memo.xight.org

- 準備
umount して作業する．
起動しない，または umount できなければ，別PCに接続して作業する．

- ddコマンドの実行
/dev/hdb3 を hdb3.imgにイメージファイルとして保存する．

# dd if=/dev/hdb3 of=hdb3.img bs=512 conv=noerror,sync

- イメージファイルにfsck

$ fsck hdb3.img

- エラー修復後のイメージファイルをマウントする

# mount -o

- Reference
ぴょぴょぴょ? - 壊れたHDDからデータを取出す方法
http://d.hatena.ne.jp/pyopyopyo/20061118/p1

- /etc/sysctl.conf

net.ipv4.tcp_window_scaling = 1
net.ipv4.tcp_syncookies = 1
net.core.rmem_max = 16777216
net.core.wmem_max = 16777216
net.ipv4.tcp_rmem = 4096 87380 16777216
net.ipv4.tcp_wmem = 4096 65536 16777216

- sysctlのすべての項目と値を表示

# sysctl -a

- sysctlの項目を指定して表示

# sysctl -q net.ipv4.tcp_window_scaling

- rebootしないで有効化

# sysctl -p /etc/sysctl.conf

- 項目を指定して有効化 (rebootで元に戻る)

# sysctl -w net.ipv4.tcp_window_scaling=1

- Reference
builder by ZDNet Japan - Linuxのネットワークスループット改善法教えます
http://builder.japan.zdnet.com/news/story/0,3800079086,20365515,00.htm

- /etc/vsftpd/vsftpd.conf

# /etc/vsftpd.user_listを使用しない
# /etc/vsftpd.ftpusersで指定したユーザを拒否する
userlist_enable=NO

# /etc/vsftpd.user_listで指定したユーザのみログインを許可する
# /etc/vsftpd.ftpusers で指定したユーザは，認証でエラーとなる
userlist_enable=YES
userlist_deny=NO

# /etc/vsftpd.user_listで指定したユーザのみログインを拒否する．
# /etc/vsftpd.user_listで指定されていないユーザはログインを許可する．
# /etc/vsftpd.ftpusers で指定した場合，パスワードの入力は求められるが，接続は拒否する
userlist_enable=YES
userlist_deny=YES

- Reference
vsftpd(RedHat9)
http://www.aritia.org/hizumi/dsl/page_23.htm

- Reference
Open Tech Press | 削除したファイルをlsofで復元する
http://opentechpress.jp/developer/article.pl?sid=06/11/23/0451251

Linux.com | CLI Magic: lsof
http://enterprise.linux.com/article.pl?sid=05/10/21/004255&tid=89

- Reference
Cooperative Linux
http://www.colinux.org/

Cooperative Linux(coLinux)のメモ
http://scratchpad.fc2web.com/colinux/

ERROR STORM
http://www.geocities.jp/error_storm/

- apt-line
/etc/apt/sources.list

deb http://kanotix.com/files/debian unstable main

- Install

# apt-get install freenx

- Setup

# nxsetup --install

- Reference
FreeNX - the free NX
http://freenx.berlios.de/

NoMachine NX - Download the NX Terminal Server and Remote Access Software
http://www.nomachine.com/download.php

FreeNX - PukiWiki
http://tidus.ultimania.org/wiki/index.php?FreeNX

@IT - FreeNXでLinuxをリモート操作するには
http://www.atmarkit.co.jp/flinux/rensai/linuxtips/926usefreenx.html

Ubuntu Japanese Team - 2005-07-29 - NoMachine NX ClientとFreeNXを利用したシンクライアントシステム
http://www.ubuntulinux.jp/News/News20050729/

- via
GIGAZINE - 2006-09-08 - VNCよりも高速で遠隔操作できる「FreeNX」
http://gigazine.net/index.php?/news/comments/20060908_freenx/

- Summary
*.c の中から文字列 "hoge" を検索するには，

% find . -name \*.c -pring | xargs grep hoge

- Reference
Landspace - 2003-11-07 - find + xargs と find -exec の使い分け
http://sonic64.com/2003-11-07.html

