Kali linux apt-get update 报错

今天进行apt-get install时发现不能下载软件，并在执行apt-get update更新国内源出现如下错误：

W: Failed to fetchhttp://http.kali.org/kali/dists/kali-rolling/InRelease  The following signatures were invalid:EXPKEYSIG ED444FF07D8D0BF6 Kali Linux Repository

百度一下发现是证书过期了，按照之前几个方法安装证书出现错误，最后按照下面方法安装新的证书才解决了问题：

安装证书：

wget https://http.kali.org/kali/pool/main/k/kali-archive-keyring/kali-archive-keyring_2018.1_all.deb

apt install ./kali-archive-keyring_2018.1_all.deb

安装完证书后再执行apt-get update和apt-get upgrade即可