-----------------------------------------------------------------------

                /proc          
-----------------------------------------------------------------------
/proc/sys      Terrehon Bowden <terrehon@wpi.com>       January 27 1999
               Bodo Bauer <bb@ricochet.net>                
-----------------------------------------------------------------------
Version 1.1                                         Kernel version 2.2
-----------------------------------------------------------------------
Contents

1   Ϥ/ռ

1.1  ˡŪ

2   /proc ե륷ƥ

2.1  ץȤΥ֥ǥ쥯ȥ
2.2  ͥǡ
2.3  /proc/ide  IDE ǥХ
2.4  /proc/net Υͥåȥ
2.5  SCSI 
2.6  /poc/parport ΥѥݡȾ
2.7  /proc/tty  TTY 

3   ͥѥ᡼μѹ

3.1  /proc/sys/debug  /proc/sys/proc
3.2  /proc/sys/fs - ե륷ƥࡦǡ
3.3  /proc/sys/fs/binfmt_misc - ¾ΥХʥեޥå
3.4  /proc/sys/kernel - Ūʥͥѥ᡼
3.5  /proc/sys/vm - ۥꡦ֥ƥ
3.6  /proc/sys/dev - ǥХͭΥѥ᡼
3.7  /proc/sys/sunrpc - ⡼ȡץ㡦(RPC)
3.8  /proc/sys/net - ͥåȥϢ
3.9  /proc/sys/net/ipv4 - IPV4 
3.10  Appletalk
3.11  IPX

-----------------------------------------------------------------------

1   Ϥ/ռ

ʸϤ IDG Books ޤʤǤ SuSE Linux distribution 
ܤΰǤ/proc ե륷ƥˤĤŪʸϤʤ
ᡢ䤿ϼͳǤ¿ʸϤ򸵤ˤξϤ򵭽Ҥޤ
Ǥ̤ Linux  ߥ˥ƥ˴Ը뤳Ȥʿȹͤޤ
ʸϤ 2.1.132  2.2.0-pre СΥͥ˴ŤƤޤ
ȤˤϤۤɱ󤤤ΤǤϤʤȹͤƤޤΩĤȤ
ԤƤޤ䤿Τ¤ꤳ  /proc ե륷ƥˤĤ
Ū˰äǽʸǤ ʸ Intel x86 ϡɥ˾
ƤƤޤPPCARMSPARCAPX ħˤĤõƤȤ顢 
֤󸫤Ĥ뤳ȤǤʤǤ礦ޤ IPv4 ͥåȥˤĤƤ
߰äƤޤIPv6 ¾ΥץȥϰäƤޤ󡣤ʤ

䤿 Alan Cox, Rik van Riel, Alexey Kuznetsov ˴դȻפ
ˤʸκˤä Andi Kleen ʸ礤˻ͤˤ
ޤɲäξ󶡤Ƥ줿Ȥ碌̤ʴդ򤷤
Ȼפޤ  Linux ͥˤĤƥɥȤ˴Ϳ
줿եȥΰʤҤκ˱줿Ƥ˴
ޤ

ɤΤ褦ʥȡ/ɲäǤ⤢ޤ顢鷺 Bodo Bauer
(mail: bb@ricochet.net) ޤϢ䤿ϴǤʸɲ
ĺޤ

()  ʸܸؤ JF ץȤΥͥɥ
ΰȤơֹ⿮ <hanataka@abyss.rim.or.jp> ¼߰
<nomura@np.bs1.fc.nec.co.jp> Ԥޤ ʸ˺ݤƥ
Х򤷤Ƥ줿 JF Фˤξڤƴդ򤷤Ȼפޤ
ΤФ餷ʸθԤǤꡢܸؤۤ
줿 Bodo Bauer <bb@ricochet.net> ˴դ򤷤ޤ

ʸκǿǤ http://www.suse.com/~bb/Docs/proc.html  HTML
ASCII, Postscript ǽǤ

Ǥϰʲ URL  JF ץȤΰȤǤޤ
http://www.linux.or.jp/JF/ õƤ

1.1  ˡŪ

䤿ϤʸΤݾڤޤ󡣤ʸϤΤäˤ
ʤΥƥब˲줿Ȼ䤿˶äƤȤƤ⡢䤿
Ǥ餤ޤ

()  ܸǤԤۼԤʸΤˤĤƲݾ
Ԥޤ󡣤ǤΤ褦ϤƤޤɼԤΩ
ȤԤۤԤäƤޤǽŪˤʸɼԤǤˤƤ
Ѥ ޤ linux Ͼ˿ʲƤꡢǴѹ줿
̵ˤʤäʬ¸ߤޤޤơΤޤ
Ȥ򤢤餫ᤴΤ

-----------------------------------------------------------------------

2   /proc ե륷ƥ

proc  ե륷ƥϥͥΥǡ¤ΤΥ󥿡ե
Ưޤƥ˴ؤꤷꡢưƤ륫ͥΥ
᡼ĴΤ˻ѤǤޤޤΥƥäƤץ
줾Фơץ ID (PID) ̾Ĥ֥ǥ쥯ȥ
ޤǤޤ self Ȥ󥯤 proc ե륷ƥɤǤ
ؤƤޤ

2.1  ץȤΥ֥ǥ쥯ȥ

ƥץΥ֥ǥ쥯ȥˤɽ 1.1 Τ褦ʹܤޤ

       _________________________________________________________
       cmdline  ޥɥ饤
       environ  Ķѿ
       fd       ƤΥեǥץޤǥ쥯ȥ
       mem      ΥץݻƤ
       stat     ץξ
       status   ʹ֤ɤΥץξ
       cwd      ץθߤκȥǥ쥯ȥؤΥ
       exe      Υץμ¹ԷؤΥ
       maps     ꡦޥå
       root     ΥץΥ롼ȡǥ쥯ȥؤΥ
       statm    ץΥ֤ˤĤƤξ
       __________________________________________________________
       ɽ 1.1: /proc ˤץȤι

: ץξ֤ˤĤƤξˤ /proc/PID/status Ȥե
    ɤǲǽǤ
> cat /proc/self/status

Name:   cat
State:  R (running)
Pid:    5633
PPid:   5609
Uid:    501     501     501     501
Gid:    100     100     100     100
Groups: 100 16 
VmSize:      804 kB
VmLck:         0 kB
VmRSS:       344 kB
VmData:       68 kB
VmStk:        20 kB
VmExe:        12 kB
VmLib:       660 kB
SigPnd: 0000000000000000
SigBlk: 0000000000000000
SigIgn: 0000000000000000
SigCgt: 0000000000000000
CapInh: 00000000fffffeff
CapPrm: 0000000000000000
CapEff: 0000000000000000

 ps ޥɤˤäƸ뤳ȤǤΤȤۤȤƱ򼨤
ޤº ps Ϥξ proc ե륷ƥफƤޤ

statm եˤϥץλѤƤˤĤƤΤܤ
ޤƤϰʲΤ褦ʰ̣μĤͤǤ

size       ץιץ
resident   ˤʬΥ
shared     ͭƤڡ
trs        ɤΥڡ
drs        ǡ/åΥڡ
lrs        饤֥Υڡ
dt         줿(dirty)ڡ

ƥ/ǡ/饤֥γȯŪʼˡˤäƼͤ
ޤ

2.2  ͥǡ

ץιܤƱͤˡäƤ륫ͥˤĤƤξͿƤ
ե뤬¸ߤޤ ξΤ˻Ѥե /proc ľ
¸ߤޤɽ 1.2 ˼ޤ ΥեƤʤ
Υƥ¸ߤƤ櫓ǤϤޤ󡣤ɤΥե뤬¸ߤɤ
ե뤬¸ߤʤϥͥΥե졼ɤ
⥸塼˰¸Ƥޤ

