.\" dpkg manual page - deb-preinst(5)
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.\" Copyright © 2016 Guillem Jover <guillem@debian.org>
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.TH deb\-preinst 5 "2019-06-03" "1.19.7" "dpkg suite"
.nh
.SH NAME
deb\-preinst \- package pre-installation maintainer script
.
.SH SYNOPSIS
preinst
.
.SH DESCRIPTION
A package can perform several pre-installation actions via maintainer
scripts, by including an executable \fIpreinst\fP file in its control
archive (i.e. \fIDEBIAN/preinst\fP during package creation).
.PP
The script can be called in the following ways:
.TP
\fInew-preinst\fP \fBinstall\fP
Before the package is installed.
.TP
\fInew-preinst\fP \fBinstall\fP \fIold-version new-version\fP
Before removed package is upgraded.
.TP
\fInew-preinst\fP \fBupgrade\fP \fIold-version new-version\fP
Before the package is upgraded.
.TP
\fIold-preinst\fP \fBabort-upgrade\fP \fInew-version\fP
If \fIpostrm\fP fails during upgrade or fails on failed upgrade.
.
.SH SEE ALSO
.BR dpkg (1).