wc:tldr:fa727

The command "wc --lines ${filename}" is used to count the number of lines in a file.

Here's a breakdown of the command:

• "wc" stands for word count, a Linux command that displays the number of lines, words, and characters in a file.
• "--lines" is an option or flag used with the "wc" command to specify that you only want to count the number of lines.
• "${filename}" is a placeholder that represents the name of the file you want to count the lines for. You need to replace "${filename}" with the actual name of the file.

So, when you execute the command "wc --lines ${filename}", it will display the number of lines present in the specified file.