You @strong{have to} check downloaded archives integrity and verify
their signature to be sure that you have got trusted, untampered
software. For integrity and authentication of downloaded binaries
-@url{https://www.gnupg.org/, The GNU Privacy Guard} is used. You must
+@url{https://www.gnupg.org/, GNU Privacy Guard} is used. You must
download signature (@file{.sig}) provided with the tarball.
For the very first time you need to import signing public key. It is