gzip:tldr:43878

The command "gzip -d ${file-ext}.gz" is used to decompress a file that has been compressed using the gzip compression algorithm.

Here's a breakdown of the command:

• "gzip" is the command used to compress or decompress files using the gzip algorithm.
• "-d" is an option used with the gzip command to indicate that the decompression operation should be performed.
• "${file-ext}.gz" is a placeholder for the actual name of the file you want to decompress. The "${file-ext}" represents the file name without the ".gz" extension. So, when this command is executed, it will decompress a file named "${file-ext}.gz".

For example, if you want to decompress a file called "file.txt.gz", you would replace "${file-ext}" with "file.txt", and the command would become "gzip -d file.txt.gz". This would decompress the "file.txt.gz" file, resulting in a file named "file.txt".