Use google-authenticator for Fedora Login

Install Google Authenticator for Fedora

If you set up 2-step verification using SMS text message or Voice call and also want to be able to generate codes using the Android, iPhone or a Blackberry, you can use the Google Authenticator app to receive codes even if you don’t have an Internet connection or mobile service.

Prerequisite :-

Android Phone.

Barcode scanner.

Google Authenticator App on Phone.

On Laptop as Follow.

[root@localhost rajat]# yum install google-authenticator -y
Loaded plugins: langpacks, presto, refresh-packagekit
Resolving Dependencies
--> Running transaction check
---> Package google-authenticator-1.0-0.gita096a62.fc19.1.x86_64 will be installed
--> Finished Dependency Resolution

Dependencies Resolved

================================================================================================================
 Package                      Arch           Version                                       Repository      Size
================================================================================================================
Installing:
 google-authenticator         x86_64        1.0-0.gita096a62.fc19.1           fedora          33 k

Transaction Summary
================================================================================================================
Install  1 Package

Total download size: 28 k
Installed size: 56 k
Downloading Packages:
google-authenticator-1.0-0.gita096a62.fc19.1.x86_64.rpm                       |  33 kB  00:00:07
Running Transaction Check
Running Transaction Test
Transaction Test Succeeded
Running Transaction
  Installing : google-authenticator-1.0-0.gita096a62.fc19.1.x86_64                               1/1
  Verifying  : google-authenticator-1.0-0.gita096a62.fc19.1.x86_64                               1/1

Installed:
  google-authenticator-1.0-0.gita096a62.fc19.1.x86_64


Complete!

Add line to following file:- 

#vi /etc/pam.d/gdm-password

auth         required        pam_google_authenticator.so

:wq

Save and close CTRL+D  (Become as normal user.)

$ 

once you type your password next screen you get which is google-authenticator

Using GNOME BOXES Management Virtual Machine. Fedora 19

 Using GNOME BOXES Management Virtual Machine.

Features

    View, access, and use:
        remote machines
        remote virtual machines
        local virtual machines
        When technology permits, set up access for applications on local virtual machines
    View, access, and use virtual machines on removable media
    View, access, and use shared connection / machines
    Share connections?
    Upload / publish virtual machines
    Select favorites
    Search for connections

Use cases

    Connect to a local virtual machine for testing.
    Connecting to a work machine from home.
    Connect to a work machine over a low quality cellular network.

Various operating systems installation ISOs, CD/DVDs and USB sticks:

    Fedora 16 and 17
    Windows XP and 7
    Debian, Ubuntu etc.

Before launching Boxes need check following.

[root@rajat rajat]# setenforce 0

"You need to switch SELinux on host to Permissive mode using command setenforce 0 after each boot."

[root@rajat rajat]# rpm -qa libvirt\* spice\* kvm\*
libvirt-daemon-driver-nwfilter-1.0.5.1-1.fc19.x86_64
libvirt-daemon-driver-qemu-1.0.5.1-1.fc19.x86_64
spice-server-0.12.3-1.fc19.x86_64
libvirt-gconfig-0.1.6-1.fc19.x86_64
libvirt-glib-0.1.6-1.fc19.x86_64
libvirt-daemon-driver-secret-1.0.5.1-1.fc19.x86_64
libvirt-daemon-driver-storage-1.0.5.1-1.fc19.x86_64
libvirt-daemon-kvm-1.0.5.1-1.fc19.x86_64
spice-glib-0.19-1.fc19.x86_64
libvirt-client-1.0.5.1-1.fc19.x86_64
spice-gtk3-0.19-1.fc19.x86_64
libvirt-gobject-0.1.6-1.fc19.x86_64
libvirt-daemon-1.0.5.1-1.fc19.x86_64
libvirt-daemon-driver-nodedev-1.0.5.1-1.fc19.x86_64
spice-vdagent-0.14.0-2.fc19.x86_64
libvirt-daemon-driver-network-1.0.5.1-1.fc19.x86_64
libvirt-daemon-driver-interface-1.0.5.1-1.fc19.x86_64

 

Fedora 19 Schrodinger’s Cat Post Installation Guide

Fedora 19 also known as 19 Schrodinger’s Cat is the latest version of Fedora distro. It comes with many new features and software updates.

Note: Almost every command shown here requires root privileges. So make sure you are logged in as root. Run su command to login as root.

Rpmfusion Repo

RPM Fusion Repository includes variety of applications which are not included in the main distro. Like mp3 codec, multimedia player for playing DVDs and many more.

