Remove rsyslog and its log files from Debian systems not requiring rsyslog compatibility

remove-rsyslog.sh

#!/usr/bin/env bash
#
# remove-rsyslog -- remove rsyslog and its log files
#
# As of Debian 10, rsyslog exists mainly for backwards compatibility reasons,
# and it is not required for the base system to operate. If you do not require
# this backwards compatibility, you can use this script to remove rsyslog and
# all of its redundant log files from your system.
#
systemctl disable --now rsyslog.service
apt autoremove --purge --yes rsyslog

cd /var/log
kb_before="$(du -s . | awk '{print $1}')"

echo deleting logs from rsyslogd...
find /var/log \
	-maxdepth 1 \
	\( \
	-name 'auth.log*' -o \
	-name 'daemon.log*' -o \
	-name 'debug*' -o \
	-name 'kern.log*' -o \
	-name 'mail.err*' -o \
	-name 'mail.info*' -o \
	-name 'mail.log*' -o \
	-name 'mail.warn*' -o \
	-name 'messages*' -o \
	-name 'syslog*' -o \
	-name 'user*' \
	\) \
	-print \
	-delete

kb_after="$(du -s . | awk '{print $1}')"
kb_diff="$(( $kb_before - $kb_after ))"

printf 'before:\t%dk\nafter:\t%dk\ndiff:\t%dk\n' \
	"$kb_before" "$kb_after" "$kb_diff"