kali系统apt-get报错

apt-get update 后报错 Reading package lists... Done

此时需要更新源  在etc/apt/目录下找到source.list文件 打开

加入新的源 

deb http://cn.archive.ubuntu.com/ubuntu/ trusty main restricted universe multiverse.
deb http://cn.archive.ubuntu.com/ubuntu/ trusty-security main restricted universe multiverse.
deb http://cn.archive.ubuntu.com/ubuntu/ trusty-updates main restricted universe multiverse.

deb http://cn.archive.ubuntu.com/ubuntu/ trusty-backports main restricted universe multiverse.

重新执行apt-get update

Err:3 http://cn.archive.ubuntu.com/ubuntu trusty-security InRelease
  The following signatures couldn't be verified because the public key is not available: NO_PUBKEY 40976EAF437D05B5 NO_PUBKEY 3B4FE6ACC0B21F32 

签名错误 

执行sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys 3B4FE6ACC0B21F32之后再更新就可以了 

注意--recv-keys 后面的位报错信息中NO_PUBKEY后面的key