      _________________________________________________________
      apm           APM (Advanced power management) 
      cmdline       ͥΥޥɥ饤
      cpuinfo       CPU ˤĤƤξ
      devices       ѤǤ(֥åȥ饯)ǥХ
      dma            DMA ͥ
      filesystems   ݡȤƤե륷ƥ
      interrupts    ߤλѾ
      ioports       I/O ݡȤλѾ
      kcore         ͥΥ(core)Υ᡼
      kmsg          ͥΥå
      ksyms         ͥΥܥ롦ơ֥
      loadavg       ɡ٥졼
      locks         ͥ롦å
      meminfo       
      misc          ¿ʾ
      modules       ɤƤ⥸塼Υꥹ
      mounts        ޥȤƤե륷ƥ
      partitions    ƥबǧƤѡƥ
      rtc           ꥢ롦ࡦå
      slabinfo      Slab pool ξ
      stat          ̤ͥ׾
      swaps         å׶֤λѾ
      uptime        ƥλѻ(uptime)
      version       ͥΥС
      _________________________________________________________
           ɽ 1.2: /proc Υͥ

: ߤɤγߤѤƤ뤫ޤ줬Ū˻Ѥ
    Ƥ뤫 /proc/intterupts Ĵ٤뤳ȤǥåǤޤ

> cat /proc/interrupts
           CPU0       
  0:    8728810          XT-PIC  timer
  1:        895          XT-PIC  keyboard
  2:          0          XT-PIC  cascade
  3:     531695          XT-PIC  aha152x
  4:    2014133          XT-PIC  serial
  5:      44401          XT-PIC  pcnet_cs
  8:          2          XT-PIC  rtc
 11:          8          XT-PIC  i82365
 12:     182918          XT-PIC  PS/2 Mouse
 13:          1          XT-PIC  fpu
 14:    1232265          XT-PIC  ide0
 15:          7          XT-PIC  ide1
NMI:          0

/proc ˤϤפʻĤΥ֥ǥ쥯ȥ scsinetsys ¸ߤޤ
Ūʥ롼ȤơΥǥ쥯ȥƤǥ쥯ȥꤽΤ
¸ߤǤͥ˰¸Ƥޤ SCSI ͭˤʤäƤʤ
Сscsi ǥ쥯ȥ¸ߤʤǤ礦 net ˤĤƤƱͤǡ
Υͥ뤬ͥåȥ򥵥ݡȤƤˤΤ¸ߤޤ

slabinfo ե  slab ٥ˤѾξͿޤ
Linux С 2.2 Ǥϥڡ٥ʾΥˤ slab pool 
Ѥޤ̤˻Ѥ륪֥ (ͥåȥХåեǥ
ȥꥭåʤ) Ϥ鼫Ȥ slab pool äƤޤ

2.3  /proc/ide  IDE ǥХ

Υ֥ǥ쥯ȥˤϥͥ뤬ǧƤƤ  IDE ǥХˤ
Ƥξ󤬴ޤޤƤޤ줾ΥǥХ(㤨Хϡɥǥ)
Ȥ˰ĤΥ֥ǥ쥯ȥ꤬¸ߤʲΥեޤǤޤ:

       cache             å
       capacity          ǥ
       driver            ɥ饤ФȤΥС
       geometry          ʪȥȥ
       identify          ǥХ̥֥å
       media             ǥη
       model             ǥХμ̻
       settings          ǥХ
       smart_thresholds  IDE ǥ
       smart_values      IDE ǥ

2.4  /proc/net Υͥåȥ

Υǥ쥯ȥϰŪʷ˽ ɽ 1.3 Τ褦ʥեޤ
ޤ

     ________________________________________________________________
     arp             ͥ ARP ơ֥
     dev             ͥåȥǥХȤ׾
     dev_mcast       ǥХ listen Ƥ layer 2 ޥ㥹
                     롼(󥿡եֹ桢٥롢ȿ
                     bind Ƥ륢ɥ쥹ο)
     dev_stat        ͥåȥǥХξ
     ip_fwchains     ե롦Ϣ
     ip_fwnames      ե롦̾
     ip_masq         ޥ졼ɥơ֥ޤǥ쥯ȥ
     ip_masquerade   פʥޥ졼ɥơ֥
     netstat         ͥåȥ
     raw             (raw)ΥǥХ
     route           ͥ롦롼ƥ󥰡ơ֥
     rpc             RPC ޤǥ쥯ȥ
     rt_cache        롼ƥ󥰡å
     snmp            SNMP ǡ
     sockstat        å
     tcp             TCP å
     tr_rif          ȡ󡦥 RIF 롼ƥ󥰥ơ֥
     udp             UDP å
     unix            UNIX ɥᥤ󥽥å
     wireless        磻쥹󥿡եΥǡ(Wavelan ʤ)
     igmp            äƤ IP ޥ㥹ȡɥ쥹
     psched          Х롦ѥåȡ塼Υѥ᡼
     netlink         PF_NETLINK åȤΥꥹ
     ip_mr_vifs      ޥ㥹Ȳۥ󥿡եΥꥹ
     ip_mr_cache     ޥ㥹ȡ롼ƥ󥰡åΥꥹ
     udp6            UDP å (IPv6)
     tcp6            TCP å (IPv6)
     raw6            (raw)ǥХ (IPv6)
     igmp6           äƤ IP ޥ㥹ȡɥ쥹(IPv6)
     if_inet6        IPv6 󥿡եɥ쥹Υꥹ
     ipv6_route      IPv6 ΤΥͥ롦롼ƥ󥰡ơ֥
     rt6_stats       Х IPv6 롼ƥ󥰡ơ֥
     sockstat6       å (IPv6)
     snmp6           SNMP ǡ (IPv6)
     ________________________________________________________________
         ɽ 1.3: /proc/net Υͥåȥ

ξѤơƥѲǽʥͥåȥǥХˤĤ
ξȡΥǥХ˥롼ƥ󥰤줿ȥեå̤Τ뤳Ȥ
Ǥޤ

> 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

2.5  SCSI 

⤷ƥ SCSI ۥȡץСΥץб
饤Фˤʤ̾Υ֥ǥ쥯ȥ /proc/scsi ʲ˸Ĥ뤳
ǤޤǧƤƤ SCSI ǥХΥꥹȤ
/proc/scsi/scsi ˸Ĥ뤳ȤǤޤ

>cat /proc/scsi/scsi
Attached devices: 
Host: scsi0 Channel: 00 Id: 00 Lun: 00
  Vendor: QUANTUM  Model: XP34550W         Rev: LXY4
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 01 Lun: 00
  Vendor: SEAGATE  Model: ST34501W         Rev: 0018
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 02 Lun: 00
  Vendor: SEAGATE  Model: ST34501W         Rev: 0017
  Type:   Direct-Access                    ANSI SCSI revision: 02
Host: scsi0 Channel: 00 Id: 04 Lun: 00
  Vendor: ARCHIVE  Model: Python 04106-XXX Rev: 703b
  Type:   Sequential-Access                ANSI SCSI revision: 02

ɥ饤Ф̾Υǥ쥯ȥˤϤΥƥǸĤäץȤ
ĤΥե뤬ޤΥեϤΥȥˤĤƤ
󡢻ѤƤ IRQ  I/O ɥ쥹ϰϤʤɤξޤǤޤ

>cat /proc/scsi/ncr53c8xx/0
General information:
 Chip NCR53C875, device id 0xf, revision id 0x4
 IO port address 0xec00, IRQ number 11
 Synchronous period factor 12, max commands per lun 4

2.6  /proc/parport ΥѥݡȾ

/proc/parport ǥ쥯ȥϥƥΥѥݡȤˤĤƤξ
ǤޤݡȤȤ˰ĤΥ֥ǥ쥯ȥ꤬¸ߤݡֹ
(0,1,2, ...) ˴Ť̾ĤƤޤ

Υǥ쥯ȥϰʲΥեޤǤޤ:

    autoprobe   ΥݡȤμưФη
    devices     ³ƤǥХ⥸塼
    hardware    ϡɥ(ݡȤη, I/O ݡ, DMA, IRQ, ʤ)
    irq         ѤƤ(⤷)

