1.修改dns服务器：/etc/resolv.conf
2.ssh证书连接简易操作：
ssh-keygen -t rsa -b 2048 | 生成密钥对
ssh-copy-id username@remote_host | 将你的公钥（通常是 ~/.ssh/id_rsa.pub）添加到你想要连接的服务器上的 ~/.ssh/authorized_keys 文件中。你可以使用 ssh-copy-id 命令来方便地将公钥复制到远程服务器上。
配置 SSH 客户端：在你的 SSH 客户端配置文件（通常是 ~/.ssh/config）例如：
Host remote_host
HostName <remote_host_IP_address>
User username
IdentityFile ~/.ssh/id_rsa
3.vm在新建虚拟机时选择ubuntu而没用选择ubuntu64位时，网速为10Mb/s，在虚拟机目录中找到Ubuntu.vmx,在其末尾添加ethernet0.virtualDev = "e1000"。
4.修改当前用户密码：passwd，修改root密码sudo passwd。
5.遇到错误 unknown symbol 可能是未安装其他依赖模块，
[ 457.454449] mt76: Unknown symbol ieee80211_sta_register_airtime (err -2)
[ 457.454506] mt76: Unknown symbol ieee80211_free_hw (err -2)
[ 457.454514] mt76: Unknown symbol ieee80211_txq_schedule_start (err -2)
安装当前内核版本拓展的模块sudo apt install linux-modules-extra-$(uname -r)。
999+.ubuntu2204LTS 腾讯云源
deb https://mirrors.cloud.tencent.com/ubuntu/ jammy main restricted universe multiverse
deb-src https://mirrors.cloud.tencent.com/ubuntu/ jammy main restricted universe multiverse
deb https://mirrors.cloud.tencent.com/ubuntu/ jammy-security main restricted universe multiverse
deb-src https://mirrors.cloud.tencent.com/ubuntu/ jammy-security main restricted universe multiverse
deb https://mirrors.cloud.tencent.com/ubuntu/ jammy-updates main restricted universe multiverse
deb-src https://mirrors.cloud.tencent.com/ubuntu/ jammy-updates main restricted universe multiverse
deb https://mirrors.cloud.tencent.com/ubuntu/ jammy-proposed main restricted universe multiverse
deb-src https://mirrors.cloud.tencent.com/ubuntu/ jammy-proposed main restricted universe multiverse
deb https://mirrors.cloud.tencent.com/ubuntu/ jammy-backports main restricted universe multiverse
deb-src https://mirrors.cloud.tencent.com/ubuntu/ jammy-backports main restricted universe multiverse
ubuntu2004 网易源
deb http://mirrors.163.com/ubuntu/ wily main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ wily-security main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ wily-updates main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ wily-proposed main restricted universe multiverse
deb http://mirrors.163.com/ubuntu/ wily-backports main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ wily main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ wily-security main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ wily-updates main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ wily-proposed main restricted universe multiverse
deb-src http://mirrors.163.com/ubuntu/ wily-backports main restricted universe multiverse