Configuring a Network

Network Commands

lsmod # see what processes is loaded into memory
nmtui # modify network info
ifdown #unconfigures a NIC
ifup # configures Nic using /etc/sysconfig/

Configure Network interface

/etc/sysconfig/network-scripts/ifcfg-interface file
==Restart Network ==
/etc/init.d/networking restart 

DNS Server File

/etc/resolv.conf
nslookup # same as dig but depreciated
dig # used to query records

Files which lists ports used

/etc/services