Print paragraph between semicolons containing a pattern

Below two awk snippets can do this for you:

• awk 'function dothis(){ if(v && s==2){ print p} if(s==2)s=v=p="" }{ dothis(); s += /;/ ; v += /XXXX/; s ? p = length(p) ? p ORS $0 : $0 : "" }END{dothis()}' file

   

• awk '($0 ~ /;/){set++;} set{v=v?v ORS $0:$0} (v ~ /XXXX/){value=1} {if(set>1 && value==1){print v;v="";value="";set=""}}'  filename 

Configure/change IP in CentOS/Linux

From command line run following command:

ifconfig
e.g. ifconfig 10.10.10.10 eth0

This will immediately assign the IP to the system. But this will be removed after reboot.

To make it permanent, edit below file:

/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0
BOOTPROTO=static
DHCPCLASS=yes
IPADDR=10.10.10.10
NETMASK=255.255.255.0
ONBOOT=yes

.....

Now define gateway in file:

/etc/sysconfig/network

NETWORKING=yes
HOSTNAME=manutablet
GATEWAY=192.168.1.254

 ..

Once these are defined, restart network services:
service network restart

Note: Do not stop/start service. Only restart it otherwise after stop you will lose your connection and you will need to go to the server and start the services from console.