command -v \vim >/dev/null 2>&1 || { echo >&2 "WARNING: vim isn't installed You should install it, because it's used as text editor.!"; }
command -v \most >/dev/null 2>&1 || { echo >&2 "WARNING: most isn't installed! You should install it, because it's used as pager."; }
command -v \htop >/dev/null 2>&1 || { echo >&2 "WARNING: htop isn't installed! You should install it, because it's used as top."; }
unalias youtube-dl
command -v \youtube-dl >/dev/null 2>&1 || { echo >&2 "WARNING: youtube-dl isn't installed! You should install it, because it's used as youtube-dl. What am I writing? Install it for fun"; } # Expect this to be removed in near future.
alias youtube-dl="youtube-dl -t"
command -v \nping >/dev/null 2>&1 || { echo >&2 "WARNING: nping isn't installed! You should install it, because it's used as ping."; }
command -v \aptitude >/dev/null 2>&1 || { echo >&2 "WARNING: aptitude isn't installed! You should install it, because it's used as apt-get"; }
command -v \gpg2 >/dev/null 2>&1 || { echo >&2 "WARNING: gnupg2 isn't installed! You should install it, because it's used as gpg."; }
command -v \lynx >/dev/null 2>&1 || { echo >&2 "WARNING: lynx isn't installed! You should install it, because it's used by many functions."; }

if [ ! -f /usr/share/doc/popularity-contest/copyright ]
then
    echo "You might want to install popularity-contest. See http://popcon.debian.org/"
fi

## To disable warnings, add the following (UNCOMMENTED!) to ~/.custom

#if [ -f ~/.warnings ]; then
#    rm ~/.warnings
#    fi