Hello to all.
I got this error while I run the update command.
Fetched 466 kB in 9s (48.9 kB/s)
W: GPG error: http://www.bchemnet.com debian Release: The following signatures were invalid: BADSIG C95104E509BAC46D Samung Unified Linux Driver Repository
W: Failed to fetch copy:/var/lib/apt/lists/partial/liveusb.info_multisystem_depot_dists_all_main_i18n _Translation-en%5fUS Encountered a section with no Package: header
W: Failed to fetch gzip:/var/lib/apt/lists/partial/liveusb.info_multisystem_depot_dists_all_main_i18n _Translation-en Encountered a section with no Package: header
W: Failed to fetch gzip:/var/lib/apt/lists/partial/extras.ubuntu.com_ubuntu_dists_precise_main_i18n_T ranslation-en Encountered a section with no Package: header
E: Some index files failed to download. They have been ignored, or old ones used instead.
How can I resolve it?