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pr:tldr:141cf
The command you provided is using the pr
command in Unix-like systems. Here is an explanation of each component:
-
pr
: Thepr
command is used to prepare files for printing or viewing. It paginates the input into multiple columns and adds headers, footers, line numbers, and other formatting options. -
-n
: This option is used to include line numbers in the output. Each line will be prefixed with a line number. -
-D "${format}"
: This option is used to specify the format of the headers and footers. The${format}
variable should contain the format string you want to use. For example, if${format}
is set to%F %T
, the header and footer will display the current date and time. -
${file1} ${file2} ${file3}
: These are the files that you want to process with thepr
command. Replace${file1}
,${file2}
, and${file3}
with the actual file names or paths you want to include.
Overall, this command will format the contents of ${file1}
, ${file2}
, and ${file3}
with line numbers and the specified header/footer format, and display the result on the screen.