UNIXの部屋 - find の検索結果
http://x68000.startshop.co.jp/~68user/unix/pickup?find

- via
GIGAZINE - 2006-08-27 - Linuxディストリビューションの系統図
http://gigazine.net/index.php?/news/comments/20060827_linux_distributions/

- Reference
DSAS開発者の部屋 - 2006-08-24 - こんなに簡単! Linuxでロードバランサ (1)
http://dsas.blog.klab.org/archives/50664843.html

- Reference
Linux Command Line Tips
http://www.pixelbeat.org/cmdline.html

- Summary

- Summary


- Reference
Todo.txt - Task tracking for command line lovers
http://todotxt.com/

- via
MYCOMジャーナル - ターミナルでTODO管理 - todo.sh 1.6
http://journal.mycom.co.jp/news/2006/07/05/345.html

phpspot開発日誌 - 2006-07-14 - ターミナルでTODO管理する:todo.sh
http://phpspot.org/blog/archives/2006/07/todotodosh.html

- Summary
SLAXベースの1CD Linux.
クラックツールが満載．

- Reference
Remote-exploit.org - BackTrack
http://www.remote-exploit.org/index.php/BackTrack

Remote-exploit.org - Auditor
http://www.remote-exploit.org/index.php/Auditor

- Summary
lm-sensors でCPU，M/B，電圧，FANの回転数などの情報が取得可能．

- Install

# aptitude install lm-sensors

- Setting

# /usr/sbin/sensors-detect

This program will help you determine which I2C/SMBus modules you need to
load to use lm_sensors most effectively. You need to have i2c and
lm_sensors installed before running this program.
Also, you need to be `root', or at least have access to the /dev/i2c-*
files, for most things.
If you have patched your kernel and have some drivers built in, you can
safely answer NO if asked to load some modules. In this case, things may
seem a bit confusing, but they will still work.

It is generally safe and recommended to accept the default answers to all
questions, unless you know what you're doing.

 We can start with probing for (PCI) I2C or SMBus adapters.
 You do not need any special privileges for this.
 Do you want to probe now? (YES/no): yes

長々とメッセージが出ただけだった．

Probing for PCI bus adapters...
Use driver `i2c-viapro' for device 00:11.0: VIA Technologies VT8237 South Bridge
Probe succesfully concluded.

As you are not root, we can't load adapter modules. We will only scan
already loaded adapters.
If you have undetectable or unsupported adapters, you can have them
scanned by manually loading the modules before running this script.

 To continue, we need module `i2c-dev' to be loaded.
 If it is built-in into your kernel, you can safely skip this.
 i2c-dev is not loaded. As you are not root, we will just hope you edited
 `/etc/modules.conf' for automatic loading of
 this module. If not, you won't be able to open any /dev/i2c-* file.

 We are now going to do the adapter probings. Some adapters may hang halfway
 through; we can't really help that. Also, some chips will be double detected;
 we choose the one with the highest confidence value in that case.
 If you found that the adapter hung after probing a certain address, you can
 specify that address to remain unprobed. That often
 includes address 0x69 (clock chip).

Some chips are also accessible through the ISA bus. ISA probes are
typically a bit more dangerous, as we have to write to I/O ports to do
this. This is usually safe though.

As you are not root, we shall skip this step.

Some Super I/O chips may also contain sensors. Super I/O probes are
typically a bit more dangerous, as we have to write to I/O ports to do
this. This is usually safe though.

As you are not root, we shall skip this step.

 Sorry, no chips were detected.
 Either your sensors are not supported, or they are
 connected to an I2C bus adapter that we do not support.
 See doc/FAQ, doc/lm_sensors-FAQ.html, or
 http://www2.lm-sensors.nu/~lm78/cvs/lm_sensors2/doc/lm_sensors-FAQ.html
 (FAQ #4.24.3) for further information.
 If you find out what chips are on your board, see
 http://secure.netroedge.com/~lm78/newdrivers.html for driver status.

- 実行してみる

$ sensors
Can't access procfs/sysfs file
Unable to find i2c bus information;
For 2.6 kernels, make sure you have mounted sysfs and done
'modprobe i2c_sensor'!
For older kernels, make sure you have done 'modprobe i2c-proc'!

