Queries information about distribution vendors
dpkg-vendor [option...] command
dpkg-vendor is a tool to query information about vendors listed in /etc/dpkg/origins. /etc/dpkg/origins/default contains information about the current vendor.
--is vendor
Exits with 0 if the current vendor is vendor. Otherwise exits with non-zero.
--derives-from vendor
Exits with 0 if the current vendor distribution is a derivative of vendor, otherwise exits with non-zero. It uses the Parent field to browse all ancestors of the current vendor.
--query field
Print on standard output the value of the vendor-specific field for the current vendor.
--help
Show the usage message and exit.
--version
Show the version and exit.
--vendor vendor
Assumes the current vendor is vendor instead of discovering it with the DEB_VENDOR environment variable or /etc/dpkg/origins/default.
DEB_VENDOR
This setting defines the current vendor. If not set, it will discover the current vendor by reading /etc/dpkg/origins/default.