preinst is in dropbear-initramfs 2017.75-3build1.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
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 | #! /bin/sh
set -e
# XXX backward compatibility; remove once Stretch is the current stable
if [ "$1" = upgrade -o "$1" = install ] && [ $# -ge 2 ] && \
dpkg --compare-versions "$2" le '2016.72-1'; then
rm -f /etc/initramfs-tools/conf-hooks.d/dropbear
for x in etc/dropbear/dropbear_dss_host_key \
etc/dropbear/dropbear_rsa_host_key \
etc/dropbear/dropbear_ecdsa_host_key \
root/.ssh/authorized_keys \
root/.ssh/id_dsa.pub \
root/.ssh/id_rsa.pub \
root/.ssh/id_ecdsa.pub; do
[ -f "/etc/initramfs-tools/$x" ] || continue
[ -d /etc/dropbear-initramfs ] || mkdir /etc/dropbear-initramfs
mv -n "/etc/initramfs-tools/$x" /etc/dropbear-initramfs
done
fi
# Automatically added by dh_installdeb/10.10.8ubuntu1
dpkg-maintscript-helper symlink_to_dir /usr/share/doc/dropbear-initramfs dropbear-bin 2016.72-1 -- "$@"
# End automatically added section
exit 0
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