Disable PC Speaker in Fedora

Notes Tagged with:
Aug 142010

Just ran across this, could be useful.
From http://blog.laimbock.com/2009/08/08/disable-pcpskr-module-on-fedora/

echo "blacklist pcspkr" > /etc/modprobe.d/pcspkr.conf
rmmod pcspkr
Posted by Peter at 08:03 No Responses »

NetworkManager and resolv.conf

Notes Tagged with: ,
Jul 152010

To set up server and search entries in /etc/resolv.conf,
use settings like these in /etc/sysconfig/network-scripts/ifcfg-eth0:

DNS1=192.168.1.1
DNS2=192.168.1.2
DOMAIN="sub.mydomain.com mydomain.com"
Posted by Peter at 06:18 No Responses »

Sun Java 6 on Fedora

Notes Tagged with: ,
Jun 072010

Here is the right way to install Sun Java 6 on Fedora.

This method handles the alternatives system, and makes rpm packages
so upgrading is easy:

http://www.city-fan.org/tips/SunJava6OnFedora

Another, older version of this approach I used to use:

http://www.lbotti.net/blog/tag/java/

Posted by Peter at 06:36 No Responses »

Linux Reboot with SysRq

Notes Tagged with:
Apr 102007

You can tell the kernel to reboot a Linux system without access to a filesystem (e.g. a frozen RAID controller) or the usual commands.

First saw this at:
http://blog.air4web.com/linux-force-reboot.html

Force hard reboot (no shutdown runlevel, no sync):

echo 1 > /proc/sys/kernel/sysrq ; echo b > /proc/sysrq-trigger

Force shutdown:

echo 1 > /proc/sys/kernel/sysrq ; echo o > /proc/sysrq-trigger
Posted by Peter at 05:24 No Responses »

Type1 Fonts in Linux

Notes Tagged with: ,
Nov 252006

Installing Type1 fonts:

cd /usr/share/fonts/Type1
cp *.{afm,pfb} .
/usr/local/bin/type1inst
/etc/rc.d/init.d/xfs reload

From the type1inst README:

type1inst lives on the Linux archive sunsite.unc.edu in
/pub/Linux/X11/xutils. Updates will be placed there as required.

Monospaced Fonts in Adobe Font Folio:

Courier                               *really nice*
  Adobe Type Basics Fonts/{cob,cobo,com,coo}*

Letter Gothic
  Adobe Font Folio Fonts/Letter Gothic/*

Lucida Sans Typewriter                *really nice*
  Adobe Font Folio Fonts/Lucida Sans Typewriter/*

Lucida Typewriter             *really nice*
  Adobe Font Folio Fonts/Lucida Typewriter/*

OCR
  Adobe Font Folio Fonts/OCRA, OCRB, MICR/

Orator
  Adobe Font Folio Fonts/Orator/

Prestige Elite
  Adobe Font Folio Fonts/Prestige Elite/
Posted by Peter at 08:12 No Responses »

Creating a Bootable CD from a Bootable Floppy

Notes Tagged with: ,
Sep 252006

See http://tldp.org/HOWTO/Bootdisk-HOWTO/cd-roms.html

  • Copy the floppy files to $SRCDIR:

    mount -t vfat -o ro /dev/fd0 /mnt/floppy
cd $SRCDIR
cp -p /mnt/floppy/* .

  • Copy the floppy image with:

    dd if=/dev/fd0 of=boot/boot.img bs=10k count=144

  • Create CD image with:

    mkisofs -r -b boot/boot.img -c boot/boot.catalog -o ../bootcd.iso .

  • Burn CD

Posted by Peter at 03:35 No Responses »

MythTV Setup

Notes Tagged with: ,
Mar 082006

Excellent step-by-step for FC4 is at: http://wilsonet.com/mythtv/fcmyth.php

Test System:

  • Dell Dimension GX260 Desktop
  • P4 2.2 GHz, 1 GB DDR 266, 80 GB Seagate Barracuda IV ATA disk
  • HP L1506 1024×768 LCD monitor

IMPORTANT: Set these video settings in BIOS:

AGP Aperture: 32 MB
Video Memory Size:
  8 MB

to get better than VGA resolution (!)

OS Installation

Install FC4 per wilsonet.com step-by-step page above.

Boot installation CD with:

boot: linux jfs resolution=1024x768

Install type: Custom

Manually partition:

Partition   Mount Point   Size (MB)   Format
/dev/hda1   /boot         102         ext3
/dev/hda3   swap          1028        swap
/dev/hda2   /             10237       ext3
/dev/hda5   /video        64950       jfs   (rest of disk)

Other Settings:

  • IP: creampuff.stardust.org 192.168.5.3
  • No firewall, SELinux: Disabled
  • Packages per wilsonet.com, including Development tools, X devel, KDE devel

Initial Setup

Create system user peterp at prompts

/usr/sbin/useradd mythtv # creates w/ uid 501, gid 501

Set up local yum repository and copy over /etc/hosts file to resolve yum hostname

/etc/yum.repos.d/fedora.repo:

[base]
name=Fedora Core $releasever - $basearch - Base
#baseurl=http://download.fedora.redhat.com/pub/fedora/linux/core/$releasever/$basearch/os/
#mirrorlist=http://fedora.redhat.com/download/mirrors/fedora-core-$releasever
baseurl=http://yum/fedora/$releasever/$basearch/base/
enabled=1
gpgcheck=1
gpgkey=file:///etc/pki/rpm-gpg/RPM-GPG-KEY-fedora

fedora-updates.repo and fedora-extras.repo use /$basearch/{updates,extras}/
in the baseurl (copy them from original files too)

Update all with:

# yum update yum              [ accept importing GPG key ]
# yum upgrade                 [ update 280 and install 9 packages ]

Then reboot.

