network restart fail on Ubuntu server 16.04
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In Ubuntu 16.04 server I want to change IP from /etc/network/interfaces and run sudo service networking restart and there is no error given but the IP didn't change.
I also ran sudo systemctl networking restart and sudo ifdown eth0 && sudo ifup eth0 but the IP doesn't change.
How do I restart the network interface in Ubuntu 16.04 so it saves the changes?
networking server 16.04 systemd
asked Jul 19 '16 at 8:39
Sajad Bahmani
814922
|
show 1 more comment
up vote
0
down vote
favorite
In Ubuntu 16.04 server I want to change IP from /etc/network/interfaces and run sudo service networking restart and there is no error given but the IP didn't change.
I also ran sudo systemctl networking restart and sudo ifdown eth0 && sudo ifup eth0 but the IP doesn't change.
How do I restart the network interface in Ubuntu 16.04 so it saves the changes?
networking server 16.04 systemd
asked Jul 19 '16 at 8:39
Sajad Bahmani
814922
I think you're on a normal home-network. Those use usually the Dynamic Host Configuration Protocol (DHCP). If the DHCP-Server doesn't assign that IP to you, you won't get that IP (no matter what you configure on /etc/networking/interfaces). Worse, you could even get no net at all, if you misconfigured.
– Bobby
Jul 19 '16 at 8:56
@ManuToMatic I need to set static IP on interface!
– Sajad Bahmani
Jul 19 '16 at 8:58
Yes, and in the DHCP-Server too. If your server says "Yo, I'm configured to use192.0.0.42so give it to me!" but your DHCP (Router/Modem) answers "Yeah, nice. But I only distribute192.168.0.2to192.168.0.50so you get that nice192.168.0.31", then your server gets192.168.0.31and not the IP he wants. If you want more information about how DHCP works: en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
– Bobby
Jul 19 '16 at 9:03
@ManuToMatic I don't have any DHCP server in my network and need set static IP
– Sajad Bahmani
Jul 19 '16 at 9:04
What? So how is your network configured? Believe me, if you didn't do anything special, your router IS a DHCP-Server. Alternatively you could explain exactly how your network is set up so we'd know more specific what we're on.
– Bobby
Jul 19 '16 at 9:06
|
show 1 more comment
up vote
0
down vote
favorite
up vote
0
down vote
favorite
In Ubuntu 16.04 server I want to change IP from /etc/network/interfaces and run sudo service networking restart and there is no error given but the IP didn't change.
I also ran sudo systemctl networking restart and sudo ifdown eth0 && sudo ifup eth0 but the IP doesn't change.
How do I restart the network interface in Ubuntu 16.04 so it saves the changes?
networking server 16.04 systemd
asked Jul 19 '16 at 8:39
Sajad Bahmani
814922
In Ubuntu 16.04 server I want to change IP from /etc/network/interfaces and run sudo service networking restart and there is no error given but the IP didn't change.
I also ran sudo systemctl networking restart and sudo ifdown eth0 && sudo ifup eth0 but the IP doesn't change.
How do I restart the network interface in Ubuntu 16.04 so it saves the changes?
networking server 16.04 systemd
networking server 16.04 systemd
asked Jul 19 '16 at 8:39
Sajad Bahmani
814922
asked Jul 19 '16 at 8:39
Sajad Bahmani
814922
edited Jul 19 '16 at 8:51
asked Jul 19 '16 at 8:39
Sajad Bahmani
814922
asked Jul 19 '16 at 8:39
Sajad Bahmani
814922
asked Jul 19 '16 at 8:39
Sajad Bahmani
814922
814922
I think you're on a normal home-network. Those use usually the Dynamic Host Configuration Protocol (DHCP). If the DHCP-Server doesn't assign that IP to you, you won't get that IP (no matter what you configure on /etc/networking/interfaces). Worse, you could even get no net at all, if you misconfigured.
– Bobby
Jul 19 '16 at 8:56
@ManuToMatic I need to set static IP on interface!
– Sajad Bahmani
Jul 19 '16 at 8:58
Yes, and in the DHCP-Server too. If your server says "Yo, I'm configured to use192.0.0.42so give it to me!" but your DHCP (Router/Modem) answers "Yeah, nice. But I only distribute192.168.0.2to192.168.0.50so you get that nice192.168.0.31", then your server gets192.168.0.31and not the IP he wants. If you want more information about how DHCP works: en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
– Bobby
Jul 19 '16 at 9:03
@ManuToMatic I don't have any DHCP server in my network and need set static IP
– Sajad Bahmani
Jul 19 '16 at 9:04
What? So how is your network configured? Believe me, if you didn't do anything special, your router IS a DHCP-Server. Alternatively you could explain exactly how your network is set up so we'd know more specific what we're on.
– Bobby
Jul 19 '16 at 9:06
|
show 1 more comment
I think you're on a normal home-network. Those use usually the Dynamic Host Configuration Protocol (DHCP). If the DHCP-Server doesn't assign that IP to you, you won't get that IP (no matter what you configure on /etc/networking/interfaces). Worse, you could even get no net at all, if you misconfigured.
