Basic Network Tools under Linux

<title>Basic Network Tools under Linux</title> Basic Network Tools under Linux table of Contents

• Ifconfig
• Route
• Ip
• Dns
• Other configuration files

Ifconfig

Ifconfig eth0 upifconfig eth0 downifconfig eth0 192.168.10.111

Permanent IP
/etc/sysconfig/network-scripts/ifcfg-eth0

Ipaddr=xxxxnetmask=xxxgateway=xxxxxpeerdns={yes|no}: Indicates whether the DNS server specified by the DHCP server is accepted

/etc/sysconfig/network-scripts/ifcfg-eth0:1

Device=eth0:1ipaddr=xxxnetmask=xxxgateway=xxx

Output of the Ifconfig command

RX Packets: Packets Received TX packets: Packets sent Rx bytes: Number of bytes received tx bytes: Bytes Sent Mtutxqueuelen 1000

Route

Route add 0.0.0.0/0 GW 222.17.106.126route add 192.168.0.8 GW 222.17.106.126route del 192.168.0.8

Traceroute 192.168.0.8

Permanent Route
/etc/sysconfig/network-scripts/route-eth0
Format 1

192.168.1.10 via 10.0.0.10192.168.1.11 via 10.0.0.10

Format 2

address0=192.168.1.10netmask0=255.255.255.0gateway0=10.0.0.10

address1=192.168.1.11netmask1=255.255.255.0gateway1=10.0.0.10

Ip

1. Link: Configure NIC properties
   Man IP link
   Show
   

   IP link showip-s link show

   Set
   

   IP link set eth1 txqueuelen 150

2. Addr: Protocol Address
   Man IP Address
   Add
   

   IP addr Add 172.16.208.118 dev eth0  (presence, but no label, ifconfig invisible, IP addr visible) IP addr add 172.16.208.119 dev eth0 Lab El eth0:1  (Ifconfig See)

   Del
   

   IP addr del 172.16.208.119/32 dev eth0ip addr del 172.16.208.118/32 dev eth0

   Show
   

   IP addr Showip Addr show eth0

3. Route: Configure Routing
   Man IP route
   IP route
   IP Route List
   

IP route add 10.0.0.0/8 Dev eth1 via 172.16.208.1ip route del 10.0.0.0/8 Dev eth1ip route add 192.168.1.0/24 Dev eth1 via 172.16.208.1ip Route del 192.168.1.0/24

Dns

Vi/etc/resolv.conf

Host

Host Baidu.comhost-t MX Baidu.comhost 111.13.101.208

Nslookup

Nslookup baidu.comnslookup-q=mx baidu.com

Dig

Dig-t NS.                     # Find the root server NAME serverdig-t A www.xxx.com            # Find the IP address of the www.xxx.com  DNS in/etc/resolve.confdig-x ipaddr                   # Find I P corresponding host name dig-t AXFR www.xxx.com         # Full zone transfer dig-t ixfr= serial number www.xxx.com   # incremental zone transfer dig +trace baidu.com            # See how to find Baid U.comdig +nocmd xxx                  # does not show dig version number dig +short xxx                  # output condensed information dig +nostat XXX                 # does not display statistics, default output response time dig +nocomment xx X              # Save details Annotation Information

Other configuration files

/etc/services the file defined by the port number
/etc/protocols defines the relevant data for the IP packet protocol, including the definition of the ICMP/TCP/UDP packet protocol

Host Name
Vi/etc/sysconfig/network

Networking=yes     # Whether to turn on network Networking_ipv6=no # Whether to turn on IPv6 network hostname=xxxxx

Basic Network Tools under Linux