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1# Ad-Hoc Configuration {#ad-hoc-network-config}
2
3You can use [](#opt-networking.localCommands) to
4specify shell commands to be run at the end of `network-setup.service`. This
5is useful for doing network configuration not covered by the existing NixOS
6modules. For instance, to statically configure an IPv6 address:
7
8```nix
9{
10 networking.localCommands =
11 ''
12 ip -6 addr add 2001:610:685:1::1/64 dev eth0
13 '';
14}
15```