postinst is in libblas-dev 3.6.0-2ubuntu2.
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 | #! /bin/sh
set -e
update-alternatives --install /usr/lib/libblas.so libblas.so /usr/lib/libblas/libblas.so 10 \
--slave /usr/lib/libblas.a libblas.a /usr/lib/libblas/libblas.a \
--slave /usr/lib/pkgconfig/blas.pc blas.pc /usr/lib/pkgconfig/blas-netlib.pc
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
exit 0
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