❑ Legacy(Ubuntu)
1. ifconfig : Check interface to convert IP address
2. ifdown : Shut down the interface
3. vi /etc/network/interfaces : Change the interface information(static or dynamic)
4. ifup : No shutdown the interface
❑ Legacy(CentOS 7)
1. # vi /etc/sysconfig/network-scripts/ifcfg-xx
2.1 Static(Refer to the data below)
BOOTPROTO="static"
IPADDR="192.168.100.70"
GATEWAY="192.168.100.1"
NETMASK="255.255.255.0"
BOOTPROTO="static"
IPADDR="192.168.100.70"
GATEWAY="192.168.100.1"
NETMASK="255.255.255.0"
2.2 Dynamic(Refer to the data below)
BOOTPROTO="dhcp"
BOOTPROTO="dhcp"
3. # service network restart
❑ NetworkManager(CentOS 7)
1.1 Static
# nmcli connection add con-name [Connection name] type ethernet ifname [Interface name] ip4 "192.168.100.50/24" gw4 "192.168.100.2"
# nmcli connection reload
# nmcli connection up [Connection name] : [Interface name] and [Connection name] are connected.
# nmcli connection add con-name [Connection name] type ethernet ifname [Interface name] ip4 "192.168.100.50/24" gw4 "192.168.100.2"
# nmcli connection reload
# nmcli connection up [Connection name] : [Interface name] and [Connection name] are connected.
* You can input "nmcli connection show [Connection name]" to see "ipv4.method: manual".
1.2 Dinamic
# nmcli connection add con-name [Connection name] type ethernet ifname [Interface name] autoconnect yes
# nmcli connection reload
# nmcli connection up [Connection name] : [Interface name] and [Connection name] are connected.
# nmcli connection add con-name [Connection name] type ethernet ifname [Interface name] autoconnect yes
# nmcli connection reload
# nmcli connection up [Connection name] : [Interface name] and [Connection name] are connected.
* You can input "nmcli connection show [Connection name]" to see "ipv4.method : auto".
❑ NetworkManager(Static ↔ Dynamic)(CentOS 7)
1. Static → Dynamic
# nmcli connection modify [Connection name] connection.id [Connection name to be changed] ipv4.addresses "" ipv4.gateway "" ipv4.method auto
# nmcli connection reload
# nmcli connection modify [Connection name] connection.id [Connection name to be changed] ipv4.addresses "" ipv4.gateway "" ipv4.method auto
# nmcli connection reload
2. Dynamic → Static
# nmcli connection modify [Connection name] connection.id [Connection name to be changed] ipv4.addresses "192.168.100.100/24" ipv4.gateway "192.168.100.2" ipv4.method manual ipv4.dns "8.8.8.8"
# nmcli connection reload
# nmcli connection modify [Connection name] connection.id [Connection name to be changed] ipv4.addresses "192.168.100.100/24" ipv4.gateway "192.168.100.2" ipv4.method manual ipv4.dns "8.8.8.8"
# nmcli connection reload
| Check environment | |||
| O S | CentOS 7.4.1708(64bit) | CPU | Intel i7-4710MQ 2.50GHz |
| SHELL | GNU bash (4.3.46(2)) | RAM | 1 GB |