It is recommended that you install RPM Fusion repo because most of the following packages require you to install RPM Fusion otherwise it may not work

#yum localinstall --nogpgcheck http://download1.rpmfusion.org/free/fedora/rpmfusion-free-release-19.noarch.rpm #yum localinstall --nogpgcheck http://download1.rpmfusion.org/nonfree/fedora/rpmfusion-nonfree-release-19.noarch.rpm

Livna Repo

Some packages require you to install Livna Repo. Simply run he following commands to add and enable livna repo on your system.

#rpm -ivh http://rpm.livna.org/livna-release.rpm #rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-livna

MP3 playback

Rythmbox

Rythmbox is likely that it will be installed by default. If not installed then you can install it very easily.

#yum install rhythmbox

The default installation of rhytmbox wont allow you to play mp3. To play mp3 you need to add the codes

yum install gstreamer-plugins-good gstreamer-plugins-bad gstreamer-plugins-ugly

Amarok

Amarok is the default audio player for KDE. It can also be installed on Gnome.

#yum install amarok phonon-backend-gstreamer

Audacious

Audacious is a winamp like audio player

#yum install audacious audacious-plugins

XMMS

XMMS is another winamp like audio player. And its one of my favorite. Its better than audacious in my eyes

#yum install xmms xmms-mp3

Banshee

Banshee allows you to import CDs, sync your music collection to an iPod, play music directly from an iPod, create playlists with songs from your library, and create audio and MP3 CDs from your music library.

#yum install banshee banshee-community-extensions

Video and DVD Playback

VLC player

VLC player is the best video player for Linux. It is capable of playing almost every video format.

#yum install vlc

XINE

Xine is another video player for Linux. It is very much like vlc player

#yum install xine xine-lib xine-lib-extras-freeworld

Mplayer with SM Player GUI

Mplayer is a VLC player like player for Linux. It is capable of playing almost all video and audio formats.

#yum install mplayer smplayer

Totem

Totem is the default video player for Fedora.

#yum install totem-xine xine-lib xine-lib-extras-freeworld

K9Copy

K9Copy is a free, open source DVD backup and DVD authoring program for Linux

#yum install k9copy

libdvdcss

libdvdcss is a free and open source software library for accessing and unscrambling DVDs encrypted with the Content Scramble System (CSS). libdvdcss is part of the VideoLAN project and is used by VLC media player and other DVD player software such as Ogle, xine-based players, and MPlayer.

#yum install libdvdcss

Adobe Flash Player

Add the Adobe repo

#rpm -ivh http://linuxdownload.adobe.com/adobe-release/adobe-release-i386-1.0-1.noarch.rpm #rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux #yum install flash-plugin




Install Flash Player

#yum install flash-plugin

Acrobat Reader

Add adobe YUM Repo

#rpm -ivh http://linuxdownload.adobe.com/adobe-release/adobe-release-i386-1.0-1.noarch.rpm #rpm --import /etc/pki/rpm-gpg/RPM-GPG-KEY-adobe-linux

Install Adobe reader

#yum install AdobeReader_enu

Google Chrome

Add Google YUM Repo

#vi /etc/yum.repos.d/google.repo

And paste the following

Fedora 32-bit

[google-chrome] name=google-chrome - 32-bit baseurl=http://dl.google.com/linux/chrome/rpm/stable/i386 enabled=1 gpgcheck=1 gpgkey=https://dl-ssl.google.com/linux/linux_signing_key.pub

Fedora 64-bit

[google-chrome] name=google-chrome - 64-bit baseurl=http://dl.google.com/linux/chrome/rpm/stable/x86_64 enabled=1 gpgcheck=1 gpgkey=https://dl-ssl.google.com/linux/linux_signing_key.pub

Save the file using “:wq“.

Install Google Chrome

#yum install google-chrome-stable

Other Applications

Filezilla

Filezilla is a FTP client and its one of the best

#yum install filezilla

7z or p7zip

#yum install p7zip

Unrar

Unrar utility for extracting, testing and viewing the contents of archives created with the RAR archiver version 1.50 and above.

#yum install unrar

Transmission bittorrent client

Transmission is a lightweight bittorrent client for Linux platform.

#yum install transmission

Wine

Wine is a is a compatibility layer capable of running Windows applications on Linux. It can run many windows applications even some games in Linux.

#yum install wine

Gparted

GParted is a free partition editor for graphically managing your disk partitions.

#yum install gparted

Gimp

Gimp is the most advanced Image Editor for Linux. This gimp has lot of useful features useful.