2.7  /proc/tty  TTY 

Ѳǽʤޤϻ tty ˤĤƤξ /proc/tty ˸Ĥ뤳
Ǥޤʲɽˤ褦ʥɥ饤ФȲ(line descipline) 
ĤƤιܤ򸫤Ĥ뤳ȤǤޤ


     drivers       ɥ饤ФΥꥹȤȤλѾ
     ldiscs        Ͽ줿
     driver/serial Ѿפ 줾 tty ξ

ߤɤ tty ѤƤ뤫ñ /proc/tty/drivers õ
Ĥ뤳ȤǤޤ

>cat /proc/tty/drivers
pty_slave            /dev/pts      136   0-255 pty:slave
pty_master           /dev/ptm      128   0-255 pty:master
pty_slave            /dev/ttyp       3   0-255 pty:slave
pty_master           /dev/pty        2   0-255 pty:master
serial               /dev/cua        5   64-67 serial:callout
serial               /dev/ttyS       4   64-67 serial
/dev/tty0            /dev/tty0       4       0 system:vtmaster
/dev/ptmx            /dev/ptmx       5       2 system
/dev/console         /dev/console    5       1 system:console
/dev/tty             /dev/tty        5       0 system:/dev/tty
unknown              /dev/tty        4    1-63 console

-----------------------------------------------------------------------

3   ͥѥ᡼μѹ

/proc/sys ǥ쥯ȥ /proc Ǥä˶̣ʬǤ Ͼ
󶡤ǤʤͥΥѥ᡼ѹ뤳Ȥǽ
ޤƤߤݤˤϽʬդƤϥƥŬ
뤳ȤǤޤƱͤ˥å夵뤳ȤǤޤӥ
󶡤Ƥ륷ƥΥͥѥ᡼ͷǤϤޤ󡣳ȯޥ
ƥƥȤԤȤƤ뤳ȤƵǽ뤳Ȥǧ
٤Ǥ顼ȯȥޥ֡Ȥ뤷ʤ⤢


ͤѹˤϡñ˿ͤե˽񤭹ǤΥե
륷ƥࡦǡΥ㤬ޤѹԤˤ root ˤ
ɬפޤʬѤΥ֡ȥץȤơƥư
뤿Ӥ˽񤭹褦ˤ뤳ȤǤޤ

/proc/sys ľˤե  Linux ͥưˤƻ¿ʰ
ŪʤȤƻ뤷ĴꤹΤ˻ѤޤĤΥե
ѹϥƥ˲Τ褦ʻפ̷̤򾷤Ȥ뤿ᡢº
ѹ˥ɥȤȥͥΥξ褯ɤळȤ򤪴
ᤷޤɤΤ褦ʾǤ⡢Υե˲񤭹ˤϽʬ
տԤäƤ/proc ιܤ 2.1.*  2.2 ͥδ֤
ѹˤʤäƤ뤫⤷ޤ󡣲䤬ˤϥͥΥ
Ȥ褯ľƤ /usr/src/linux/Documentation/sys ǥ
쥯ȥ˥ɥȤ򸫤Ĥ뤳ȤǤǤ礦 ξϤ 2.2 
ͥ˴ޤޤʸϤ˴𤤤Ƥʬʤꤢޤξ
󶡤Ф Rick van Riel ˴դޤ

3.1  /proc/sys/debug  /proc/sys/proc

ĤΥǥ쥯ȥ϶Ǥ

3.2  /proc/sys/fs - ե륷ƥࡦǡ

Υ֥ǥ쥯ȥΥե륷ƥࡢեϥɥ롢inode
dentryˤĤƤξޤǤޤ

ߡ/proc/sys/fs ˤϰʲΥե뤬ޤ:

dentry-state
   ǥ쥯ȥꥭåξ֡ǥ쥯ȥꡦȥưŪ˳
   줿줿ꤹΤǡΥեϸߤξ֤ˤĤƤ
   ͿޤΥե 6ĤͤݻƤơǸĤ
   ѤƤ餺˥Ǥ¾λͤĤΰ̣:

       nr_dentry   ˥˸ޤ
       nr_unused   ѤƤʤå奨ȥο
       age_limit   ꤬­ʤ˥ȥ꤬ƺ
                   ñ̤μ̿
       want_pages  ǡ

dquot-nr  dquot-max
   dquot-max եϥå夷Ƥǥȥ
   κͤ򼨤Ƥޤ

   dquot-nr  եϥǥȥγݺѤߤͤ
   ǥȥ򼨤Ƥޤ
   
   ⤷å夵Ƥǥζ̤˾ʤ
   ¿Υ桼Ʊ˻Ѥ褦ʾϡ¤夲ɤ
   礦

file-nr  file-max
   ͥưŪ˥եϥɥݤޤ뤳
   ȤϤޤ

   file-max ͤ Linux ͥ뤬Ƥ뤳ȤǤե
   ɥκ򼨤ޤ⤷եϥɥ뤬­ʤȤ
   顼å¿Фˤϡξ¤夲ɤǤ
   ͤΥǥեȤ 4096 ǤѹˤñˤΥե
   ˿񤭹Ǥ:

   # cat /proc/sys/fs/file-max
   4096
   # echo 8192 > /proc/sys/fs/file-max
   # cat /proc/sys/fs/file-max
   8192

   ñ˿ͤ echo бե˽񤭹Ȥ
   ˡϡͥƤѹǽʥѥ᡼ФͭǤ

   file-nr λĤͤϡƺѤߤΥեϥɥο
   Υեϥɥοեϥɥκ򼨤Ƥޤ
   ƺѤߤΥեϥɥοͶ᤯ˤʤäƤƤº
   ˻οʬ˾Сեϥɥλ̤Υԡ
   οƤǤ顢ͤ䤹ɬפϤޤ

   ǡʳ˥ץȤ˥ץǤեκ
   ¸ߤޤǰʤȤˡϤñˤѹǤޤ󡣤
   ͤϥǥեȤǤ 1024 ꤵƤꡢѹ뤿
   ˤ /usr/src/linux/include/linux ˤ limits.h  fs.h 
   ѤɬפޤNR_OPEN ѹƥͥƥ
   뤷Ƥ

inode-state, inode-nr and inode-max
   եϥɥƱͤ˥ͥ  inode ¤ΤưŪ˳ݤ
   뤳ȤϤޤ

   inode-max ͤ inode ϥɥκ򼨤Ƥޤ ͤ
   file-max λܤܰʾ礭Ǥ٤Ǥ ʤʤС
   ɸ, ɸ, ͥåȥåȤʤɤ򰷤ˤƱ
    inode ¤Τɬפˤʤ뤫Ǥ⤷Ū inode ͤ­
   ʤ褦ʤФͤ䤷Ƥ

   inode-nr ե inode-state κǽĤͤޤǤޤ
   Ǥ餳ΥեϾάޤ

   inode-state ϻĤͭͤȻͤĤΥߡͤޤǤޤͭ
   ͤϽ nr_inode, nr_free_inodes, preshrink Ǥ

   nr_inodes 
     ƥबƺѤߤ inode ο򼨤ޤ Linux ϥڡ
     ñ̤ inode Ƥ뤿ᡢͤ inode-max ͤ
     㴳礭ʤ뤳Ȥޤ

   nr_free_inodes 
     Ƥ inode 򼨤Ƥޤ nr_inodes > inode-max 
     ƥबʾ inode Ƥ inode ꥹȤ
     ʤФʤʤˤ pre shrink ʳˤʤޤ

super-nr  super-max
   ƱͥưŪ˳Ƥ륹ѡ֥å¤Τǡ
   뤳ȤϤޤsuper-max եϥѡ֥å
   ϥɥκǼƤޤ super-nr ϸ߳Ƥ
   Ǥ

   ƤΥޥȤ줿ե륷ƥϥѡ֥åɬפǤ
   ¿ե륷ƥޥȤ褦ȤˤϤ
   ͤ䤷ɤǤ礦

3.3  /proc/sys/fs/binfmt_misc - ¾ΥХʥեޥå

Υե¾ /proc/sys/fs/binfmt_misc ֥ǥ쥯ȥ꤬¸
ޤϥͥ뤬ݡȤƤ뤽¾ΥХʥեޥåȤ
ޤ

binfmt_misc ϥ⥸塼ɲäꥫͥ򥳥ѥ뤷ʤꤹ
뤳Ȥʤ˿ʥХʥեޥåȤϿ뤳Ȥǽˤޤ
Ԥˤ  binfmt_misc ϥХʥƬΥޥåʥС
ʥΥե̾γĥҤΤäƤɬפޤ

