Use Shell to modify dynamic IP to static IP, static IP to other static IP

(1) The idea of modifying dynamic IP to static IP

① back up the Ifcfg-eth0 file before modifying IP

② Enter the NIC configuration directory/etc/sysconfig/network-scripts/ifcfg-eth0

③ modifying Bootproto=static

④ modifying Onboot=yes

⑤ Configuring a static IP address ipaddr

⑥ Configuring DNS NETMASK

⑦ Configuring the Gateway Gatway

⑧ Restart the NIC authentication configuration, verify the configuration Results service network restart

(2) The idea of modifying static IP to other static IP

☆ First determine whether it is static IP grep "DHCP"/etc/sysconfig/network-scripts/ifcfg-eth0/

☆

If[$? -ne 0]; Then

Sed-i ' s/^ipaddr/#IPADDR/g ' ifcfg-eth0

Read-p "Please Enter IP:" ipaddr

echo "ipaddr=" $IPADDR ">>/etc/sysconfig/network-scripts/

Fi

☆ Restart NIC Verify configuration results service Network restart

code example:

#!/bin/bash #2017年12月17日19:34:40 #by author Daqi #change IP Shell Net_file= "/etc/sysconfig/network-scripts" Net_dir= "Ifcfg-eth0" CD $NET _file/ #change IP static for static: grep "DHCP" $NET _file/$NET _dir If [$?-ne 0];then Sed-i s/^ipaddr/#IPADDR/g $NET _dir Read-p "Please enter IP address,example 192.168.0.11 IP": ipaddr echo "Ipaddr= $IPADDR" >> $NET _file/$NET _dir Service Network restart Else #change IP dhcp for static Sed-i s/dhcp/static/g $NET _dir Sed-i s/onboot=no/onboot=yes/g $NET _dir Read-p "Please enter IP address,example 192.168.0.11 IP": ipaddr cat>> $NET _file/$NET _dir <<eof Ipaddr= $IPADDR netmask=255.255.255.0 gatway=192.168.2.1 Eof Service Network restart Fi

Use Shell to modify dynamic IP to static IP, static IP to other static IP