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如果之前jetson nano的apt install正常，突然出现这个问题，那很可能是你用apt源服务器崩了，我用的是华为云源，出现了如题报错，改成了清华源，就没问题了，也可以改成中科大源。
保存备份：sudo cp /etc/apt/sources.list /etc/apt/sources.list.baksudo gedit /etc/apt/sources.list
‘清华源：’
deb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic main multiverse restricted universedeb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-security main multiverse restricted universedeb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main multiverse restricted universedeb http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-backports main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-security main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-updates main multiverse restricted universedeb-src http://mirrors.tuna.tsinghua.edu.cn/ubuntu-ports/ bionic-backports main multiverse restricted universe
中科大源：
deb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic main restricteddeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-updates main restricteddeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic universedeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-updates universedeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic multiversedeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-updates multiversedeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-backports main restricted universe multiversedeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-security main restricteddeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-security universedeb http://mirrors.ustc.edu.cn/ubuntu-ports/ bionic-security multiverse
修改好之后需要刷新一下 ：
sudo apt-get update
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