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alien:tldr:40a48
The 'sudo alien --to-tgz ${filename}' command is used to convert a package of one file type to another file type while also compressing it.
Here's a breakdown of the command and its components:
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'sudo': It is used to execute the following command with administrative privileges. The 'sudo' command ensures that the 'alien' command is run with the necessary permissions.
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'alien': It is a command-line tool primarily used in Linux systems to convert packages between different packaging formats, such as from RPM to DEB or vice versa. The actual conversion and compression happen through the 'alien' command.
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'--to-tgz': It is an option provided to the 'alien' command, specifying the desired output format. In this case, '--to-tgz' indicates that the package should be converted and compressed into the ".tgz" format, also known as Tarball Gzipped, which combines the files into a single archive and applies Gzip compression.
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'${filename}': It is a placeholder for the actual filename or path of the package file you want to convert. To use this command, you need to replace '${filename}' with the name of the package file you want to convert, including its extension.
Overall, this command converts a package file to the ".tgz" format while using the 'sudo' command for administrative privileges.