Kali/Post Install

Post-install procedure for Kali:

Update Aptitude

Make sure everything is up to date before you begin:

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

just makin sure:

$ sudo apt-get install -y vim screen tmux

and in case you wanna make a spreadsheet:

$ sudo apt-get install libreoffice

Fix SSH Keys

Fix SSH keys. First, install OpenSSH server:

$ apt-get install openssh-server

Update the SSH service to be at the default runlevel (i.e., to run on boot):

$ update-rc.d -f ssh remove
$ update-rc.d -f ssh defaults

Move the old SSH keys somewhere else:

$ cd /etc/ssh/
$ mkdir insecure_original_default_kali_keys
$ mv ssh_host_* insecure_original_default_kali_keys/

And finally, make new SSH keys for this machine.

$ dpkg-reconfigure openssh-server

If you want to enable root login at this point, do so:

$ vim /etc/ssh/sshd_config

add the line

PermitRootLogin yes

Set ssh to start running on all runlevels:

update-rc.d -f ssh enable 2 3 4 5

Add Non-Root User

List all users on system

Let's start by looking at what users are on the systeHOLY TOLEDO THAT IS A LOOOOOOT OF USERS

root@mars:~# cut -d: -f1 /etc/passwd
root
daemon
bin
sys
sync
games
man
lp
mail
news
uucp
proxy
www-data
backup
list
irc
gnats
nobody
libuuid
mysql
messagebus
colord
usbmux
miredo
ntp
Debian-exim
arpwatch
avahi
beef-xss
dradis
pulse
speech-dispatcher
haldaemon
sshd
snmp
iodine
postgres
redsocks
stunnel4
statd
sslh
Debian-gdm
rtkit
saned
dnsmasq

THAT IS A LOT OF USERS

List all users logged in

But only one of those many, many users is logged in:

root@mars:~# w
 23:32:24 up 13:26,  2 users,  load average: 0.00, 0.01, 0.05
USER     TTY      FROM             LOGIN@   IDLE   JCPU   PCPU WHAT
root     pts/0    10.0.0.120       23:18    0.00s  0.16s  0.00s w

Add new user

Now we can add our new user:

root@mars:~# useradd -m charles

the m flag creates a home user. Check out our user's user id and group id:

root@mars:~# id charles
uid=1000(charles) gid=1001(charles) groups=1001(charles)

Change user password:

root@mars:~# passwd charles

Add the user to the sudoers group:

root@mars:~# usermod -a -G sudo charles

Specify shell:

root@mars:~# chsh -s /bin/bash charles

Fix Everything Else

See Kali/Fixes for fixing everything else