ifconfig
vi /etc/sysconfig/network
vi /var/log/messages 
vi /etc/sysconfig/network
ifconfig
exit
exit
ping 4.2.2.2
ifconfig
dhclient eth0
ifconfig
service network restart
ifconfig
ssh root@p2
cd /etc/ssh
ls
rm ssh_host*
service sshd restart
ssh root@p2
ping 4.2.2.2
yum install telnet tcpdump firewalld which
yum group list
yum groupinstall "System Administration Tools"
yum install bash
which bash
bash
exit
iptables -L
iptables -L -nv