- 再チャレンジ

# modprobe i2c-viapro
# sensors
No sensors found!

... センサーが見つかりませんでした．

- Reference
ずんWiki - lm-sensorsでハードウェアモニタリング
http://www.kawaz.jp/pukiwiki/?lm-sensors%A4%C7%A5%CF%A1%BC%A5%C9%A5%A6%A5%A7%A5%A2%A5%E2%A5%CB%A5%BF%A5%EA%A5%F3%A5%B0

- Summary
突然，ターミナルに以下のメッセージが表示された．

Message from syslogd@hostname at Fri Jun 23 21:54:41 2006 ...
hostname kernel: CPU0: Temperature above threshold

Message from syslogd@hostname at Fri Jun 23 21:54:41 2006 ...
hostname kernel: CPU0: Running in modulated clock mode

Message from syslogd@hostname at Fri Jun 23 21:54:47 2006 ...
hostname kernel: CPU0: Temperature above threshold

Message from syslogd@hostname at Fri Jun 23 21:54:47 2006 ...
hostname kernel: CPU0: Running in modulated clock mode

原因はCPU温度が高すぎたため．
CPU温度は64度だった．

- Reference
Fedora JP 掲示板 - GNOMEターミナルおかしいです...
http://bbs.fedora.jp/read.php?FID=3&TID=1241

- Summary
ディスク容量を表示するソフトウェア du の豪華版．
du の出力結果を色付けし，パーセント表示が行える．

- Reference
MOONGIFT - gt5
http://oss.moongift.jp/intro/i-1922.html

MOONGIFT - gt5 レビュー
http://oss.moongift.jp/review/i-1923.html

- Reference
なぜ tar+gzip はよくないか？
http://www.linux.or.jp/JF/JFdocs/Backup-mini-HOWTO/tar-gz.html

- Reference
設定ファイルをまとめて管理する
http://playrecord.org/archive/config-files-on-Unix/myconf.html
uyota 匠の一手 - 2006-03-19 - Single System, Multiple Machines
http://uyota.asablo.jp/blog/2006/03/19/294745
uyota 匠の一手 - 2006-03-20 - Single System, Multiple Machines #2
http://uyota.asablo.jp/blog/2006/03/20/296243
- via
void GraphicWizardsLair( void ); // /etcや/usr/local/etcなどを一カ所で管理するテクニック
http://www.otsune.com/diary/2006/06/12/3.html#200606123

- Summary
PukiWiki で構築されたLinuxソフトライブラリ．
- Reference
ペンギンの杜 - Linuxソフトライブラリ
http://www.ut-info.com/linux-soft/

- Summary
Linux Kernelは本来，CPU0のみがハードウエアからの割り込みを処理するが，
irqbalanceを導入することで，マルチCPU環境で2nd CPU以降も割り込み処理を行えるようになる．
1CPUのマシンでは使用する意味は無い．

以下を実行し，複数のCPUが表示されればOK．

% cat /proc/interrupts

- 2CPUの場合の例

CPU0 CPU1
  0: 8470386 8463949 IO-APIC-edge timer
  1: 3 3 IO-APIC-edge keyboard
  2: 0 0 XT-PIC cascade
  8: 1 0 IO-APIC-edge rtc
 11: 0 0 IO-APIC-level usb-ohci
 12: 93 47 IO-APIC-edge PS/2 Mouse
 14: 64 0 IO-APIC-edge ide2
 17: 70903 15277 IO-APIC-level ide0
 19: 1944132 0 IO-APIC-level eth0
NMI: 0 0
LOC: 16934242 16934259
ERR: 0
MIS: 1

- 1CPUの場合の例

CPU0
  0: 2609483773 IO-APIC-edge timer
  1: 9 IO-APIC-edge i8042
  9: 0 IO-APIC-level acpi
 14: 3287084 IO-APIC-edge ide0
 15: 1 IO-APIC-edge ide1
201: 5996744 IO-APIC-level eth0
NMI: 0
LOC: 2609834207
ERR: 0
MIS: 0

- Reference
技術情報ツリー
http://h50221.www5.hp.com/cgi/service/knavi/production/doc_disp.cgi?category=722&doc=jnav004182