APT sources

Add deb-src to get package sources

Lang: bash 
cat <<EOF >> /etc/apt/sources.list
deb-src http://http.kali.org/kali/ kali-rolling main contrib non-free
EOF

Add latest debian distribution suites i.e. unstable & experimental

Lang: bash 
cat <<EOF >> /etc/apt/sources.list.d/debian.list
deb http://deb.debian.org/debian/ unstable main contrib non-free
deb-src http://deb.debian.org/debian/ unstable main contrib non-free

deb http://deb.debian.org/debian/ experimental main
deb-src http://deb.debian.org/debian/ experimental main
EOF

Add latest kali distribution suites i.e. kali-bleeding-edge

Lang: bash 
cat <<EOF >> /etc/apt/sources.list.d/kali.list
deb http://http.kali.org/kali/ kali-bleeding-edge main contrib non-free
deb-src http://http.kali.org/kali/ kali-bleeding-edge main contrib non-free
EOF

Use fast APT package mirrors

Disable default APT sources

To avoid getting slow speed APT package servers.

Lang: bash 
sed -i 's/^deb/#deb/' \
	/etc/apt/sources.list \
	/etc/apt/sources.list.d/debian.list \
	/etc/apt/sources.list.d/kali.list

Use a fast APT sources mirror

APT sources mirrors such as mirrors.ocf.berkeley.edu are very fast and reliable.

kali-rolling mirror

Lang: bash 
cat <<EOF >> /etc/apt/sources.list
deb http://mirrors.ocf.berkeley.edu/kali/ kali-rolling main contrib non-free
deb-src http://mirrors.ocf.berkeley.edu/kali/ kali-rolling main contrib non-free
EOF

debian unstable, experimental mirror

Lang: bash 
cat <<EOF >> /etc/apt/sources.list.d/debian.list
deb http://mirrors.ocf.berkeley.edu/debian/ unstable main contrib non-free
deb-src http://mirrors.ocf.berkeley.edu/debian/ unstable main contrib non-free

deb http://mirrors.ocf.berkeley.edu/debian/ experimental main
deb-src http://mirrors.ocf.berkeley.edu/debian/ experimental main
EOF

kali-bleeding-edge mirror

Lang: bash 
cat <<EOF >> /etc/apt/sources.list.d/kali.list
deb http://mirrors.ocf.berkeley.edu/kali/ kali-bleeding-edge main contrib non-free
deb-src http://mirrors.ocf.berkeley.edu/kali/ kali-bleeding-edge main contrib non-free
EOF

Sometimes the mirror sites may not be accessible due to packages synchronizing in this case disable the mirror sites and enable use default APT sources.

Set APT default distribution

APT always fetches the latest version of all the packages in sources. Due to this we may change the base system to debian-unstable or debian-experimental which is not suitable for regular system use. For this reason we set the stable suite i.e. kalling-rolling as the default distribution and fetch latest updates for individual packages.

Lang: bash 
echo 'APT::Default-Release "kali-rolling";' >/etc/apt/apt.conf.d/99local

Reduce apt upgrade prompts

When updating software packages with apt it prompts to whether to use existing configuration files for a package or overwrite them with latest ones.

In practice the configuration files of package must always be the latest ones so we set this as default to prevent apt prompting for confirmation.

Lang: bash 
# * `–force-confdef` let apt choose the conf file if old and new are same.
# * `--force-confold` let apt keep the existing conf if the old and new are
#   different.
cat <<EOF >>/etc/apt/apt.conf.d/99local
DPkg::options { "--force-confdef"; "--force-confold"; }
EOF

Setup fonts, language & timezone

Lang: bash 
# install all available free indian fonts
apt install fonts-indic

# set locale to Indian
update-locale LANG=en_IN.UTF-8 LANGUAGE

# set time to Indian timezone
timedatectl set-timezone Asia/Kolkata

Install useful tools

Lang: bash 
# Install useful cli tools
apt install neofetch htop xclip dict m4 git tig expect batcat ripgrep fd-find

# download or install flat-remix themes and icons
apt install flat-remix flat-remix-gtk

References