postrm is in plymouth-theme-edubuntu 15.12.1.
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 | #!/bin/sh
set -e
case "$1" in
remove)
# Disable plymouth theme
update-alternatives \
--remove default.plymouth /usr/share/plymouth/themes/edubuntu-logo/edubuntu-logo.plymouth
update-alternatives \
--remove text.plymouth /usr/share/plymouth/themes/edubuntu-text/edubuntu-text.plymouth
if which update-initramfs >/dev/null 2>&1
then
update-initramfs -u
fi
;;
esac
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