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The dpkg environment settings are configured in /etc/dpkg/dpkg.cfg file.

Installing packages

Install this package (no dependencies)

# dpkg -i flashplugin.deb

List all installed packages

# dpkg -l 

List this installed package && list all installed packages

# dpkg -l nginx
# dpkg -l

Install recursively all packages inside /packages/ directory

# dpkg -R --install /packages/

Unpack the package, but won’t install or configure it

# dpkg --unpack package.deb

It will configure the unpacked package

# dpkg --configure unpacked_package.deb

Removing packages

Remove this package, leave its configuration files (needs only package name)

# dpkg -r nginx

Remove this package, and its configuration files (needs only package name)

# dpkg -P nginx

Query packages

View the contents of the package

# dpkg -c nginx.deb

See status of the package. Is installed or not, and other details about it.

# dpkg -s nginx

List all files installed with nginx

# dpkg -L nginx