: telling virt-viewer that this host is reachable via SSH and QEMU is used for virtualization (since it supports Xen as well)
aamr: is the SSH username
hobba: is the remote server name
system: is a static word, just type it as it is!
winVM: The name you gave to the Virtual Machine

Anyway, I prefer spicy over it, although it’s not recommended.

Enjoy!

Posted in Linux, Mint, Ubuntu, Virtualization | Tagged , , , , , , | 1 Comment