Package: postgis

"postgis" package binaries on CentOS:

/usr/bin/pgsql2shp /usr/bin/shp2pgsql /usr/bin/shp2pgsql-gui

You may install this package on CentOS with yum install postgis

"postgis" package binaries on Debian:

/usr/bin/pgsql2shp /usr/bin/raster2pgsql /usr/bin/shp2pgsql /usr/bin/shp2pgsql-gui

You may install this package on Debian with apt-get install postgis