MythTV

Note: version 19 had major video rebuffering problems, try version 18.1

X Setup

Tricky X setup for i845 motherboard chipset:

In /etc/X11/xorg.conf:

Section "Monitor"
        Identifier   "Monitor0"
        VendorName   "Monitor Vendor"
        ModelName    "LCD Panel 800x600"
        HorizSync    31.5 - 37.9
        VertRefresh  40.0 - 70.0
        Option      "dpms"
EndSection

Section "Device"
        Identifier  "Videocard0"
        Driver      "i810"
        VendorName  "Videocard vendor"
        BoardName   "i810 driver"
EndSection

Section "Screen"
        Identifier "Screen0"
        Device     "Videocard0"
        Monitor    "Monitor0"
        DefaultDepth     24
        SubSection "Display"
                Viewport   0 0
                Depth     24
                Modes    "800x600" "640x480"
        EndSubSection
EndSection
Posted by Peter at 05:59 No Responses »

Using an iPod with Linux

Notes Tagged with: ,
Sep 122005

hotplug and automount

from the gtkpod README:

You need to install the following external packages:

Write rules for udev to recognize your iPod automatically
(mind the spaces within "iPod…"):

/etc/udev/rules.d/10-ipod.rules:

#
# udev rules for ipod
#
BUS="scsi", SYSFS{model}="iPod            ", KERNEL="sd?2", NAME="%k", SYMLINK="ipod"

This will map /dev/sd?2 to /dev/ipod everytime you plug in your iPod.

Set up autofs to automatically mount the iPod when you access it
and unmount it after 2 seconds of inactivity.
In /etc/auto.master add:

# automount for removable devices:
/var/autofs/removable   /etc/auto.removable     --timeout=2,user,sync,nodev,nosuid,gid=peterp,umask=007

Adjust the gid, umask (and uid) values to whatever you need — in this
example all users in the group "peterp" have read/write access.

In /etc/auto.removable add:

ipod            -fstype=vfat            :/dev/ipod

Then simply add a link from /mnt/ipod:

ln -s /var/autofs/removable/ipod /mnt/ipod

Now accessing the /mnt/ipod link will automount the iPod drive.

gnupod

I used these FC3 packages for gtkpod and faad2 (for libmp4v2):

Make a backup of the iPod iTunesDB:

cp /mnt/ipod/iPod_Control/iTunes/iTunesDB ~/.gtkpod/iTunesDB.orig.bak
Posted by Peter at 06:55 No Responses »

Working with ISO images

Notes Tagged with: ,
Jul 182005

Under Linux:

  • Making ISO image:

    % mkisofs -R -o cdroot.iso $CDROOT

  • Burning ISO image:

    % cdrecord -v speed=1 dev=/dev/cdwriter -data cdroot.iso

  • Checking out ISO image:

    # mount -o loop -t iso9660 -r cdroot.iso /mnt
Posted by Peter at 03:30 No Responses »

Linux Hotplug Support for usb-storage Devices

Notes Tagged with: ,
Nov 132004

Update in 2006: Note that this has all become much easier with developments in hal and friends.

USB hotplug setup for flash memory storage devices, e.g. Photosmart 370 printer:

/etc/hotplug/usb.agent looks in usb.usermap to find entries for a device.

  1. Add to usb.usermap:

    usb-storage          0x0003      0x03F0   0x1302    0x00    ...
# ^                    ^           ^        ^
#driver               flags       vendorid productid
#                     [0x3==vendor&product]

    In hotplug.functions load_drivers(), if the driver is usb-storage, it runs
    /usr/sbin/updfstab to add an fstab entry for the new device.

  2. To support updfstab, add to /etc/updfstab.conf:

    device photoprinter {
    symlink true
    partition 1
    match   hd Photosmart
}

    where:

    photoprinter

    is the device name

    symlink true

    makes a link /dev/photoprinter -> /dev/sd?1

    match hd

    "Photosmart" is a string to match in the hw description

    updfstab will add an fstab entry for the device with noauto,owner,kudzu
    so the device owner can mount/unmount.

    updfstab then runs {{{/sbin/pam_console_apply}}} to update device permissions for the console user.

  3. Change /etc/security/console.perms:

    <flash>=/mnt/flash* \
        /dev/photoprinter

<console>  0600 <flash>      0660 root.disk

    to add /dev/photoprinter to <flash> devices and set permissions.

Note that pam_console_apply will follow the /dev/photoprinter symlink
when setting permissions, so the console user (now the owner) can
mount and unmount the device.

Posted by Peter at 07:44 No Responses »
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