εǽϹ¤ΤΥ󥯥ɡꥹȤǴƤꡢХʥեޥ
ȤΥޥåȤΥ(ޤϥե̾γĥ)եåȡޥ
󥿥ץ꥿̾ޤǤޤΥХʥư褦׵ᤵ
ϡθΥץ̾ȤơͿ줿󥿥ץ꥿
ưޤ  binfmt_java, binfmt_em86, binfmt_mz Ʊͤư
binfmt_misc ϥǥեȤǤϲϿƤޤ󡣼ʬɲäΥ
ʥեޥåȤϿɬפޤ

binfmt_misc ˤĤΰŪʥեȡϿ줿եޥåȤȤ
ĤΥե뤬ޤĤŪʥե register  status 
Ǥ

ХʥեޥåȤϿˤϰʲΤ褦ˤޤ

echo :̾::եå:ޥå:ޥ:󥿡ץ꥿: \
                                   > /proc/sys/fs/binfmt_misc/register 

ǡŬڤ̾(name: /proc ǥ쥯ȥΥȥ˻Ѥޤ)
եå(offset: άȥǥեȤ 0)ޥå(magic) ȥޥ
(mask: άǤǥեȤ 0xff) ƺǸ˴οεư
륤󥿥ץ꥿(interpreter 㤨ХƥѤ '/bin/echo')ꤹɬ
ޤ ̾ΥޥåˤȽ̤ѤϷ(type)  M
ե̾γĥҤˤȽ̤ѤˤϷ(type)  E  (ĥ
 magic ΰ֤)ꤷޤ

Хʥեޥåȡϥɥξ֤åꥻåȤˤ:

/proc/sys/fs/binfmt_misc/status ե cat Сbinfmt_misc 
ߤξ(ͭ/̵)Ǥޤ ֤ѹ뤿ˤ 0 (̵)
ޤ 1 (ͭ) ޤ -1 (ٹ: ϴϿƤΤƥ
ꥢޤ)  status  echo ޤ㤨 echo 0 > status Ȥ
binfmt_misc (Ū)̵ˤޤ

ġΥϥɥξ

줾Ͽ줿ϥɥ /proc/sys/fs/binfmt_misc ˥ȥ
ޤΥե status Ʊͤεǽޤγ
ХʥեޥåȤˤΤߺѤޤ Υե cat 뤳Ȥ
äơbinfmt  󥿥ץ꥿ޥåˤĤơϢƤ
뤳ȤǤޤ

binfmt_misc λ (binfmt_java 򥨥ߥ졼)

cd /proc/sys/fs/binfmt_misc
echo ':Java:M::\xca\xfe\xba\xbe::/usr/local/java/bin/javawrapper:' > register
echo ':HTML:E::html::/usr/local/java/bin/appletviewer:' > register
echo ':Applet:M::<!--applet::/usr/local/java/bin/appletviewer:' > register
echo ':DEXE:M::\x0eDEX::/usr/bin/dosexec:' > register

λĤιԤ Java ¹Է Java ץåȤΥݡȤɲä
(binfmt_java ƱͤǤƤΥץåȥե <!--applet> 
񤫤ʤƤ⤹褦 .html ĥҤɲäޤ)  JDK ȥ륹
ץȤ /usr/local/java/bin/javawarpper  ⥤󥹥ȡ뤹ɬפ
ΥץȤ Java Υե̾ΰ򤷤ޤ  Java
ХʥäˤϡѥΤɤ˥饹եؤΥ󥯤
Ǥ

3.4  /proc/sys/kernel - ̤ͥΥѥ᡼

Υǥ쥯ȥϥͥŪưȿǤƤޤˤ٤
褦ƤϥͥΥե졼˰¸ƤޤǤ
ʥեΤĤˤĤơ줬̣ɤΤ褦ˤѤ
뤫ޤ

acct
   եϻĤ highwaterlowwaterfrequency ޤǤޤ

     BSD Υץƥ󥰤ͭˤʤäƤ
   ˤΤ¸ߤޤͤϤư椷ޤ⤷
   񤭹Ǥե륷ƥλĤ̤ lowwater % ʲˤʤ
   ȥȤϰߤ졢higtwater % ʾˤʤä饢
   Ƴޤfrequency ϶̤ɤ٤٤ǥå
   뤫(ñ̤)ꤷޤǥեȤ 4230 Ǥ
   ͤȶ̤ 2% ʲˤʤȥȤߤ졢 4% ʾ
   ˤʤȺƳޤ̤ˤĤƤξ 30 äȤ˳ǧ
   ޤ

ctrl-alt-del
   Υեͤ 0 ʤСctrl-alt-del ϥȥåפơ
   ˥ꥻåȤԤ褦  init(1) ץޤͤ
   0 礭СΥ򲡤Ȥˤ Linux  Ϥ˥֡
   ȤԤ줿(dirty)Хåե sync ϹԤޤ

   : (dosemu Τ褦)ץबܡɤ(raw)⡼ɤ
   ꤷƤˤϡcrtl-alt-del ϥͥ tty ؤϤ˥
   ˤäƲᤵޤƤɤΤ褦ư뤫ϤΥ
   बꤷޤ

domainname  hostname
   Υեϥޥ NIS Υɥᥤ̾ȥۥ̾椷
   Ū̾ darkstar.frop.org ʤñ:

   # echo "darkstar" > /proc/sys/kernel/hostname
   # echo "frop.org" > /proc/sys/kernel/domainname

   Ȥ뤳Ȥǡۥ̾ NIS ɥᥤ꤬̾Ǥޤ

osrelease, ostype, version

   ̾ΰ̣̤ǡϰʲƤޤǤޤ:

   >cat /proc/sys/kernel/osrelease
   2.1.131
   >cat /proc/sys/kernel/ostype
   Linux
   >cat /proc/sys/kernel/version
   #8 Mon Jan 25 19:45:02 PST 1999
 
   osrelease ե ostype ե餫Ǥ礦version 
   Ͼɬפ⤷ޤ#8 ȤΤϤΥ 8 
   ܤ˥ѥ뤵줿ͥǤ뤳Ȥ̣³դϥ
   ͥ뤬ۤ줿֤򼨤ޤͤѹˤϥͥ
   ƹۤ뤷ޤ

panic 
   Υեͤ  panic ֡ȤޤǤ˥ͥ뤬Ԥ
   򼨤Ƥޤեȥˤ watchdog Ѥϡ
   60 ꤹ뤳Ȥ侩ޤ⤷ 0 ꤹȥͥ뤬
   panic μư֡Ȥ̵ˤޤ줬ǥեȤ
   Ǥ

printk
   printk λͤĤͤϤ줾 console_loglevel,
   default_message_loglevel, minimum_console_level,
   default_console_loglevel 򼨤Ƥޤ

   ͤϥͥΥ顼åϤ
   ˵Ͽꤹ printk() ư˱ƶޤ줾Υ
   ˴ؤܤ syslog(2) 򻲾ȤƤ

   console_loglevel
     ͥ٤⤤åϥ󥽡ɽޤ

   default_message_level
     ͥ٤ƤʤåϤͥ٤ɽޤ

   minimum_console_loglevel
     console_loglevel ǤǾ(ͥ٤Ǥ⤤)ͤǤ

   default_console_loglevel
     console_loglevel ΥǥեȤͤǤ

sg-big-buff
   Υե SCSI (sg)Хåե礭򼨤Ƥޤ
   ǤϤޤͤѹ뤳ȤϤǤޤ󤬡ͥ򥳥
   뤹 include/scsi/sg.h  SG_BIG_BUFF ͤ뤳
   ˤäƽǤޤ

