zcat:tldr:8ab65

The zcat -l ${file-txt-gz} command is used to display the content of a compressed file in a terminal without decompressing it.

Here's an explanation of each part of the command:

• zcat is a command-line utility that is used to read compressed files. It is similar to the cat command, but specifically designed for compressed files.
• -l is an option specific to zcat that lists the contents of the compressed file. With this option, zcat will display the names of the files contained within the compressed file, rather than extracting their content.
• ${file-txt-gz} is a shell variable or placeholder that represents the name of the compressed file. The actual name of the file should be substituted here before executing the command.

Overall, when you run this command with the appropriate file name substituted, it will display a list of files contained within the compressed file without decompressing them.