The subdirectory /proc/net follows the usual pattern.
NOTE: The general rule is that the contents, or even the existence of the /proc/net directory, depends on your kernel configuration. If Networking is not enabled, the /proc/net directory may not exist.
The following Table shows the additional values you get for IP version 6 if you configure the kernel to support this.
| File | Content |
|---|---|
| udp6 | UDP sockets (IPv6). |
| tcp6 | TCP sockets (IPv6). |
| raw6 | Raw device statistics (IPv6). |
| igmp6 | IP multicast addresses, which this host joined (IPv6). |
| if_inet6 | List of IPv6 interface addresses. |
| ipv6_route | Kernel routing table for IPv6. |
| rt6_stats | Global IPv6 routing tables statistics. |
| sockstat6 | Socket statistics (IPv6). |
| snmp6 | Snmp data (IPv6). |
This table lists the files and their meaning.
| File | Content |
|---|---|
| arp | Kernel ARP table. |
| dev | Network devices with statistics. |
| dev_mcast | The Layer2 multicast groups a device is listening to (interface index, label, number of references, number of bound addresses). |
| dev_stat | network device status. |
| ip_fwchains | Firewall chain linkage. |
| ip_fwnames | Firewall chain names. |
| ip_masq | Directory containing the masquerading tables. |
| ip_masquerade | Major masquerading table. |
| netstat | Network statistics. |
| raw | raw device statistics. |
| route | Kernel routing table. |
| rpc | Directory containing rpc info. |
| rt_cache | Routing cache. |
| snmp | SNMP data. |
| sockstat | Socket statistics. |
| tcp | TCP sockets. |
| tr_rif | Token ring RIF routing table. |
| udp | UDP sockets. |
| unix | UNIX domain sockets. |
| wireless | Wireless interface data (Wavelan etc). |
| igmp | IP multicast addresses, which this host joined. |
| psched | Global packet scheduler parameters. |
| netlink | List of PF_NETLINK sockets. |
| ip_mr_vifs | List of multicast virtual interfaces. |
| ip_mr_cache | List of multicast routing cache. |
You can use this information to see which network devices are available in your system and how much traffic was routed over those devices:
cat /proc/net/dev Inter-|Receive |[... face |bytes packets errs drop fifo frame compressed multicast|[... lo: 908188 5596 0 0 0 0 0 0 [... ppp0:15475140 20721 410 0 0 410 0 0 [... eth0: 614530 7085 0 0 0 0 0 1 [... ...] Transmit ...] bytes packets errs drop fifo colls carrier compressed ...] 908188 5596 0 0 0 0 0 0 ...] 1375103 17405 0 0 0 0 0 0 ...] 1703981 5535 0 0 0 3 0 0
In addition, each Channel Bond interface has its own directory. For example, the bond0 device will have a directory called /proc/net/bond0/. It will contain information that is specific to that bond, such as the current slaves of the bond, the link status of the slaves, and how many times the slaves link has failed.