What is Ifcfg?
Ethernet Interfaces. One of the most common interface files is ifcfg-eth0, which controls the first Ethernet network interface card or NIC in the system. In a system with multiple NICs, there are multiple ifcfg-eth files (where is a unique number corresponding to a specific interface).
What does Onboot Yes mean?
ONBOOT=answer: Where answer is one of the following: yes: This interface is activated at boot time. : This interface is not activated at boot time.
What is Nm_controlled?
The variable NM_CONTROLLED determines if the interface will be managed via NetworkManager ( yes ) or via the legacy network scripts ( no ). For a quick example, read here. Follow this answer to receive notifications.
What is Peerroutes?
PEERDNS. Whether the /etc/resolv. conf file used for DNS resolution contains information obtained from the DHCP server. PEERROUTES. Whether the information for the routing table entry that defines the default gateway for the interface is obtained from the DHCP server.
What does a subnet mask of 255.255 255.255 mean?
A network with a subnet mask of 255.255. 255.255 puts each device inside its own subnet, forcing them to communicate with the router before communicating with any other device.
What is Sysconfig used for?
The /etc/sysconfig/apmd file is used by apmd to configure what power settings to start/stop/change on suspend or resume. This file configures how apmd functions at boot time, depending on whether the hardware supports Advanced Power Management (APM) or whether the user has configured the system to use it.
Where is etc Sysconfig?
The /etc/sysconfig directory contains files that control the system configuration. See /usr/share/doc/initscripts*/sysconfig. txt for complete information about these files. The actual content of your /etc/sysconfig directory depends on the programs that you have installed on your machine.
How do I know if my Linux network card is bad?
Ethernet card is lifeline of any Linux server. So if you need to find out find out if your Ethernet card is being recognized or not then use dmesg, ifconfig, or netstat command. Command ifconfig can be use to configure a network interface card as well as to find out information about Ethernet card.
What is an example of an ifcfg file?
Here’s a typical ifcfg file for an interface that has a static IP address: Here’s an example for an interface that uses DHCP: Here, the ifcfg file doesn’t have to specify the IP address information because the interface gets that information from a DHCP server.
Where can I find the ifcfg-eth0 and ifcfg -eth1 file?
File configurations for each network device you may have or want to add on your system are located in the /etc/sysconfig/network-scripts/ directory with Red Hat Linux 6.1 or 6.2 and are named ifcfg-eth0 for the first interface and ifcfg-eth1 for the second, etc. Following is a example /etc/sysconfig/network-scripts/ifcfg-eth0 file:
Does ifcfg have to specify the IP address in it?
Here, the ifcfg file doesn’t have to specify the IP address information because the interface gets that information from a DHCP server. The following paragraphs describe the settings that you’re most likely to see in this file: DEVICE: The name of the device, such as eth0 or eth1.