1. set static IP1. modify Nic configuration Edit: vi/etc/sysconfig/network-scripts/ifcfg-eth0DEVICE = eth0 # describe the device alias corresponding to the NIC, for example, in the ifcfg-eth0 file, it is eth0BOOTPROTO = static # set the way the Nic gets the IP address, the possible option is static, dhcp or bootp, respectively corresponding to the static specified IP address,
1. set static IP addresses
1. modify Nic configuration Edit: vi/etc/sysconfig/network-scripts/ifcfg-eth0
DEVICE = eth0 # describe the DEVICE alias for the NIC, for example, it is eth0 in the ifcfg-eth0 file
BOOTPROTO = static # set the way for the NIC to obtain the IP address. the possible options are static, dhcp, or bootp, which respectively correspond to the IP address specified by the static state and the IP address obtained through the dhcp protocol, IP addresses obtained through the bootp protocol
BROADCAST = 192.168.0.255 # corresponding subnet BROADCAST address
HWADDR = 00: 07: E9: 05: E8: B4 # physical address of the corresponding Nic
IPADDR = 12.168.0.33 # If you set the method for obtaining the IP address from the network adapter to static, This field specifies the IP address of the network adapter.
NETMASK = 255.255.255.0 # network mask corresponding to the network adapter
NETWORK = 192.168.0.0 # NETWORK address of the NIC
2. modify the gateway configuration
Edit: vi/etc/sysconfig/network:
GATEWAY = 192.168.0.1
NETWORKING = yes (indicates whether the system uses the network, which is generally set to yes. If it is set to no, the network cannot be used, and many system service programs cannot be started)
HOSTNAME = centos (set the host name of the local machine. the host name set here must correspond to the host name set in/etc/hosts)
GATEWAY = 192.168.0.1 (set the IP address of the GATEWAY connected to the local machine .)
The first three items are available by default when I open the editing here, so only GATEWAY is added.
3. modify DNS configuration
Edit: vi/etc/resolv. conf:
Nameserver 8.8.8.8
Nameserver is the IP address of the DNS server. The first is the first choice, and the second is the backup.
4. restart the network service.
Run the following command:
Service network restart or/etc/init. d/network restart
2. disable the firewall and use/sbin/iptables-F. If this is not the case, you will be disconnected from the server immediately.
The following is a description from the http://wiki.ubuntu.org.cn/IptablesHowTo
You can clear all rules through/sbin/iptables-F to temporarily stop the firewall: (warning: this is only applicable to environments without a firewall configured, if the environment with the default rule "deny" has been configured, this step will interrupt all network access to the system)
Run
/Sbin/iptables-P INPUT ACCEPT
Then execute
/Sbin/iptables-F
You can see the following information through iptables-L:
Chain INPUT (policy DROP 0 packets, 0 bytes) (Note: DROP)
Execute/sbin/iptables-F to immediately disconnect
When
/Sbin/iptables-P INPUT ACCEPT
To view the information through iptables-L again
Chain FORWARD (policy ACCEPT 0 packets, 0 bytes)
So it is safe to use now
/Sbin/iptables-F
III. View Hardware Information 1: View CPU
More/proc/cpuinfo | grep "model name"
Grep "model name"/proc/cpuinfo
If you feel more comfortable to watch
Grep "model name"/proc/cpuinfo | cut-f2-d:
How about linux commands.
II. View Memory
Grep MemTotal/proc/meminfo
Grep MemTotal/proc/meminfo | cut-f2-d:
Free-m | grep "Mem" | awk '{print $2 }'
III. check whether the cpu is 32-bit or 64-bit
View CPU bits (32 or 64)
# Getconf LONG_BIT
# Echo $ HOSTTYPE
# Uname-
IV. view the current linux version
# More/etc/RedHat-release
# Cat/etc/redhat-release
V. view the kernel version
# Uname-r
# Uname-
