To unpack or uncompress a .gz file (also known as a "gzip" file) on a Linux or Unix system, you can use the gzip command.
The gzip command is a utility that is used to compress and decompress files. It is commonly used to reduce the size of files for faster transmission over networks or to save storage space on disk.
To uncompress a .gz file, you can use the following syntax:
gzip -d file.gz
This will uncompress the file.gz file and create a new file with the same name as the original file, but with the .gz extension removed.
The -d option tells gzip to decompress the file.
If you want to keep the original .gz file and create a new file with a different name, you can use the -c option to write the uncompressed data to standard output and redirect it to a new file.
For example, to uncompress the file.gz file and create a new file called file, you can use the following command:
gzip -dc file.gz > file
This will uncompress the file.gz file and create a new file file in the current directory.
For more information about the gzip command and its options, you can consult the documentation for your specific Linux or Unix system.