zcmp:tldr:c35f7

The command "zcmp ${filename1-gz} ${filename2-gz}" is used to compare the contents of two compressed files using the "gzip" utility. Here's a breakdown of each component:

• "zcmp": This is the command to compare two gzip-compressed files.
• "${filename1-gz}": This is the first filename variable. It specifies the name or path of the first compressed file you want to compare. The "-gz" extension is commonly used to indicate gzip-compressed files, but it may vary depending on the actual file extension.
• "${filename2-gz}": This is the second filename variable. It specifies the name or path of the second compressed file you want to compare. Like the first filename, the "-gz" extension indicates gzip-compressed files.

In summary, this command compares the contents of two gzip-compressed files specified by ${filename1-gz} and ${filename2-gz} to check if they are identical or different.