Shell script to install the Zero Hosts hosts file to block ads.

AndroidNoAds.sh

# It should go without saying that this requires root. This can be run either on a host PC with 
#   the Android Debug Bridge (adb), or on the device itself in a terminal emulator (such as Termux).

# More information on the Zero Hosts file: http://someonewhocares.org/hosts/zero/

# Uncomment if you're using adb
# adb shell
su                                          # switch to root
cd /storage/emulated/0                      # change directory to the internal storage
wget http://someonewhocares.org/hosts/hosts # download the zero hosts file
mount -o rw,remount /system                 # mount /system as read/write
cat hosts >> /system/etc/hosts              # append the zero hosts file to the system hosts file
rm hosts                                    # delete the downloaded file
mount -o ro,remount /system                 # mount /system as read only
exit                                        # exit root
exit                                        # exit terminal
# Uncomment if you're using adb
# exit                                      # exit adb