Linux – information gathering (part 4)
This is the fourth part of Linux – information gathering.
Network
Find all available network connections.
1 | ifconfig -a |
In the following files you can find specific information about the desired network configuration.
1 2 | cat /etc/network/interfacescat /etc/sysconfig/network |
You can find the configuration file for DNS resolvers here:
1 2 | cat /etc/resolv.confcat /etc/networks |
With the administration tool for IPv4/IPv6 packet filtering and NAT you can list all filters.
1 | iptables -L |
Show or set the system’s host name.
1 | hostname |
Show the system’s DNS domain name.
1 | dnsdomainname |
Connections
The command „lsof“ lists open files.
1 | lsof -i |
List port socket numbers of standard services.
1 | cat /etc/services |
The command „netstat“ or „chkconfig“ lists network connections
1 2 3 | netstat -antupnetstat -antpxnetstat -tulpn |
1 | chkconfig --list |
Cache
With „arp“ you can manipulate or display the kernel’s IPv4 network neighbour cache.
1 | arp -e |
The following command displays existing routes.
1 | route |
Previous parts
Linux – information gathering (part 1)
Linux – information gathering (part 2)