– Bobby
Jul 19 '16 at 8:56
@ManuToMatic I need to set static IP on interface!
– Sajad Bahmani
Jul 19 '16 at 8:58
Yes, and in the DHCP-Server too. If your server says "Yo, I'm configured to use192.0.0.42so give it to me!" but your DHCP (Router/Modem) answers "Yeah, nice. But I only distribute192.168.0.2to192.168.0.50so you get that nice192.168.0.31", then your server gets192.168.0.31and not the IP he wants. If you want more information about how DHCP works: en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol
– Bobby
Jul 19 '16 at 9:03
@ManuToMatic I don't have any DHCP server in my network and need set static IP
– Sajad Bahmani
Jul 19 '16 at 9:04
What? So how is your network configured? Believe me, if you didn't do anything special, your router IS a DHCP-Server. Alternatively you could explain exactly how your network is set up so we'd know more specific what we're on.
– Bobby
Jul 19 '16 at 9:06
I think you're on a normal home-network. Those use usually the Dynamic Host Configuration Protocol (DHCP). If the DHCP-Server doesn't assign that IP to you, you won't get that IP (no matter what you configure on /etc/networking/interfaces). Worse, you could even get no net at all, if you misconfigured.
– Bobby
Jul 19 '16 at 8:56
I think you're on a normal home-network. Those use usually the Dynamic Host Configuration Protocol (DHCP). If the DHCP-Server doesn't assign that IP to you, you won't get that IP (no matter what you configure on /etc/networking/interfaces). Worse, you could even get no net at all, if you misconfigured.
– Bobby
Jul 19 '16 at 8:56
@ManuToMatic I need to set static IP on interface!
– Sajad Bahmani
Jul 19 '16 at 8:58
@ManuToMatic I need to set static IP on interface!
– Sajad Bahmani
Jul 19 '16 at 8:58
Yes, and in the DHCP-Server too. If your server says "Yo, I'm configured to use
192.0.0.42 so give it to me!" but your DHCP (Router/Modem) answers "Yeah, nice. But I only distribute 192.168.0.2 to 192.168.0.50 so you get that nice 192.168.0.31", then your server gets 192.168.0.31 and not the IP he wants. If you want more information about how DHCP works: en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol– Bobby
Jul 19 '16 at 9:03
Yes, and in the DHCP-Server too. If your server says "Yo, I'm configured to use
192.0.0.42 so give it to me!" but your DHCP (Router/Modem) answers "Yeah, nice. But I only distribute 192.168.0.2 to 192.168.0.50 so you get that nice 192.168.0.31", then your server gets 192.168.0.31 and not the IP he wants. If you want more information about how DHCP works: en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol– Bobby
Jul 19 '16 at 9:03
@ManuToMatic I don't have any DHCP server in my network and need set static IP
– Sajad Bahmani
Jul 19 '16 at 9:04
@ManuToMatic I don't have any DHCP server in my network and need set static IP
– Sajad Bahmani
Jul 19 '16 at 9:04
What? So how is your network configured? Believe me, if you didn't do anything special, your router IS a DHCP-Server. Alternatively you could explain exactly how your network is set up so we'd know more specific what we're on.
– Bobby
Jul 19 '16 at 9:06
What? So how is your network configured? Believe me, if you didn't do anything special, your router IS a DHCP-Server. Alternatively you could explain exactly how your network is set up so we'd know more specific what we're on.
– Bobby
Jul 19 '16 at 9:06
|
show 1 more comment
2 Answers
2
active
oldest
votes
up vote
0
down vote
I think it is a bug in Ubuntu network scripts.
If you will modify network interface and then do the ifdown it will fail. You must first bring the interface down. Then you can modify the file and then bring the interface up again:
$ ifdown eth0
$ $EDITOR /etc/network/interfaces
$ ifup eth0
answered Mar 20 '17 at 16:03
Hadrian Węgrzynowski
1
add a comment |
up vote
0
down vote
You don't need to restart anything. Using Network Manager (i.e. click on the network icon), disconnect the interface, and then click on it to reconnect. You should see the new IP on the interface.
In general, it's good to remember that if Network Manager is running, it expects to be managing interfaces. Attempting to change interfaces with cli commands will usually result in network manager changing them back, or something similar/worse. If you don't want Network Manager to manage an interface, simply delete the interface from Network Manager.
answered May 30 '17 at 4:49
Hugh Buntu
324211
add a comment |
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2 Answers
2
active
oldest
votes
2 Answers
2
active
oldest
votes
active
oldest
votes
active
oldest
votes
up vote
0
down vote
I think it is a bug in Ubuntu network scripts.
If you will modify network interface and then do the ifdown it will fail. You must first bring the interface down. Then you can modify the file and then bring the interface up again:
$ ifdown eth0
$ $EDITOR /etc/network/interfaces
$ ifup eth0
answered Mar 20 '17 at 16:03
Hadrian Węgrzynowski
1
add a comment |
up vote
0
down vote
I think it is a bug in Ubuntu network scripts.
