Computer/Linux の履歴(No.10)

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- 1 (2010-03-11 (木) 15:55:11)
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Linux

Top/Computer/Linux

Compaq 6715s WLAN
systemd
cpufreqd
ext3の高速化
dpkg
iptables

Linux Kernel Newbies
- http://kernelnewbies.org/

The Linux Documentation Project
- http://www.tldp.org/

カーネルモジュール作成メモ
- http://www.hakodate-ct.ac.jp/~tokai/tokai/research/kmod.html

Compaq 6715s WLAN†

dmesg

[  280.985084] b43-phy0: Broadcom 4311 WLAN found (core revision 13)
[  281.016439] b43-phy0: Found PHY: Analog 4, Type 2 (G), Revision 9
[  281.016493] b43-phy0: Found Radio: Manuf 0x17F, ID 0x2050, Revision 2, Version 0
[  281.028858] Broadcom 43xx driver loaded [ Features: PNL ]
[  281.058968] b43 ssb0:0: Direct firmware load for b43/ucode13.fw failed with error -2
[  281.059110] b43 ssb0:0: Direct firmware load for b43/ucode13.fw failed with error -2
[  281.059266] b43 ssb0:0: Direct firmware load for b43-open/ucode13.fw failed with error -2
[  281.059342] b43 ssb0:0: Direct firmware load for b43-open/ucode13.fw failed with error -2
[  281.059371] b43-phy0 ERROR: Firmware file "b43/ucode13.fw" not found
[  281.059379] b43-phy0 ERROR: Firmware file "b43-open/ucode13.fw" not found
[  281.059403] b43-phy0 ERROR: You must go to http://wireless.kernel.org/en/users/Drivers/b43#devicefirmware and download the correct firmware for this driver version. Please carefully read all instructions on this website.

↑

systemd†

http://kenjiszk.hatenablog.com/entry/2015/05/05/235051
systemdは/etc/inittabを使わないのでsvscanbootが自動起動しない
systemd流儀で起動させる

/etc/systemd/system/daemontools.service

[Unit]
Description=daemontools Start supervise
After=getty.target

[Service]
Type=simple
User=root
Group=root
Restart=always
ExecStart=/command/svscanboot /dev/ttyS0
TimeoutSec=0

[Install]
WantedBy=multi-user.target

enable & start

systemctl enable daemontools
systemctl start daemontools

↑

cpufreqd†

install
```
apt-get install cpufreqd cpufrequtils
```

governor
```
cpufreq-set -g ondemand
```

↑

ext3の高速化†

/etc/fstab

/dev/hda1 / ext3 errors=remount-ro,noatime,data=writeback 0 1

/boot/grub/grub.cfg

linux   /boot/vmlinuz-2.6.x root=UUID=1234-5-hoge ro rootflags=data=writeback

tune2fs

tune2fs -o journal_data_writeback /dev/hda1

↑

dpkg†

--set-selections

echo linux-image-3.16.0-70-lowlatency hold | dpkg --set-selections

--get-selections
```
dpkg --get-selections | grep xxx
```

↑

iptables†

iptables -L