/usr/sbin/update-cracklib is in cracklib-runtime 2.9.2-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 | #!/bin/sh
# update-cracklib - Regenerate cracklib word lists
#
# This script is based on the original cron job written by Jean Pierre
# LeJacq <jplejacq@quoininc.com>.
set -e
umask 0022
if [ -r "/etc/cracklib/cracklib.conf" ]
then
    . /etc/cracklib/cracklib.conf
else
    echo Error: cannot read configuration file /etc/cracklib/cracklib.conf
    exit 1
fi
if [ ! -d /var/cache/cracklib/ ]; then
    install -d -m 755 /var/cache/cracklib/
fi
if [ -n "${cracklib_dictpath_src}"  -a  -n "${cracklib_dictpath}" ]
then
    export LC_COLLATE=C
    processed=0
    for i in ${cracklib_dictpath_src}
    do
        if ! [ -e /var/cache/cracklib/src-dicts ] \
            || ! grep -q "$i" /var/cache/cracklib/src-dicts \
            || ! [ -e "${cracklib_dictpath}.pwd" ] \
            || [ "$i" -nt "${cracklib_dictpath}.pwd" ]
        then
            if [ $processed = 0 ]
            then
                /usr/sbin/cracklib-format ${cracklib_dictpath_src} | \
                /usr/sbin/cracklib-packer
                processed=1
                echo "${cracklib_dictpath_src}" > \
                    /var/cache/cracklib/src-dicts
            fi
        fi
    done
fi
exit 0
 |