   ⤷ SANE (Scanner Access now easy) ΥʤѤˤ
   ͤ⤯ꤷʤ뤫⤷ޤ󡣤路 SANE 
   ޥ˥奢򸫤Ƥ

modprobe
   modprobe ΥХʥ꤬Ǥ ͥ뤬⥸塼򥪥
   ޥɥɤˤͿ줿ץѤޤ

3.5  /proc/sys/vm - ۥꡦ֥ƥ

Υǥ쥯ȥˤϤե Linux ͥβۥ
(VM:Virtual Memory) ֥ƥεǽĴ˻Ѥ뤳ȤǤ
ˡbdflush եϥǥλ̤ˤ⾯ƶޤ

bdflush
   Υե bdflush ͥ롦ǡεǽ椷ޤ 
   եϸߤΤȤ 9 ĤͤޤǤꡢΤ 6 Ĥ
    ͥˤäƼºݤ˻ѤƤޤ

     nfract     줿ХåեåΥѡơ
                ˤʤä bdflush ޤ
     ndirty     Υǽ񤭹ߤ»ܤǤ֥å
     nrefill    refill  ƤӽФ٤˼褦ȤƤ
                (clean)Хåեο
     nref_dirt  Хåե refill ߤ褦Ȥ˱줿Хåե
                οͤĶƤ bdflushޤ
     dummy      ̤
     age_buffer ̾Хåեեå夹ޤǤλ
     age_super  ѡ֥åեå夹ޤǤλ
     dummy      ̤
     dummy      ̤

   nfract
     Υѥ᡼ϥХåեåα줿Хåեκ
     椷ޤֱ줿פȤϥХåեƤǥ˽
     ɬפ뤳Ȥ̣ޤ (ȿФˡʡץХåե
     ˺ƤޤäƤ⹽ޤ) 礭ͤꤹ
       Linux ϥǥؤν񤭹ߤĹ٤餻뤳ȤǤ
     Ȥˤʤޤϥ꤬­ʤʤä˰٤
     ̤ I/O ȯ뤳Ȥ̣ޤ ͤˤȤ
     ˤ˥ǥؤν񤭹ߤԤǥ I/OʿѲޤ

   ndirty
     ndirty  bdflush ٤˥ǥ˽񤭹ळȤǤ
     Хåեκ򼨤ޤ礭ͤϡ٤餻ư٤ I/O
     ԤȤ̣ޤ Ǿͤˤ bdflush 
     ʬ٤ǸƤӽФʤХ­򵯤Ȥˤʤޤ

   nrefill
     ͤ refill_freelist() ƤӽФ줿 bdflush 
     ХåեΥꥹȤɲä٤Хåեο򼨤ƤޤХ
     եϤФХڡȤϰۤʤä礭ǤꡢäƲ
     餫Ͽ򤹤ɬפΤǡ餫Хåեݤ
     ȤɬפǤͤ礭礭ۤɡ¿Υ꤬ϲ
     졢refill_freelist() ¹Ԥ٤Ͼʤʤޤ

   nref_dirt
     refill_freelist()Ԥ nref_dirt ¿α줿Хåե
      bdflush ¹Ԥޤ

   age_buffer  age_super
     Ǹ age_buffer  age_super  Linux 줿Хåեե
     ˽񤭹ޤǤκ֤Ϳޤͤ jiffy (å
     ) ɽ졢1 ä 100 jiffy Ǥage_buffer ϥǡ
     ֥åκ֤ǡage_super ϥե륷ƥΥ᥿ǡ
     κ֤Ǥ

buffermem
   ΥեλĤͤϥХåե˻Ѥ̤
   椷ޤѡơϥƥ˷׻ޤ

   ͤ:

   min_percent
     ͤϥХåե˾񤹤٤κѡơ
     Ǥ

   borrow_percent
     Linux Υ꤬­ʤʤä˥Хåե㥷ˤͰ
     ΥƤƤ硢(MM: Memory Management)
     ֥ƥ¾Ū˻ѤƤ뤿ˡ
     ХåեåΥѶŪڤͤޤ

   max_percent
     ͤϥХåեå˳Ƥ뤳ȤǤκ
     Ǥ

freepages
   ΥեϻĤͤޤǤޤ: min, low, high:

   min
     ƥζڡοͤãϡͥʳ
     ʾΥƤ뤳ȤǤʤʤޤ

   low
     ڡοͰʲˤʤäǡͥѶŪ
     åפ򳫻Ϥޤ

   high
     ͥϤοʾΥ˶֤ݤȤȻߤ
     ꤬ͤ꾯ʤʤäǡͥϴˤ䤫
     åפ򳫻ϤºݤѶŪʥåפ򤷤ʤƤळȤ
     Ԥޤ

kswapd
   kswapd ϥͥ롦åץȡǡǤkswapd ϥ
   ΰǡҲդˤʤäꤷˡ
   ޤ줾ΥƥϰۤʤäƤΤǡƥΤ
   ǽĴʤǤ礦

   ΥեϻĤοޤߤޤ
   tries_base
     kswapd  ٤˲褦ȤκϤοͤ
     ׻ޤƤϤͤ 4  8 (mm/vmscan.c 򻲾)
     ǽΤǡܤۤ礭Ϥޤ

     swap νФӰ徺ˤϡ ͤ
     ɤǤ礦

   tries_min
      kswapd ƤӽФ٤˥ڡ褦Ȼߤ
     βǤοͤ¸ߤΤ kswapd ͥ٤
     ƤӽФ줿ȤƤ⤢٤Υڡ뤳Ȥݾڤ
     Ǥ

   swap_cluster
     餯ͤƥǽ˺Ǥ礭ʱƶͿǤ
      swap_cluster  kswapd ˽񤭹ڡοǤ
     ͤ礭뤳Ȥˤä kswapd  I/O礭ʲǹԤ
     ǥΥβ򸺤餷ޤ礭᤮ƤϤ
     ޤ󡣤ޤˤ礭ȥꥯȡ塼դˤʤä
     ޤޤ

overcommit_memory
   ΥեϰĤͤޤǤޤʬ˥꤬뤫Ĵ٤
   ˤϰʲΤ褦ʥ르ꥺबѤޤ: overcommit_memory
   ͤʤС˽ʬʥ꤬Ȳꤷޤ
   ǽǡץϤФƵʥ malloc() 
   ޤ̤ϤΤΰʬΤߤѤޤ󡣤ͤ 0
   ˤƤȡºݤ˥ƥ˥ץबΤ˽ʬʥ꤬
   äƤ⡢Τ褦ʵ malloc() λߤԤޤ

   ǡεǽͭˤȥ꤬­ʤʤäƥå
   ꡢƥबꤹ⤷ޤ󡣤Ǥ礭ʡ⤷
   ϽפʥФǤϤͤ 0 ꤹɤǤ礦

pagecache
   Υե buffermem ƱǤ ꡦޥåפȥե
   ΰ̥åΤΥγƤ椹ۤʤä
   ޤ

   ٥㤹ͤˤƤϤޤ󡣤Ǥʤȡ
   Ĥ꤬ʤʤäҲʤꤹȡƥϥå
   򵯤Ƥޤޤ

pagetable_cache
   ͥϥץåȤ˥åѰդơĤΥڡ
   ơ֥ݻƤޤ( SMP ƥ礤˽ˤʤ
   ޤ) ץåȤΥå礭 low  high  δ֤
   ʤޤ

   ꤬ʤ CPU ĤΥƥǤϡ̵̤ˤʤ
   ˤͤ 0 ˤƤꤢޤ Υå SMP
   ƥǥͥ롦ΥåɬפȤʤ®ʥڡơ
   ֥ƤԤʤ˻Ѥޤ

   礭ʥƥǤϤΤޤޤ¿ʬʤǤ礦̾Υ
   ƥǤäʤǤ礦(RAM  16MB ʲ)ʥ
   Ǥξͤ 0 ꤷɤǤ礦

swapctl
   Υե 8 ĤѿޤǤޤƤͤ
   kswapd ˤäƻѤޤ

   ǽλͤĤѿ sc_max_page_age, sc_page_advance, sc_page_decline
   sc_page_initial_age   Linux Υڡ̿δ˻Ѥޤ
   ڡ̿ȤϤɤΥڡ褯Ȥ뤫ɤΥڡ
   ʤåץȤǤ뤫ϿˡǤ

