/etc/cron.daily/man-db:
chown: `man': invalid user
start-stop-daemon: user `man' not found

run-parts: /etc/cron.daily/man-db exited with return code 2

#!/bin/sh
#
# man-db cron daily

set -e

if ! [ -d /var/cache/man ]; then
    # Recover from deletion, per FHS.
    mkdir -p /var/cache/man
    chown man:root /var/cache/man
    chmod 2755 /var/cache/man
fi

# expunge old catman pages which have not been read in a week
if [ -d /var/cache/man ]; then
  cd /
  if ! dpkg-statoverride --list /var/cache/man >/dev/null 2>&1; then
    chown -R man /var/cache/man || true		# just in case
  fi
  start-stop-daemon --start --pidfile /dev/null --startas /bin/sh \
	--oknodo --chuid man -- -c \
	"find /var/cache/man -type f -name '*.gz' -atime +6 -print0 | \
	 xargs -r0 rm -f"
fi

# regenerate man database
if [ -x /usr/bin/mandb ]; then
    # --pidfile /dev/null so it always starts; mandb isn't really a daemon,
    # but we want to start it like one.
    start-stop-daemon --start --pidfile /dev/null \
		      --startas /usr/bin/mandb --oknodo --chuid man \
		      -- --no-purge --quiet
fi

exit 0

grep man /etc/passwd
man:x:13:62:Manual pages viewer:/var/cache/man:/bin/bash

grep man /etc/group
man:x:62:

# grep man /etc/passwd
# grep man /etc/group

dpkg-reconfigure -phigh man-db

# useradd -d /var/cache/man -s /bin/sh man