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






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