# 查看信息
查看完整整的 Ubuntu 系统信息：cat /proc/version
查看列表型系统版本信息：lsb_release -a
# 换源
Ubuntu 系统中，软件源文件地址为：/etc/apt/sources.list
替换文件内容
#添加阿里源 | |
deb http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse | |
deb-src http://mirrors.aliyun.com/ubuntu/ focal main restricted universe multiverse | |
deb http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse | |
deb-src http://mirrors.aliyun.com/ubuntu/ focal-security main restricted universe multiverse | |
deb http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse | |
deb-src http://mirrors.aliyun.com/ubuntu/ focal-updates main restricted universe multiverse | |
deb http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse | |
deb-src http://mirrors.aliyun.com/ubuntu/ focal-proposed main restricted universe multiverse | |
deb http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse | |
deb-src http://mirrors.aliyun.com/ubuntu/ focal-backports main restricted universe multiverse | |
#添加清华源 | |
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse | |
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal main restricted universe multiverse | |
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse | |
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-updates main restricted universe multiverse | |
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse | |
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-backports main restricted universe multiverse | |
deb https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse | |
# deb-src https://mirrors.tuna.tsinghua.edu.cn/ubuntu/ focal-security main restricted universe multiverse multiverse |
# ssh 允许远程 root 连接
vim /etc/ssh/sshd_config | |
PermitRootLogin yes |
# 修改 root 密码
sudo passwd root
# 删除用户
#删除用户（在 root 权限下） | |
userdel -f (强制删除用户) | |
userdel -r (同时删除用户以及家目录) | |
userdel -fr xiyang | |
#查看指定位置文件最后一行 | |
tail -1 /etc/passwd |
# 解决启动终端无法加载.bashrc 导致文件无法高亮
添加.bash_profile
if test -f .bashrc ; then | |
source .bashrc | |
fi |
