20 things to do after installing Kali Linux 1.x

Useful utilities and Software’s

6. Install Java

Go to the following link and download jdk7. At the time of writing this guide the jdk version was jdk-7u45-linux-x64. Note that I’m using x64 which is 64-bit. 32-bit users should choose their versions accordingly. Not that tough really!

Following is what I’ve used. JDK-7u45-Linux-x64 At the time of writing this guide the available version was jdk-7u45-linux-x64.tar.gz Download and save the file in /root directory.

tar -xzvf /root/jdk-7u45-linux-x64.tar.gz
mv jdk1.7.0_45 /opt
cd /opt/jdk1.7.0_45

This step registers the downloaded version of Java as an alternative, and switches it to be used as the default:

update-alternatives --install /usr/bin/java java /opt/jdk1.7.0_45/bin/java 1
update-alternatives --install /usr/bin/javac javac /opt/jdk1.7.0_45/bin/javac 1
update-alternatives --install /usr/lib/mozilla/plugins/libjavaplugin.so mozilla-javaplugin.so /opt/jdk1.7.0_45/jre/lib/amd64/libnpjp2.so 1
update-alternatives --set java /opt/jdk1.7.0_45/bin/java
update-alternatives --set javac /opt/jdk1.7.0_45/bin/javac
update-alternatives --set mozilla-javaplugin.so /opt/jdk1.7.0_45/jre/lib/amd64/libnpjp2.so

Follow installing Java JDK in Kali Linux post for step by step instructions and testing options.

7. Install Flash

Just DON’T install Flash. Explanations coming soon.

This is fairly simple and easy and should work from most people out there: In the terminal:

apt-get install flashplugin-nonfree

and then type in:

update-flashplugin-nonfree --install

That’s it. You flash should be working as expected.

Follow installing Flash in Kali Linux post for step by step instructions and testing options. This post also includes manual Flash installation procedures for those whose installation might fail with above mentioned process.

8. Install File Roller – Archive Manager

Kali Linux lacks a proper GUI archive manager. Install it Archive Manager (File Roller) using the following command:

apt-get install unrar unace rar unrar p7zip zip unzip p7zip-full p7zip-rar file-roller -y

You can now find Archive Manager in Applications > Accessories > Archive Manager.

9. Add a standard user

Kali Linux got only root user by default. While most applications require root access, it’s always a good idea to add a second user. Open terminal and type following to create new user (replace user1 with your desired user name)

useradd -m user1

(Note: -m means create home directory which is usually /home/username)

Now set password for this user

passwd user1

Enter desired password twice Add user to sudo group (to allow user to install software, allow printing, use privileged mode etc.)

usermod -a -G sudo user1

(Note: -a means append or add and –G mean to specified group/groups) Change default shell of previously created user to bash

chsh -s /bin/bash user1

To learn more, follow this excellent and detailed post on adding remove user (standard user/non-root) in Kali Linux. This post explains how to add a user with all user directories already in place (thereby avoiding “Could not update .ICEauthority var/lib/gdm3/.ICEauthority” or any error containing .ICEauthority or permission in general.

10. Add add-apt-repository

Debian allows users to add and use PPA repositories by an application named add-apt-repository however, Kali Linux didn’t include this in their default package list. With Kali, because this is a special purpose application and certain modifications were made to make it work for what it does best (Penetration Test). To enable PPA Repository via add-apt-repository application, follow the steps below: First install Python Software properties package.

apt-get install python-software-properties

Next install apt-file

apt-get install apt-file

Update apt-file.

apt-file update

This takes a while, so in case your apt-file update is SLOW, you might want to try and fix that as well. (Note that I got repo.kali.org in my /etc/apt/sources.list file instead of http.kali.org.) Once apt-file update is complete, you should be able to search for it.

apt-file search add-apt-repository

Your output should look similar to this:

python-software-properties: /usr/bin/add-apt-repository
python-software-properties: /usr/share/man/man1/add-apt-repository.1.gz

The default add-apt-repository application located in (/usr/bin/add-apt-repository) works for Debian. So if you’re using Kali, chances are it won’t work. There’s a nice fix for that which I will add at the bottom of this post, (try them on VirtualBox if you feel like). But I found we can just mimic Ubuntu Oneiric to make add-apt-repository work.

cd /usr/sbin
vi add-apt-repository

Add the following code and save the file.

#!/bin/bash
if [ $# -eq 1 ]
NM=`uname -a && date`
NAME=`echo $NM | md5sum | cut -f1 -d" "`
then
  ppa_name=`echo "$1" | cut -d":" -f2 -s`
  if [ -z "$ppa_name" ]
  then
    echo "PPA name not found"
    echo "Utility to add PPA repositories in your debian machine"
    echo "$0 ppa:user/ppa-name"
  else
    echo "$ppa_name"
    echo "deb http://ppa.launchpad.net/$ppa_name/ubuntu oneiric main " >> /etc/apt/sources.list
    apt-get update >> /dev/null 2> /tmp/${NAME}_apt_add_key.txt
    key=`cat /tmp/${NAME}_apt_add_key.txt | cut -d":" -f6 | cut -d" " -f3`
    apt-key adv --keyserver keyserver.ubuntu.com --recv-keys $key
    rm -rf /tmp/${NAME}_apt_add_key.txt
  fi
else
  echo "Utility to add PPA repositories in your debian machine"
  echo "$0 ppa:user/ppa-name"
fi

Note: In this line echo "deb http://ppa.launchpad.net/$ppa_name/ubuntu oneiric main" >> /etc/apt/sources.list I’ve used Oneiric. You can try to use Lucid, Raring or Saucy as per your choice. Now chmod and chown the file.

chmod o+x /usr/sbin/add-apt-repository 
chown root:root /usr/sbin/add-apt-repository

Now that we added the correct code, we can use add-apt-repository to add a PPA repository. I tried the following to add themes and custom icons in Kali Linux.

/usr/sbin/add-apt-repository ppa:noobslab/themes
/usr/sbin/add-apt-repository ppa:alecive/antigone

I’ve removed all screenshots from this post, but if you want see read and understand how it all works, I suggest reading the details post on  adding PPA repository add-apt-repository in Kali Linux.