That command is copying an ar archive from
Here's an explanation:
echo -e "..." prints on standard output the string
\n is replaced with a new line.
| (pipe) operator sends the output from
ar is an archive utility (similar to
zip). The option
-M is used to read commands from the standard input.
sudo is used to run
ar as root.
That command is equivalent to running
sudo ar -M and manually typing these lines:
create (unsurprising) creates a new archive.
addlib copies all the contents of an archive to the newly created archive.
end are self-explanatory.
If you want to learn more, check out the documentation for AR.