diffstat:tldr:c495d
The command "diff" is used to compare the content of two files line by line. "${file1}" and "${file2}" are placeholders for the actual file names or paths that you need to provide.
The vertical bar "|" is a pipe symbol, which is used to redirect the output of the "diff" command to another command.
The "diffstat" command is a tool that takes the output from "diff" and displays a summary of the differences in a more compact and readable format. It provides statistics on the number of added, deleted, and modified lines in the compared files, as well as the percentage of change.
So, when you run the given command, it compares the content of "${file1}" and "${file2}" using "diff", then pipes the output to "diffstat" for a concise summary of the differences between the two files.