Network Status Check command (command requires the following three net-tools Kit)
ifconfig see card basic information inet for the ip address netmask subnet mask ether as MAC address lo card in exchange for the local address 127.0.0.1
mii-tool to check the physical link card case
route View Gateway -n do not resolve the domain name (faster)
Change the network card named eth0 (easy server-side batch processing)
1 Modify / etc / default / grub set GRUB_CMDLINE_LINUX_DEFAULT = "iosdevname = 0 net.ifname = 0"
2 update grub grub-mkconfig -o /boot/grub/grub.cfg
3 reboot reboot
Modify the network configuration
ifconfig
ifconfig <card> <ip address> [network <mask>] Review ip address card (also take the opportunity to modify the mask)
ifup <card> enabled NIC ifdown <card> turn off the card (typically need not be provided)
route
route add default gw <gateway ip> to modify the default gateway
route del default gw <gateway ip> delete the default gateway
route add -host <ip1> gw < ip2> go ip1 walk gateway ip2
route add -net <ip1> network < ip2> gw <ip3> destined for the subnet mask for the network segment ip2 ip1 go ip3
Network Troubleshooting Commands
ping monitor to a site is smooth ping www.baidu.com
traceroute trace route to a site through
mtr and traceroute similar to the more powerful
nslookup domain name -> ip
tenlet monitor port is smooth
tcpdump trace tcp packets
-i any arbitrary tcp package
-n Do not resolve domain names
Flights a host port specified host port specified (specify a host name and port and)
-W file saved to a file file
netstat displays more detailed information on the network connection
ss and similar netstat