ruler() { for s in '....^....|' '1234567890'; do w=${#s}; str=$( for (( i=1; $i<=$((($COLUMNS + $w) / $w )) ; i=$i+1 )); do echo -n $s; done ); str=$(echo $str | cut -c -$COLUMNS) ; echo $str; done; }

mktruckdir() {
    USER=$(whoami)
    sudo mkdir ${1}
    sudo chown ${USER}:${USER} ${1}
}

randmac() {
    dd if=/dev/urandom bs=4096 count=1 2>/dev/null | sha1sum|sed 's/^\(..\)\(..\)\(..\)\(..\)\(..\).*$/02:\1:\2:\3:\4:\5/'
}

randmacxen() {
    dd if=/dev/urandom bs=4096 count=1 2>/dev/null | sha1sum| sed 's/^\(..\)\(..\)\(..\).*$/00:16:3E:\1:\2:\3'/
}