Linux Networking Tips
Posted on November 12, 2006
[tag]Linux[/tag] Networking [tag]Tips[/tag]:
1. ping - Test Network Connection
- ping google.com
2. ifconfig - View/Configure [tag]Network[/tag] Adapter Configuration
- ifconfig -a
3. netstat - displays information for all active sockets, including the port numbers associated with each type of network service.
a. List of listening network ports (TCP and UDP sockets):
- /bin/netstat -tulp
b. Display LISTEN PORT:
- /bin/netstat -nap |grep LISTEN
c. Display Open Port:
- /usr/bin/nmap localhost OR /bin/netstat -a OR /bin/fuser -n tcp [port]
4. lsof - list open files
a. Display all of the TCP and UDP sockets to which programs are listening:
- /usr/bin/lsof -i -n | egrep ‘COMMAND|LISTEN|UDP’
5. nslookup - find all of the IP addresses for a given domain name
- /usr/bin/nslookup google.com
6. traceroute - a utility to view the number of hops (connection points) and response time to get to a remote system or web site.
- /usr/bin/traceroute www.yahoo.com
7. mtr - combines the functionality of the traceroute and ping programs in a single network diagnostic tool.
- /usr/bin/mtr redhat.com
8. hostname - display the host name, domain name or IP address of your machine.
user1@planetmy:~$ /bin/hostname
planetmy
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