alien:tldr:04622

The command 'sudo alien --to-deb --install ${filename}' is used to install a package in a Debian-based Linux system that has been converted from a different package format using the 'alien' utility.

Let's break down the command:

• 'sudo' is a command that allows the user to run a command with administrative (root) privileges.
• 'alien' is a utility program that can convert packages between different package formats such as .deb, .rpm, .tgz, etc.
• '--to-deb' is an option for the 'alien' command that specifies the desired output format as a Debian package (.deb).
• '--install' is another option for the 'alien' command that instructs it to install the converted package after the conversion process is complete.
• '${filename}' specifies the name of the file that you want to convert and install. The use of '${filename}' suggests that it's a variable which needs to be replaced with the actual filename when running the command. For example, if the file is 'package.rpm', you would replace '${filename}' with 'package.rpm' in the command.

The command when executed with appropriate values would convert the specified package to a .deb format and then install it on the system using administrative privileges.