If you will modify network interface and then do the ifdown it will fail. You must first bring the interface down. Then you can modify the file and then bring the interface up again:
$ ifdown eth0
$ $EDITOR /etc/network/interfaces
$ ifup eth0
answered Mar 20 '17 at 16:03
Hadrian Węgrzynowski
1
add a comment |
up vote
0
down vote
up vote
0
down vote
I think it is a bug in Ubuntu network scripts.
If you will modify network interface and then do the ifdown it will fail. You must first bring the interface down. Then you can modify the file and then bring the interface up again:
$ ifdown eth0
$ $EDITOR /etc/network/interfaces
$ ifup eth0
answered Mar 20 '17 at 16:03
Hadrian Węgrzynowski
1
I think it is a bug in Ubuntu network scripts.
If you will modify network interface and then do the ifdown it will fail. You must first bring the interface down. Then you can modify the file and then bring the interface up again:
$ ifdown eth0
$ $EDITOR /etc/network/interfaces
$ ifup eth0
answered Mar 20 '17 at 16:03
Hadrian Węgrzynowski
1
answered Mar 20 '17 at 16:03
Hadrian Węgrzynowski
1
answered Mar 20 '17 at 16:03
Hadrian Węgrzynowski
1
answered Mar 20 '17 at 16:03
Hadrian Węgrzynowski
1
1
add a comment |
add a comment |
up vote
0
down vote
You don't need to restart anything. Using Network Manager (i.e. click on the network icon), disconnect the interface, and then click on it to reconnect. You should see the new IP on the interface.
In general, it's good to remember that if Network Manager is running, it expects to be managing interfaces. Attempting to change interfaces with cli commands will usually result in network manager changing them back, or something similar/worse. If you don't want Network Manager to manage an interface, simply delete the interface from Network Manager.
answered May 30 '17 at 4:49
Hugh Buntu
324211
add a comment |
up vote
0
down vote
You don't need to restart anything. Using Network Manager (i.e. click on the network icon), disconnect the interface, and then click on it to reconnect. You should see the new IP on the interface.
In general, it's good to remember that if Network Manager is running, it expects to be managing interfaces. Attempting to change interfaces with cli commands will usually result in network manager changing them back, or something similar/worse. If you don't want Network Manager to manage an interface, simply delete the interface from Network Manager.
answered May 30 '17 at 4:49
Hugh Buntu
324211
add a comment |
up vote
0
down vote
up vote
0
down vote
You don't need to restart anything. Using Network Manager (i.e. click on the network icon), disconnect the interface, and then click on it to reconnect. You should see the new IP on the interface.
In general, it's good to remember that if Network Manager is running, it expects to be managing interfaces. Attempting to change interfaces with cli commands will usually result in network manager changing them back, or something similar/worse. If you don't want Network Manager to manage an interface, simply delete the interface from Network Manager.
answered May 30 '17 at 4:49
Hugh Buntu
324211
You don't need to restart anything. Using Network Manager (i.e. click on the network icon), disconnect the interface, and then click on it to reconnect. You should see the new IP on the interface.
In general, it's good to remember that if Network Manager is running, it expects to be managing interfaces. Attempting to change interfaces with cli commands will usually result in network manager changing them back, or something similar/worse. If you don't want Network Manager to manage an interface, simply delete the interface from Network Manager.
answered May 30 '17 at 4:49
Hugh Buntu
324211
answered May 30 '17 at 4:49
Hugh Buntu
324211
answered May 30 '17 at 4:49
Hugh Buntu
324211
answered May 30 '17 at 4:49
Hugh Buntu
324211
324211
add a comment |
add a comment |
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I think you're on a normal home-network. Those use usually the Dynamic Host Configuration Protocol (DHCP). If the DHCP-Server doesn't assign that IP to you, you won't get that IP (no matter what you configure on /etc/networking/interfaces). Worse, you could even get no net at all, if you misconfigured.
– Bobby
Jul 19 '16 at 8:56
@ManuToMatic I need to set static IP on interface!
– Sajad Bahmani
Jul 19 '16 at 8:58
Yes, and in the DHCP-Server too. If your server says "Yo, I'm configured to use
192.0.0.42so give it to me!" but your DHCP (Router/Modem) answers "Yeah, nice. But I only distribute192.168.0.2to192.168.0.50so you get that nice192.168.0.31", then your server gets192.168.0.31and not the IP he wants. If you want more information about how DHCP works: en.wikipedia.org/wiki/Dynamic_Host_Configuration_Protocol– Bobby
Jul 19 '16 at 9:03
@ManuToMatic I don't have any DHCP server in my network and need set static IP
– Sajad Bahmani
Jul 19 '16 at 9:04
What? So how is your network configured? Believe me, if you didn't do anything special, your router IS a DHCP-Server. Alternatively you could explain exactly how your network is set up so we'd know more specific what we're on.
– Bobby
Jul 19 '16 at 9:06