update error 썸네일형 리스트형 우분투 업데이트시 PUBKEY 에러 W: GPG error: http://downloads-distro.mongodb.org dist Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 9ECBEC467F0CEB10 W: GPG error: http://mirrors.advancedhosters.com trusty Release: The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32 W: GPG error: .. 더보기 이전 1 다음