   åץ󤵤줿˥ڡϺǽ sc_page_initial_age (ǥե
    3) μ̿ޤΥڡ kswapd ˤäƥ
   줿ˤμ̿ϰʲ˽äƽޤ

   o Ǹ˥󤷤ʹߤ˥ڡѤ줿硢μ̿
     sc_page_advance(ǥե 3)ʬäޤ 
     ͤ sc_max_page_age (ǥեȤ 20) Ǥ

   o Ǥʤ(ĤޤѤƤʤ)ڡμ̿
     sc_page_decline (ǥե 1)ޤ

   ̿ 0 ãڡϥåץȤ뤫⤷ޤ

   λͤĤѿ sc_age_cluster_fract, sc_age_cluster_min,
   sc_pageout_weight, sc_bufferout_weight Ѷ˥⡼ɤλ kswapd
   åץȤڡ˻ѤǤޤ

   sc_age_cluster_fract   kswapd ˤäƤ줾Υץ餤
   ĤΥڡ󤵤뤫׻Τ˻Ѥޤ׻
   ϰʲΤ褦ˤʤޤ

           sc_age_cluster_fract
           -------------------- * 󥵥
                  1024

   ä kswapd ˥ץΤ򥹥󤵤
   sc_age_cluster_fract  1024 ꤹɬפޤkswapd 
   󤹤ڡκǾͤ sc_age_cluster_min Ƥޤ
    kswapd ʥץ⥹󤹤褦ˤޤ

   sc_pageout_weight  sc_bufferout_weight ͤ  kswapd Ĥ
   ڡ/Хåե ΥåץȤ򲿲ߤ뤫椹뤿˻
   Ѥޤ ͤˤäƥ桼ڡȥХåե/å塦
   γ٤ĴǤޤ ⤷ Linux ƥबХåե
   ׵˥åץȤץο¿᤮
   褦ʤСsc_bufferout_weight 䤹 sc_pageout_weight
   򸺤餹ɤǤ礦

3.6  /proc/sys/dev - ǥХͭΥѥ᡼

ΤȤ CDROM ɥ饤ФˤĤƤΤߥݡȤƤޤ ƥ˼
դƤ CD-ROM ɥ饤֤ˤĤƤɤ߹Ѥξե
ߤ¸ߤޤ:

>cat /proc/sys/dev/cdrom/info
CD-ROM information

drive name:           sr0  hdc
drive speed:           0    6
drive # of slots:      1    0
Can close tray:        1    1
Can open tray:         1    1
Can lock tray:         1    1
Can change speed:      1    1
Can select disk:       0    1
Can read multisession: 1    1
Can read MCN:          1    1
Reports media changed: 1    1
Can play audio:        1    1

sr0  hdc ĤΥɥ饤֤¸ߤ뤳Ȥȡεǽ狼ޤ

3.7  /proc/sys/sunrpc - ⡼ȡץ㡦(RPC)

Υǥ쥯ȥϻͤĤΥեޤǤꡢ줾 RPC ؿ NFS
NFSǡRPCNLM ΥǥХå⡼ɤ̵ͭꤷޤǥե
Ȥͤ 0 Ǥ 1 ꤹ뤳ȤǥǥХåǽˤʤ


3.8  /proc/sys/net - ͥåȥϢ

ͥΥͥåȥʬؤΥ󥿡ե /proc/sys/net  ˤ
ޤʲɽˤ¸ߤǽΤƤΥ֥ǥ쥯ȥ򼨤Ƥ
ޤͥΥե졼ˤä¸ߤʤΤ⤢뤫
ޤ

+-------------------------------------------------------------------+
| core     ̥ѥ᡼          |appletalk  Appletalk ץȥ |
| unix     Unix ɥᥤ󡦥å |netrom     NET/ROM              |
| 802      E802 ץȥ         |ax25       AX25                 |
| ethernet ͥåȡץȥ|rose       X.25 PLP           |
| ipv4     IP С 4         |x25        X.25 ץȥ      |
| ipx      IPX                     |token-ring IBM ȡ󡦥 |
| bridge   ֥å                |decnet     DEC net              |
| ipv6     IP С 6         |                                |
+-------------------------------------------------------------------+

Ǥ IP ͥåȥ˾ƤޤAX15X.25DEC Net 
Linux ǤϤοͤѤƤʤΤǡξϤǤϾά
ޤ Appletalk  IPX ˴ؤƤ 3.10  3.11 ˾
󶡤ƤޤΥץȥ˴ؤܤѥ᡼Ƥϥ
饤󡦥ɥȤ䥫ͥΥ򻲾ȤƤǤϾ
ɽΤμפʥ֥ǥ쥯ȥˤĤޤۤȤɾ
ǥեȤΤޤޤפǡͤѹɬפϤޤ

/proc/sys/net/core - ͥåȥδܥץ

rmem_default
   åȤμХåեΥǥեȤ礭(ñ̤ϥХ)Ǥ

rmem_max
   åȤμХåեκ礭(ñ̤ϥХ)Ǥ

wmem_default
   åȤХåեΥǥեȤ礭(ñ̤ϥХ)Ǥ

wmem_max
   åȤХåեκ礭(ñ̤ϥХ)Ǥ

message_burst  message_cost
   Υѥ᡼ϥͥåȥɤ饫ͥΥ˽񤭹
   ޤå¤ޤϥӥǽԲǽ
   뤿¤ꤷޤ massage_cost 礭Ƚ񤭽Ф
   åϾʤʤޤmessage_burst ϥåΤ
   ԤޤǥեȤǤϷٹå 5
   ä˰¤Ƥޤ

netdev_max_backlog
   󥿡եͥ뤬®˥ѥåȤ
   ˡ¦Υ塼ߤѥåȤκǤ

optmem_max
   åȤȤХåեκ祵Ǥǡɲåǡ
   ä struct cmsghdr ¤Τˤʤޤ

/proc/sys/net/unix - UNIX ɥᥤ󡦥åȤΥѥ᡼

Υ֥ǥ쥯ȥˤϥե뤬Ĥޤϥåȡ
ǥץ˴ޤǤλ֤椷ޤ

3.9  /proc/sys/net/ipv4 - IPV4 

IP С 4 ϸ Unix ΥͥåȥˤƺǤѤƤ
ȥǤ οǯ IP С 6 ֤Ǥ礦
 ΤȤС 4 ¾ɸǡΥͥåȥ
ĶΤۤȤɤǻѤƤޤΥץȥϽפʤΤǡLinux 
ͥ IPv4 ֥ƥư椹륵֥ǥ쥯ȥܤƤ
ޤ

ޤǽ /proc/sys/net/ipv4 ľιܤˤĤƤߤƤߤޤ礦

ICMP 

icmp_echo_ignore_all  icmp_echo_ignore_broadcasts
   (1)ͭ(0)̵Ǥ 줾쥫ͥ뤬Ƥ ICMP ECHO 
   ̵뤹뤫ͥ뤬֥ɥ㥹Ȥޥ㥹ȡ
   쥹ؤ ICMP ECHO ̵뤹뤫ꤷޤ

   ⤷֥ɥ㥹ȡɥ쥹ޥ㥹ȡɥ쥹Ū
   ɥ쥹Ȥ ICMP echo 褦ˤ硢 ʤΥͥ
   ȥ¾ΥۥȤؤΥѥåȡեåǥ󥰤ˤ륵ӥ
   ǽѤ뤫⤷ʤȤդƤ

icmp_destunreach_rate, icmp_echoreply_rate,
icmp_paramprob_rate, icmp_timeexeed_rate
   ŪϤ ICMP ѥåȿθ٤ꤷޤ
   ¤ޤͤꤷˤѥåȤο
    rate/100 ô(Intel ƥξ)˰¤ޤ

