First priority: before the amendment must be a backup system, if a virtual machine snapshot
NIC view of the virtual machine configuration
Note bridge mode and NAT mode
Bridge Mode: the network level, the virtual machine and the PC are in the same level position, and routers connected directly to a virtual machine
NAT modes: network level, and the virtual machine is connected to the router via the host PC conversion of a child, a virtual machine
About a static IP and dynamic IP connection:
Static IP: Fixed IP address of the Internet,
Dynamic IP: automatically obtain an IP address access, successful DHCP mode
Features:
Static IP: IP address of the ISP (Internet Service Provider) can provide direct Internet access, because IPv4 addresses have been allocated, the index is very scarce
Server special needs, do not allow the address change often, common in the local area network printer, web server, FTP server, etc.
Dynamic IP: not a real IP address, dynamic IP address assigned to the user based on the domain name server
Commonly used in large LAN, the DHCP client on the server, reducing the workload of network administrators
Targeting
Use vim to modify
Note: About switching Linux graphical interface and a command interface, Ctrl + Alt + F2 ~ F6 is a command-line interface; Ctrl + Alt + F1 is a graphical interface
Dynamic IP set up a virtual machine
Set a static IP address
The meaning Ifcfg-eno16777736 file:
BOOTPROTO network parameter settings: Static IP: STATIC or dynamic IP: DCHP, NONE: you not specified
DEFROUTE
IPV4_FAILURE_FATAL
IPV6INIT
IPV6_AUTOCONF
IPv6_DEFROUTE
IPV6_FAILURE_FATAL
NAME
UUID Universally Unique Identifier.
DEVICE physical device name (ppp dynamic devices except for the name of Luo Series)
ONBOOT yes: when the device is activated at boot, no: the device is not activated during boot
USERCTL yes: non-root user can control the device, no: do not allow non-root user control device
BOOTPROTO none: do not use the boot protocol, bootp: bootp protocol to use, dhcp: dhcp protocol to use
PEERDMS
PEERROUTES
IPV6_PEERDMS
IPV6_PEERROUTES
IPADDR IP address
NETMASK network mask
NETWORK Network Address
BROADCAST Broadcast address
GATEWAY Gateway address
PPP and SLIP files used values:
PERSIST yes: the device will always remain active, even if the modem is hung up lead inactive, no: no device has remained active state
MODEMPORT modem device name
The linear velocity LINESPEED modem
DEFABORT yes: When you create or edit the script to insert the default interface planting strings, no: do not insert the default planting strings when creating or editing scripts that interface
Use all files ppp
DEFROUTE yes: the default router interface, no: does the interface is set to the default router
ESCAPECHARS yes: Use predefined asymcmap, no: Do not use a predefined asyncmap.
(Where it represents a simplified interface; that a user does not specify the escape character, however, almost any situation can use a asyncmap 00000000, and, if desired, may be provided by using any asyncmap PPPOPTIONS..)
HARDFLOWCTL yes: using hardware flow control, no: do not use hardware flow control
PPPOPTIONS is arbitrary option string. It is placed at the end of the command line to overwrite earlier
PAPNAME = name, where name is part of the "name $ PAPNAME" the pppd command line.
Note that the options "remotename" always specified as the logical ppp device name, such as "ppp0" (if previously there are other ppp device is activated, which may be a physical device ppp1) facilitates the management pap / chap files --name / passwd ppp associated with the logical name of the device, so they can be managed together. In theory, as the PPP from the logic devices other "ppp0" - than "pppN" such as "worldnet" or "myISP" name is feasible.
REMIP Remote IP address
MTU setting MTU value
MRU MRU set value
DISCONNECTTIMEOUT when a successful connection is terminated after how many seconds to wait and connect again
When a connection failure ERTRYTIMEOUT so fewer seconds to reconnect
IPv4 and IPv6
Simple is the IPv4 32-bit IP address (approximately 4.3 billion IP addresses can be assigned), IPv6 is an IP address 128