First things to do in debian

debian_basic_packages

apt-get update && apt-get upgrade
dpkg --add-architecture i386 && apt-get update
apt-get install nano wget zip unzip bzip2 linux-kernel-headers tmux ca-certificates curl locales

# sources in /etc/apt/sources.list

debian_hostname

/etc/hostname
/etc/hosts
shutdown -r now

debian_language_and_accents

# Allows for language options
apt-get install locales
# Know current locales:
locales
# Reconfigure locales
dpkg-reconfigure locales
# Use en_US.UTF8 or en_GB.UTF8. Other ones are useless.

debian_motd

nano /etc/motd

debian_network

nano /etc/network/interfaces
nano /etc/resolv.conf

debian_root_coloring

# As root:

cd  /root
nano .bashrc

# Uncomment these lines
export LS_OPTIONS=’–color=auto’
eval “`dircolors`”
alias ls=’ls $LS_OPTIONS’
alias ll=’ls $LS_OPTIONS -l’
alias l=’ls $LS_OPTIONS -lA’

# Run .bashrc
. .bashrc

debian_security

# Hide process from a user to another

mount -o remount,rw,hidepid=2 /proc
nano /etc/fstab : proc /proc proc defaults,hidepid=2 0 0

# Create a new user and disallow root login
adduser whateveryouwant

nano /etc/ssh/sshd_config
Port =/= 22
PermitRootLogin no
PrintLastLog yes

debian_timzeone

# Change your timezone
dpkg-reconfigure tzdata