Most used Commands and Standered file directory path in Linux

To modify host name and IP address in Linux

/etc/hosts file

create bond( /etc/sysconfig/network-scripts/ifcfg-bond0)

DEVICE=bond0

ONBOOT=yes

USERCTL=no

BOOTPROTO=none

BONDING_OPTS="primary=eth0"

IPADDR=xx.xx.xxx.xx

NETMASK=xxx.xxx.xxx.x

GATEWAY=xx.xx.xxx.x

BROADCAST=xx.xx.xxx.xxx

configure net work(/etc/sysconfig/network-scripts/ifcfg-eth0

DEVICE=eth0

ONBOOT=yes

USERCTL=no

BOOTPROTO=none

SLAVE=yes

MASTER=bond0

change the domine name

/etc/sysconfig/network(hostname)

/etc/hosts

service network restart

To delete user in Linux 

userdel -r userName(-r used to delete along with home directory)