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dockerfile 换源FROM ubuntu:20.04ARG DEBIAN_FRONTEND=noninteractiveUSER rootRUN mv /etc/apt/sources.list /etc/apt/sources_backup.list && \echo "deb http://mirrors.ustc.edu.cn/ubuntu/ focal main restricted " >> /etc/apt/sources.list &&am

docker stop container id 失败显示root@# docker stop onos1 Error response from daemon: cannot stop container: onos1: permission denied解决方案 输入命令aa-remove-unknownaa-remove-unknown将清点/etc/apparmor.d/中的所有配置文件，将该列表与当前加载到内核中的配置文件进行比较，然后删除/etc/apparmor.d/中未找到

ubuntu 20.04配置ssh远程服务1、开启服务/etc/init.d/ssh start查看ssh服务状态 sudo service ssh status正常是active（running）2、修改ssh登陆配置sudo vim /etc/ssh/sshd_config修改以下配置：33 #LoginGraceTime 2m34 #PermitRootLogin prohibit-password35 #StrictModes yes36 #MaxAuthTries 63