Modifying the IP address and gateway is a very common operation. When doing related experiments, if it is not set well, it will bring a lot of unnecessary troubles..
1. Check the IP address : ifconfig, modify the IP to take effect temporarily, no need to restart, restart fails: ifcfg eth0 1.1.1X
2. Modify the IP address
vi /etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE=eth0
BOOTPROTO=none
BROADCAST=192.168.1.255
IPADDR=192.168.1.33
NETMASK=255.255.255.0
NETWORK=192.168.1.0
ONBOOT=yes
USERCTL=no
PEERDNS=no
TYPE=Ethernet
If there are 2 network cards, the relevant information of the second one is stored in the ifcfg-eth1 file.
vi /etc/sysconfig/network-scripts/ifcfg-eth1
DEVICE=eth1
ONBOOT=yes
BOOTPROTO=none
IPADDR=192.168.2.34
NETMASK=255.255.255.0
USERCTL=no
PEERDNS=no
TYPE=Ethernet
NETWORK=192.168.2.0
BROADCAST=192.168. 2.255
3. Modify gateway
vi /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=Aaron
GATEWAY=192.168.1.1
4. Restart the network configuration: After modifying the IP and gateway, the network service must be restarted to take effect.
/etc/init.d/network restart
5. View the host name hastname -a
6. Modify the host name (temporary effect, restart invalid)
hostname new hostname
7. Modify the host name through the configuration file /etc/sysconfig/network .
# cat /etc/sysconfig/network
NETWORKING=yes
HOSTNAME=localhost.localdomai
8. View memory free -m
9. View the hard disk df -h
10. Other commands
View process ps
directory switch cd
file move/rename mv
delete file rm
empty file echo > file
file copy
Create file touch
View system time date hwclock
file authorization chmod
Modify file attribute group chown
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