Installation guide

Chapter 2. The proc File System 43
• dev_mcast — Displays the various Layer2 multicast groups each device is listening to.
• igmp — Lists the IP multicast addresses which this system joined.
• ip_fwchains — If ipchains are in use, this virtual file reveals any current rule.
• ip_fwnames — If ipchains are in use, this virtual file lists all firewall chain names.
• ip_masquerade — Provides a table of masquerading information under ipchains.
• ip_mr_cache — List of the multicast routing cache.
• ip_mr_vif — List of multicast virtual interfaces.
• netstat — Contains a broad yet detailed collection of networking statistics, including TCP time-
outs, SYN cookies sent and received, and much more.
• psched — List of global packet scheduler parameters.
• raw — List of raw device statistics.
• route — Displays the kernel’s routing table.
• rt_cache — Contains the current routing cache.
• snmp — List of Simple Network Management Protocol (SNMP) data for various networking pro-
tocols in use.
• sockstat — Provides socket statistics.
• tcp — Contains detailed TCP socket information.
• tr_rif — The token ring RIF routing table.
• udp — Contains detailed UDP socket information.
• unix — Lists UNIX domain sockets currently in use.
• wireless — Lists wireless interface data.
2.3.8. /proc/scsi/
This directory is analogous to the /proc/ide/ directory only it is for connected SCSI devices.
The primary file in this directory is /proc/scsi/scsi, which contains a list of every recognized
SCSI device. From this listing, the type of devices, as well as the model name, vendor, SCSI channel
and ID data is available.
For example, if a system contains a SCSI CD-ROM, tape drive, hard drives, and RAID controller, this
file would look similar to this:
Attached devices:
Host: scsi1 Channel: 00 Id: 05 Lun: 00
Vendor: NEC Model: CD-ROM DRIVE:466 Rev: 1.06
Type: CD-ROM ANSI SCSI revision: 02
Host: scsi1 Channel: 00 Id: 06 Lun: 00
Vendor: ARCHIVE Model: Python 04106-XXX Rev: 7350
Type: Sequential-Access ANSI SCSI revision: 02
Host: scsi2 Channel: 00 Id: 06 Lun: 00
Vendor: DELL Model: 1x6 U2W SCSI BP Rev: 5.35
Type: Processor ANSI SCSI revision: 02
Host: scsi2 Channel: 02 Id: 00 Lun: 00
Vendor: MegaRAID Model: LD0 RAID5 34556R Rev: 1.01
Type: Direct-Access ANSI SCSI revision: 02
Each SCSI driver used by the system has its own directory in /proc/scsi/, which contains files
specific to each SCSI controller using that driver. So, for the example system above, aic7xxx and