Assigning IP Address on Linux:
To check IP address:
# ifconfig >> to see all interfaces
# ifconfig eth0 >>
to see specific interface
Required File to Edit:
#vi /etc/sysconfig/network-scripts/ifcfg-eth0 >> edit ifcfg-eth0 file to add IP detail
#Vi etc/resolv.conf >> to add NameServer or dns
# vi /etc/sysconfig/network >> add GATEWAY & Hostname etc
#vi /etc/hosts >> To Name Resolv
Required File to Edit:
#vi /etc/sysconfig/network-scripts/ifcfg-eth0 >> edit ifcfg-eth0 file to add IP detail
#Vi etc/resolv.conf >> to add NameServer or dns
# vi /etc/sysconfig/network >> add GATEWAY & Hostname etc
#vi /etc/hosts >> To Name Resolv
To up/down interfaces:
# ifconfig eth0 up
>> to up eth0
#ifconfig eth0 down
>> to down eth0
Assigning IP Address Temporary on interface: (After
restarting this IP address will gone)
# ifconfig eth0 172.16.2.21 netmask 255.255.255.0 up >> set IP on eth0 interface
# route add default gw 172.16.2.1 eth0 >> set getaway on eth0 interface
Assigning IP Address Permanently on interface: (For this situation you have to edit mamually
and also using netconfig command)
Using netconfig command:
# netconfig >>(Press Enter Key, Now you get an
interface, where you configure IP address). Then
# service network restart (Press Enter Key, that will
done)
(N.B. As soon as possible i provide more details screen shot)
Manually Assigning IP address:
# cat /etc/sysconfig/network-scripts/ifcfg-eth0 >> just view the configuration file
# vi /etc/sysconfig/network-scripts/ifcfg-eth0 >> edit ifcfg-eth0 file to add IP
detail
To add default gateway (location - /etc/sysconfig/network)
# vi /etc/sysconfig/network >> add GATEWAY
To Add NameServer ( /etc/resolv.conf)
Vi etc/resolv.conf >> to add NameServer
# services network restart >> run this command to enable changes .
Now you see the change of "ifcfg-eth0" file. # cat /etc/sysconfig/network-scripts/ifcfg-eth0
# vi /etc/sysconfig/network-scripts/ifcfg-eth0:1 >> to create new virtual interface and assign IP
check out the created virtual interface
# services network restart >> run this command to enable changes .
# cat /etc/sysconfig/network-scripts/ifcfg-eth0:1 >> to view interface
Some other Ping commands:
#ping 4.2.2.2 -s 2048 >> to ping load
#ping 4.2.2.2 -c 5 >> number of time to ping
#ping 172.168.1.0 -b >> Broadcast ping
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