#yum install gimp yum install gimp-data-extras gimpfx-foundry gimp-lqr-plugin gimp-resynthesizer gnome-xcf-thumbnailer

Eclipse IDE

Eclipse is a multi-language Integrated development environment (IDE)

#yum install eclipse

Yum Extender : yumex

Yum Extender (yumex) is a GUI for the yum package manager. If you do not like installing everything from the terminal you can add a GUI installer.

Follow This Article to install Yum Extender (yumex) on Fedora 19

Skype Installation 

Dependencies:-

#yum install alsa-lib.i686 libXv.i686 libXScrnSaver.i686 qt.i686 qt-x11.i686 pulseaudio-libs.i686 pulseaudio-libs-glib2.i686 alsa-plugins-pulseaudio.i686 qtwebkit.i686 -y

#wget http://download.skype.com/linux/skype-4.2.0.11-fedora.i586.rpm

#yum localinstall skype-4.2.0.11-fedora.i586.rpm

Gnome Extension Installation

https://extensions.gnome.org/local/

Using "Gnome Link" create a account. List of extension.

Get Rid of Deleted Open Files

Get Rid of Deleted Open Files

Sharing a nice articles which I found on web. Hope it will be useful to you as well..

You might have this scenario; Logfiles deleted while the process is still running. That's annoying: On your Linux-Server the /var filesystem is nearly full. You remove a very large logfile that you don't need with the rm command:

rajat@root-centos## df -Ph /var

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/root-var  7.1G  7.0G  100M  99% /var

rajat@root-centos## ls -l /var/log/myapp/userlog

rajat@root-centos## rm /var/log/myapp/userlog

rajat@root-centos## df -Ph /var

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/root-var  7.1G  7.0G  100M  99% /var

But what's that? The filesystem is still full. With lsof you can see, that the logfile is still opened in write mode:

rajat@root-centos## lsof | grep var/log/myapp/userlog

myapp    25139      root   4w     REG      3,12       0    2101404 /var/log/myapp/userlog (deleted)

To actually free up the space you would have to stop the logging process. But since this might be a mission critical application this is not always an option. Is there any way to get rid of the file without stopping the logging process?

Find the deleted file's representation under /proc

Actually we cannot remove the file as long as the file is still in use by a process. But what we can do is: Getting the size down to 0. Thanks to Linux' enhanced /proc filesystem.

And that's how you do it:

First find the process that still uses the file (we already did that - see above):

rajat@root-centos## lsof | grep var/log/myapp/userlog

myapp    25139      root   4w     REG      3,12       0    2101404 /var/log/myapp/userlog (deleted)

lsof tells us that a process with PID=25139 has opened the file (with number 4) in write mode. See the bolded part of the lsof output.

Knowing the PID of the process and the file number we can visit its representation under /proc:

rajat@root-centos## cd /proc/25139/fd

rajat@root-centos#:/proc/25139/fd#  ls -l 4

lr-x------ 1 root root 64 2010-01-07 17:10 4 -> /var/log/myapp/userlog (deleted)

We can do almost everything with this file (called 4 here) what we can do with a real file: we can less it, copy it, and we can change its contents!

Free up the Space

As already said, we cannot remove the file, but what we can do is getting the size down to zero. And that's done as with every other file, e.g. if you use bash (or ksh) - what is most likely under Linux:

rajat@root-centos## > /proc/25139/fd/4

rajat@root-centos## df -Ph /var

Filesystem            Size  Used Avail Use% Mounted on

/dev/mapper/root-var  7.1G  4.9G  1.2G  69% /var

As we see there is again free space under /var, and the process is still running:

rajat@root-centos## lsof | grep var/log/myapp/userlog

myapp    25139      root   4w     REG      3,12       0        0  /var/log/myapp/userlog (deleted)

What more could be done...?

As said before you can work on this file as you work on real files. That means, you could even save this file and compress it before getting its size down to 0:

rajat@root-centos## cp /proc/25139/fd/4 /tmp/userlog

rajat@root-centos## gzip -9 /tmp/userlog

rajat@root-centos## mv /tmp/userlog.gz /var/log/myapp/userlog.1.gz

rajat@root-centos## > /proc/25139/fd/4

Final Remarks

This procedure helps you if you are in a pinch - but basically you should never remove such an open file, because you still have an issue here: The process still writes to this file - and the only way to see what it logs is to use the procedure to save the file as shown above.

So remember to bring the size down to 0 in the first place instead:

rajat@root-centos## > /var/log/myapp/userlog

This way the space in the filesystem is freed immediately - and you still see what your application is writing to this file.