2005/05/08 / TECH

Gentoo Linux Tips

abstract

Little tips in using gentoo linux.

To start kinput2 under KDE3&kdm environment automatically

Add line below to /etc/X11/Sessions/kde-*

kinput2 -canna -xim &

To use kinput2 with software built with gtk+2 toolkit

Add lines below to /usr/X11R6/lib/X11/app-defaults/Kinput2

*SeparateConversion.input: false
*selectionShell.input: false
*auxShell.input: false

!*SeparateConversion.title: Kana-Kanji Conversion
!*selectionShell.title: Candidate Selection
!*auxShell.title: Auxiliary Control

To set the systemwide default language Japanese

Create the file /etc/env.d/99lang_env and add lines below

LANG=ja_JP.eucJP
XMODIFIERS="@im=kinput2"

To add cannadic & canna-2ch

add lines below to /var/lib/canna/dic/dics.dir

gcanna.ctd(gcanna.mwd)        -gcanna---
gcannaf.ctd(.swd)             -gcannaf---
nichan.ctd(.mwd)              -nichan---

add “gcanna” “gcannaf” “nichan” to /usr/share/canna/default.canna

To compile kernel without genkernel

For kernel 2.4.

# make menuconfig
# make dep && make clean bzImage modules modules_install
# cp /usr/src/linux/arch/i386/boot/bzImage /boot

For kernel 2.6.

# make menuconfig
# make && make modules_install
# cp System.map /boot
# cp arch/i386/boot/bzImage /boot/vmlinuz
# cp .config /boot/config

e.g. When you update gcc or python or whatever, and emerge stop working correctly

# ldconfig

My make.conf

CHOST="i686-pc-linux-gnu"
USE="cjk nls qt kde -gtk gtk2 -gnome alsa cups crypto mmx sse
         dvd f2c divx4linux dvd dvdread live xvid"
CFLAGS="-O3 -mcpu=pentium4 -march=pentium4 -mfpmath=sse -msse2 
        -mmmx -fforce-addr -fomit-frame-pointer -funroll-loops
        -frerun-cse-after-loop -frerun-loop-opt -falign-functions=4
        -pipe -s -z combreloc"
CXXFLAGS="${CFLAGS}"
MAKEOPTS="-j3"
PORTAGE_NICENESS=+10
ALSA_CARDS='intel8x0'
LINGUAS="ja"
SYNC="rsync://rsync.us.gentoo.org/gentoo-portage"
VIDEO_CARDS="i830"
AUTOCLEAN="yes"

Location of the world favorite list

/var/cache/edb/world

SSH RSA key generation

On the destination console:

$ ssh-keygen -t rsa

enter passphrase, then id_rsa.pub will be generated at ~/.ssh/

at the client console:

$ ssh-keygen -t rsa

enter passphrase, then id_rsa.pub will be generated at ~/.ssh/ After this, execute following at the client console

$ scp ~/.ssh/id_rsa.pub $DESTINATION:/home/$USERNAME/.ssh/authorized_keys
$ ssh $DESTINATION
$ chmod 600 ~/.ssh/authorized_keys

Please replase $DESTINATION with either IP address or domain name of the destination.

rsync usage (with SSH)

rsync -avz -e ssh $SOURCE $DESTINATION:$TARGET_DIR

Please replace $SOURCE with the file/directory you want to copy, $DESTINATION with either IP address or domain name of the destination, and $TARGET_DIR with the directory that you want your $SOURCE to be copied at.

if you want to delete the file from $TARGET_DIR which is deleted from $SOURCE recently, add --delete option.

if you want to exclude certain kinds of files, use --exclude 'filename' option. You can use wildcards.

enable cron for normal user on Gentoo system

# gpasswd -a masumi cron

allow su user to run X program

$ xhost +localhost

Change OpenOffice UI font

Startup the OpenOffice.org, and go to Tools -> Options -> OpenOffice.org -> Font Replacement. Then replace Andale Sans UI with desired font.

Add Truetype font to OpenOffice.org

# /opt/OpenOffice.org/program/spadmin

Location may vary, depending on the installation method.

NTP time adjustment

when the internal clock was messed up a lot

$ ntpdate [server IP]

to retrieve the status of local NTP daemon (ntpd)

$ ntpq -p

When GCC is messed up

Installing pre-compiled GCC may help.

# mkdir /usr/portage/packages/All
# wget -P /usr/portage/packages/All
# http://dev.gentoo.org/~avenj/bins/gcc-3.2.3-r1.tbz2
# tar -xvjpf /usr/portage/packages/All/gcc-3.2.3-r1.tbz2 -C /
# env-update && source /etc/profile

When GCC is messed up [2]

If you experience difficulties emerging with the following error message (after updating GCC to Version 3.3.5)

grep: /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.4/libstdc++.la: No such file or directory
/bin/sed: can't read /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.4/libstdc++.la: No such file or directory
libtool: link: `/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.4/libstdc++.la' is not a valid libtool archive
make[4]: *** [libdirectfb_sdlinput.la] Error 1
make[4]: *** Waiting for unfinished jobs....
grep: /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.4/libstdc++.la: No such file or directory
/bin/sed: can't read /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.4/libstdc++.la: No such file or directory
libtool: link: `/usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.4/libstdc++.la' is not a valid libtool archive

Try executing the following command

emerge libtool && fix_libtool_files.sh 3.3.4 && env-update && source /etc/profile

References

emerge xfree problem fix

For xfree-4.3.0-r5

ln -sf /usr/lib/gcc-lib/i686-pc-linux-gnu/3.3.3/libstdc++.so.5 /usr/lib/libstdc++.so.5

To remove all the packages with no dependency

emerge depclean

Prelinking

prelink -afmR

ALSA stopped working with kernel 2.6.11

Soundcard is intel8x0. After compiling kernel 2.6.11, the audio stopped working. To workaround with this problem, execute

amixer sset 'Headphone Jack Sense' off

Reference