“network manager”

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sudo pacman -S networkmanager
sudo systemctl status NetworkManager.service
sudo systemctl start NetworkManager.service
sudo systemctl restart NetworkManager.service
sudo pacman -S nm-connection-editor
sudo pacman -S network-manager-applet

nmcli device
nmcli connection
nmcli c delete

System policy prevents control of network connections

System policy prevents control of network connections System policy prevents modification of network settings for all users<

vim /usr/share/polkit-1/actions/org.freedesktop.NetworkManager.policy

Open /usr/share/polkit-1/actions/org.freedesktop.NetworkManager.policy with root/sudo privileges and search for the following line:

System policy prevents modification of network settings for all users A few lines below that should be this:

auth_admin_keep</allow_active> Change it to:

yes</allow_active> Save the file and restart your computer.

设置取值有: no Not authorized. yes Authorized. auth_self Authentication by the owner of the session that the client originates from is required.

auth_admin

Authentication by an administrative user is required.

auth_self_keep

Like auth_self but the authorization is kept for a brief period (e.g. five minutes).

auth_admin_keep

Like auth_admin but the authorization is kept for a brief period (e.g. five minutes).

典型的场景是把allow_active的设置从auth_admin (root密码) 改成auth_self (当前用户密码) 或者yes (不要密码) 。

配置文件

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/etc/NetworkManager/NetworkManager.conf
/etc/NetworkManager/system-connections

network manager + openvpn 多个默认路由的问题

IPv4 Settings->Routes and checking “Use this connection only for resources on its network”. https://www.debuntu.org/how-to-network-manager-openvpn-overwrites-default-route/

DNS

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vim /etc/NetworkManager/NetworkManager.conf

# add following lines
[main]
dns=systemd-resolved

使用 systemd-resolved, networkmanager 会把 /etc/resolv.conf 设置成 127.0.0.1:53, 当然 systemd-resolved 要配置成 DNSStubListener=yes 开启本地的 53 端口, 这样 dns 请求就交给 systemd-resolved 处理了.

https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/8/html/configuring_and_managing_networking/configuring-the-order-of-dns-servers_configuring-and-managing-networking