Fedora 27
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Network Settings
2017/12/13
[1] Set static IP address to the server. ( Replace the section 'ens3' to your own interface name )
# set hostname

[root@localhost ~]#
hostnamectl set-hostname dlp.srv.world
# display devices

[root@localhost ~]#
nmcli device 

DEVICE  TYPE      STATE      CONNECTION
ens3    ethernet  connected  ens3
lo      loopback  unmanaged  --
# set IPv4 address

[root@localhost ~]#
nmcli connection mod ens3 ipv4.addresses 10.0.0.30/24

# set default gateway

[root@localhost ~]#
nmcli connection mod ens3 ipv4.gateway 10.0.0.1

# set DNS

[root@localhost ~]#
nmcli connection mod ens3 ipv4.dns 10.0.0.1

# set manual for static setting (it's [auto] for DHCP)

[root@localhost ~]#
nmcli connection mod ens3 ipv4.method manual

# restart the interface and reload the settings

[root@localhost ~]#
nmcli connection down ens3; nmcli connection up ens3

Connection 'ens3' successfully deactivated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/1)
Connection successfully activated (D-Bus active path: /org/freedesktop/NetworkManager/ActiveConnection/2)
# show settings

[root@localhost ~]#
nmcli device show ens3 

GENERAL.DEVICE:                         ens3
GENERAL.TYPE:                           ethernet
GENERAL.HWADDR:                         52:54:00:C7:F1:07
GENERAL.MTU:                            1500
GENERAL.STATE:                          100 (connected)
GENERAL.CONNECTION:                     ens3
GENERAL.CON-PATH:                       /org/freedesktop/NetworkManager/ActiveConnection/2
WIRED-PROPERTIES.CARRIER:               on
IP4.ADDRESS[1]:                         10.0.0.30/24
IP4.GATEWAY:                            10.0.0.1
IP4.DNS[1]:                             10.0.0.10
IP6.ADDRESS[1]:                         fe80::5054:ff:fec7:f107/64
IP6.GATEWAY:                            --
# show state

[root@localhost ~]#
ip addr show 

1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN group default qlen 1000
    link/loopback 00:00:00:00:00:00 brd 00:00:00:00:00:00
    inet 127.0.0.1/8 scope host lo
       valid_lft forever preferred_lft forever
    inet6 ::1/128 scope host
       valid_lft forever preferred_lft forever
2: ens3: <BROADCAST,MULTICAST,UP,LOWER_UP> mtu 1500 qdisc fq_codel state UP group default qlen 1000
    link/ether 52:54:00:c7:f1:07 brd ff:ff:ff:ff:ff:ff
    inet 10.0.0.30/24 brd 10.0.0.255 scope global ens3
       valid_lft forever preferred_lft forever
    inet6 fe80::5054:ff:fec7:f107/64 scope link
       valid_lft forever preferred_lft forever
[2] Disable IPv6 like follows if you do not need it.
[root@localhost ~]#
vi /etc/default/grub
# line 7: add

GRUB_CMDLINE_LINUX="
ipv6.disable=1
rd.lvm.lv=fedora-server/root.....
# apply changes

[root@localhost ~]#
grub2-mkconfig -o /boot/grub2/grub.cfg

[root@localhost ~]#
reboot

 
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