IP 

ip_autoconfig
   ƥ IP ꤬ RARPBOOTPDHCP  ʤɵˤäưŪ˹
   ʤ줿ˤ 1 ˤʤޤǤʤ 0 Ǥ

ip_default_ttl
   IPv4 󥿡ե  TTL (ѥåȼ̿)Ǥ ñ˥
   åȤưǤΥۥå׿Ǥ

ip_dynaddr
   󥿡եΥɥ쥹ѹ줿ưŪ˥åȤΥ
   쥹񤭴뵡ǽͭˤޤ IP ɥ쥹ѹ
   ˤʤ륢åס󥿡եʤɤǤ

ip_forward
   󥿡ե֤ IP ѥåȤΥեɤͭޤ̵ˤ
   ޤΥѥ᡼ѹ¾ƤΥѥ᡼ϥǥե
   ˥ꥻåȤޤιܤΥǥեȤϥͥ뤬ۥȤޤ
   롼ɤ˥ե졼󤵤Ƥ뤫ˤäưۤʤ
   

ip_local_port_range
   TCP  UDP  ˤäƥݡȤȤƻѤݡȤ
   ϤǤĤοޤǤƺǽͤϺǤ㤤ݡȤֹ桢
   ܤοϺǤ⤤ݡȤֹǤ ǥեȤǤ 1024-4999
   Ǥ Ψι⤤ƥǤ 32768-61000 ѹ٤⤷
   ޤ

ip_no_pmtu_disc
   ѥ  MTU ǥХ򥪥դˤ뤿ΥХ륹åǤ
   Ȥ̤ˡץꥱ󤫤饽åȤȡ롼ȤȤ˥
   䥪դˤ뤳ȤǤޤ

ip_masq_debug
   IP ޥ졼ɤΥǥХåǽͭ/̵ꤷޤ

IP ե饰ơ

ipfrag_high_trash  ipfrag_low_trash
   IP ե饰Ȥκƹ˻ѤǤκ̤Ǥ ⤷
   Ū˳Ƥ줿꤬ ipfrag_high_thresh ХȤˤʤä顢
   ե饰ȡϥɥ ipfrag_low_thresh ãޤǡ ѥ
   ȤΤƤޤ

ipfrag_time
  IP ե饰Ȥ֤Ƥ֤Ǥ

TCP 

tcp_retrans_collapse
   ĤΥ줿ץ󥿤Τ˥ХХߴݻ뤿
   ΤǤ Τ褦 TCP åΥХ򤹤뤿ˡ
   ˤϤ礭ʥѥåȤ褦˻ߤޤꤹ
   뤳ȤǤεǽ򥪥դˤǤޤ

tcp_keepalive_probes
   ץ饤(keep alive) ꤵ줿 TCP ³ˤơ
   ꤷǧѥåȤäƤʤˤǤ줿
   ȽǤޤ

tcp_keepalive_time
   ץ饤(keep alive)ͭʻˡɤ줯餤٤ǥ
   饤֡å TCP 뤫򼨤ޤ ǥեȤ
   ͤ 2 ֤Ǥ

tcp_syn_retries
   TCP ³Ԥ˺ǽ  SYN ѥåȤκߤ
   255 ʾꤷƤϤޤ󡣤ϳ³ФƤ
   ڤꤷޤ³Ф
   tcp_retries1 ˤäޤ

tcp_sack
   RFC2018 ˤŪǧ(SACK)ͭˤޤ

tcp_timestamps
   RFC1323 줿ॹפͭˤޤ

tcp_stdurg
   TCP ۵ޥݥ(urgent pointer)եɤ̩ RFC793 ˽
   Ʋ᤹褦ˤޤ ǥեȤ BSD ߴβǶ۵ޥݥ
   ϶۵ޥǡľؤƤޤ RFC793 βǤ϶۵ޥǡ
   κǸؤȤˤʤäƤޤΥץͭˤȤ
   ΰ㤤ˤ꤬ФƤ뤫⤷ޤ󡣥ǥեȤǤ̵
   ˤʤäƤޤ

tcp_syncookies
   ͥ뤬  CONFIG_SYNCOOKIES ץդǥѥ뤵Ƥ
   ˤΤ߻ѤǤޤ åȤ SYN ѥ塼줿
    syncookie ޤ ϰŪʡsyn flood פɤ
   ޤǥեȤǤ̵ˤʤäƤޤ

   åѤγǰ뤳ȤդƤ
   syncookies  ꤵ줿Ф٤ˤʤä¦Ͽ
   Ǥ륨顼åȤʤ⤷ʤȤ̣ޤ

tcp_window_scaling
   RFC1323 줿̿ɥΥ󥰤ͭˤޤ

tcp_fin_timeout
   ǽ FIN ôԤĤꤷޤԤäƤ FIN 
   ХåȤ̵Ĥޤ ϸ̩˸ TCP 
   ʤˤϰȿƤޤӥǽɤɬפ
   ʤޤ

tcp_max_ka_probes
   slow timer  ڤ뤴Ȥˡץ饤ָ򲿲뤫򼨤
   ޤСȤɤˤ礭ͤꤷƤϤޤ

tcp_max_syn_backlog
   åȤȤѥ塼ĹǤLinux 2.2  listen(2)  
   ꤵ줿  backlog ͤϴ³åȤѥ塼Τߤ
   ꤷޤ Ͱʾ³׵ˤ Linux ϤΥ
   åȤΤƻϤޤ syncookies ͭˤʤäƤˤϤ
   ǤѥåȤؤֿԤ졢塼κͤϸŪ̵뤵
   

tcp_retries1
   TCP ³׵Фκߤꤷޤ

tcp_retries2
   TCP ѥåȤκߤꤷޤ

󥿡եͭ

/proc/sys/net/ipv4/conf ǥ쥯ȥʲˤϥƥबǧƤ륤
եȤ˰ĤΥ֥ǥ쥯ȥ꤬¸ߤޤ  all Ȥ
̾Υ֥ǥ쥯ȥ꤬¸ߤޤall ֥ǥ쥯ȥѹ
ˤƤΥ󥿡ե˱ƶޤʳΥ֥ǥ쥯
ѹˤϤΥ󥿡եˤΤ߱ƶޤ

ƤΥǥ쥯ȥƱȥޤ:

accept_redirects
   Υåϥͥ뤬 ICMP 쥯ȥå뤫
   ɤꤷޤǥեȤǤϡͥ뤬̾ΥۥȤȤ
   ꤵƤˤ 'yes' ˡ 롼Ȥƥե졼
   󤵤Ƥˤ 'no' ˤʤޤ
   ----------------------------------------------------------------
accept_source_route
   롼ƥɡѥåȤ뤫ݤ뤫ޤ
   ǥեȤϥͥ뤬ɤΤ褦˥ե졼󤵤Ƥ
   ˰¸ 롼ξ 'yes' ˡۥȤξ 'no' ˤʤ
   ޤ

bootp_relay
   ɥ쥹 0.b.c.d ȤʤäƤꡢ 褬ΥۥȤˤʤ
   ƤʤѥåȤʬƤȤƼ뤫ɤ򼨤ޤ
     BOOTP ѥǡ󤬤Τ褦ʥѥåȤž뤳
   Ȥǽˤޤ

   ǥեȤ 'no' Ǥεǽ(ͥС 2.2.0-pre?
   Ǥ)ޤƤޤ

forwarding
   Υ󥿡ե IP եǥ󥰤ͭɤ򼨤
   

log_martians
   Τʤ롼Ȥɥ쥹äѥåȤ򥫡ͥ˽
   Ϥ뤫ɤ򼨤ޤ

mc_forwarding
   ޥ㥹ȤΥ롼ƥ󥰤Ԥ򼨤ޤεǽȤ
   ϡͥ뤬  CONFIG_MROUTE ץդǥѥ뤵Ƥ
   ɬפޤ˥ޥ㥹ȡ롼ƥ󥰡ǡ
   ɬפˤʤޤ

proxy_arp
    ARP Ԥ(1)Ԥʤ(0)򼨤ޤ

rp_filter
   ȯθڤԤɤǻꤷޤ 1 ͭ 0 ̵
   ǤǥեȤǤ̵Ǥ륢ɥ쥹֥
   ɥ㥹ȥɥ쥹εΤФƤϾͭˤʤäƤޤ

   ͥåȥ饤󥿡ͥåȤؤͣηϩȤʤ롼Ǥ
   ͤ 1 ꤹ뤳Ȥǡ եɲäʤ
   ⡢ͥåȥؤ餫ʵιɤޤ (ɥ
   ϵΤǽޤ)

