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IsaacS
Asked: 2017-10-02 07:08:43 +0800 CST

Any command to set/update static IP address (no hack)?

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Unlike many threads, I see my on both 14.04 and 16.04 the NIC configs are stored in /etc/NetworkManager/system-connections, which is still discussed on some threads but not many AFAI have seen. And I haven't found any tool-provided command. E.g. in this thread someone gives a hint to update the ip address defined in an existing NIC config file (using find, sed etc.), but that's still a hack and there's no guarantee it'll still work once anything on the network manager or else on operating system changes.

Question: is there anyway to create / update files under /etc/NetworkManager/system-connections from command line?

I'm on Ubuntu 14.04 but info on newer distros is also appreciated.

command-line

2 Answers

  1. Best Answer

    Use nmcli.

    Show the available connections:

    nmcli connection show

    Show the current settings for connection with UUID 9fe88459-efaf-45bd-8958-ca1e202d04fd:

    nmcli connection show uuid 9fe88459-efaf-45bd-8958-ca1e202d04fd

    Set the IPv4 address for this connection:

    nmcli connection modify uuid 9fe88459-efaf-45bd-8958-ca1e202d04fd ipv4.addresses 192.168.1.5
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  2. Its quite simple goto terminal and type in:- 

    dhclient -r

    This will let you drop your IP and get new from DHCP. What this is a Dynamic host configuration protocol client. The internet systems consortium DHCP Client, dhclient, provides a means for configuring one or more network interfaces using Dynamic Host Configuration Protocol, BOOTP protocol, or if these protocols fail, by statically assigning an address.

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