secure_redirects
   ǥեȤΥȥΥꥹȤˤ륲ȥФƤΤ
   ICMP ȤޤǥեȤͭǤ

shared_media
   ⤷ꤵƤʤȡͥϤΥǥХ˷ҤäƤ
   ۤʤä֥ͥåȴ֤ľ̿ǤȤԤޤ
   ǥեȤǤꤵƤޤ

send_redirects
   ¾ΥۥȤؤ ICMP 쥯Ȥ뤫ɤꤷޤ

롼ƥ

/proc/sys/net/ipv4/route  ǥ쥯ȥˤϥ롼ƥ󥰴ϢԤ
ĤΥե뤬ޤޤƤޤ

error_burst  error_cost
   Υѥ᡼ϥ롼ƥ󥰤Υɤ饫ͥ롦˽
   Фٹå¤뤿˻Ѥޤerror_cost
   礭Ƚ񤭽ФåϾʤʤޤ error_burst
   ϥåΤƤݤԤޤǥեȤǤϷٹå
    5 ô֤˰¤Ƥޤ

flush
   Υե˽񤭹ȥ롼ƥ󥰡åեå夷
   

gc_elastic, gc_interval, gc_min_interval, gc_tresh, gc_timeout
   롼ƥ󥰡åΥ٥å쥯٤ư
   椹ͤǤ

max_size
   롼ƥ󥰡åκ祵Ǥå夬Υ
   ãϡŤȥ˴ޤ

max_delay, min_delay
   롼ƥ󥰡å夬եå夵ޤǤλ֤Ǥ

redirect_load, redirect_number
   ΥۥȤФ ICMP 쥯Ȥ¿٤
   뤿ΰҤǤ(load)쥯Ȥοǻꤷ
   ãˤϡʾΥ쥯Ȥޤ

redirect_silence
   쥯Ȥλڤ졣٤쥯ȿ¤ã
   쥯ȤߤƤȤƤ⡢δ֤᤮ȥ
   ȤƤޤ

ͥåȥ٤ΰ

ľܤζ(Ʊ󥯤³ƤΡ)ؤ³ɤΤ褦˰
ĤƤ /proc/sys/net/ipv4/neigh ǥ쥯ȥꤷޤ

conf ǥ쥯ȥλƱͤˡǥեȤͤݻ뤿 default
֥ǥ쥯ȥȡ󥿡եȤ˰ĤΥ֥ǥ쥯ȥ꤬¸
ޤǥ쥯ȥȤϤɤƱǤ ͣ㳰 default ǥ
쥯ȥˤϥ٥å쥯Υѥ᡼ꤹ뤿Υץ
󤬴ޤޤƤ뤳ȤǤ

󥿡եǥ쥯ȥˤϰʲΥȥ꤬ޤޤƤޤ

base_reachable_time
   RFC2461 ˻ꤵƤǽ֤׻Τ˻Ѥ
   ١ȤʤͤǤ

retrans_time
   ٳǧ(Neighbor Solicitation) åޤǤλ
   (ñ̤ jiffy = 1/100 )Ǥ ɥ쥹褷ꡢ٤
   ǽǤ뤳Ȥǧꤹݤ˻Ѥޤ

unres_qlen
   ARP ׵ݻ뤿Υ塼κĹǤARP ɥ쥹
   褵Ƥˡ¾ؤ׵ѥåȤɤ
   򼨤Ƥޤ

anycast_delay
   ٳǧåݤΥٱκ֤Ǥñ̤
   jiffy (1/100 )ǤϤޤƤޤ (Linux Ϥ
    anycast 򥵥ݡȤƤޤ)

ucast_solicit
   ˥㥹(unicast)ΤκƻԤκǤ

mcast_solicit
   ޥ㥹(multicast)ΤκƻԤκǤ

delay_first_probe_time
   ٤ǽɤκǽγǧԤޤǤٱ֤Ǥ
   (gc_stale_time 򻲾ȤƤ)

locktime
    ARP/٥ȥϺǤ  locktime вᤷʤ֤
   Ǥޤ ˤä ARP åΥå󥰤ɤ
   ޤ

proxy_delay
    ARP ȥäƤ ARP ׵ޤǤκ
   Ǥºݤλ֤ 0 ʾ proxy_delay ʲˤʤޤ
   ˤϡϥͥåȥΰɤ˻Ѥޤ

proxy_qlen
    ARP ޤٱΥ塼κĹǤ(proxy_delay 
   ȤƤ)

app_solcit
   桼٥ ARP ǡؤ׵οǤ 0 ˤȥ
   ˤʤޤ

gc_stale_time
   Ť ARP ȥɤ٤٤ǥå뤫ޤ 
   ʤä ARP ȥϺƤӲԤޤ(¾Υޥ
   IP ɥ쥹ưΩޤ) ucast_solicit  0 
   кǽŪΥۥȤľ ARP ѥåȤޤ 
   Ԥ  mcast_solicit  0 礭ʾˤ ARP ׵֥
   ɥ㥹Ȥޤ

3.10  Appletalk

/proc/sys/net/appletalk  Appletalk Ѥݤǡݻ
ޤѥ᡼ϰʲΤ褦ˤʤޤ

aarp-expiry-time
   AARP ȥ꤬ڤˤʤޤǤλ֤Ǥ ϸŤۥȤ
   ˻Ѥޤ

aarp-resolve-time
   Appletalk ɥ쥹βߤ뤿˻ѤǤ֤Ǥ

aarp-retransmit-limit
   ɥ쥹κߤǤ

aarp-tick-time
   ڤå٤椹ͤǤ

/proc/net/appletalk ǥ쥯ȥˤϸߤΥޥǻ Appletalk
åȤΥꥹȤޤ

ƥեɤ DDT ס롦ɥ쥹( network:node)
⡼ȥɥ쥹Ԥ塼礭塼礭(ץꥱ
ˤäɤ߹ޤΤԤäƤХȿ) ֡åȤν
ͭԤ uid ȤʤäƤޤ

/proc/net/atalk_iface   Appletalk 򤵤줿ƤΥ󥿡ե
ΥꥹȤǤϥ󥿡ե̾Appletalk ɥ쥹
ɥ쥹ǤΥͥåȥϰ(ޤ phase 1 ͥåȥξϥͥå
ֹ)󥿡եξ֤򼨤Ƥޤ

/proc/net/atalk_route ΤäƤͥåȥ롼ȤΥꥹȤǤ
ϤΥ롼ȤŪΥͥåȥľ³Ƥ롼롼ȡե
롼ηͳǥХޤǤޤ

3.11  IPX

IPX ץȥ /proc/sys/net ˤĴǽͤޤ

ȤϤ IPX ץȥΤ /proc/net/ipx 󶡤Ƥޤ
 IPX åȤΥꥹȤޤǤꡢ 륢ɥ쥹ȥ⡼ȥɥ
Novell (network:node:port)Ϳޤ Novell δ̯˽
 port ʳ 16 ʿǤNot_Connected Υ⡼ȥɥ쥹ˤ
ӤĤƤʤȤ̣Ƥޤ Tx  Rx Ԥ塼
塼礭Хñ̤ǼƤޤstate ϥåȤξ֤
uid ϤΥåȤνͭԤΥ桼 ID 򼨤ޤ

/proc/net/ipx_interface ե IPX 󥿡եΥꥹȤǤ
ƥ󥿡եΥͥåȥֹ桢Ρֹ桢ͥåȥץ饤
ޥͥåȥɤ򼨤ޤޤɤΥǥХ˷ӤĤƤ
뤫(ͥåȥʤ Internal)ȡƤƤ Frame 
פ򼨤ޤLinux  IPX Ѥ 802.3802.2802.2 SNAPDIX (Blue
Book) ͥåȥե졼򥵥ݡȤƤޤ

/proc/net/ipx_route   IPX 롼ȤΰɽǤ줾Υ롼ȤˤĤ
ơŪΥͥåȥ롼ΥΡ(ޤ Directly) ͥåȥ
ξϥ롼Υͥåȥɥ쥹(ޤ Connected)ɽޤ
