Slackware: Force fsck

Para forçar uma checagem de disco nas suas partições linux na inicialização do sistema (Slackware):

$ touch /etc/forcefsck

Debian Like:

$ touch /forcefsck

Linux: Ativando a função copiar e colar com o mouse no vim pelo X

1. Edite o arquivo de configuração do vim:

vi ou vim /usr/share/vim/vimrc

2. Localize a seguinte linha:

set mouse=a

3. Apague esta linha.

Utilities: Convert Files

http://www.convertfiles.com/

Linux: Dropbox

http://wiki.dropbox.com/TipsAndTricks/TextBasedLinuxInstall

Slackware: Summer 2009/2010

#!/bin/bash

cat << EOF > /usr/share/zoneinfo/Brazil/summer2009.zic
Rule Brazil 2009 only - Oct 18 00:00 1 S
Rule Brazil 2010 only - Feb 21 00:00 0 -

Zone Brazil/East -3:00 Brazil BR%sT
EOF

zic /usr/share/zoneinfo/Brazil/summer2009.zic

cat /etc/localtime > /etc/localtime.copy && \
rm /etc/localtime && \
ln -s /usr/share/zoneinfo/Brazil/East /etc/localtime

Java: GTK look and feel for Netbeans

/path_where_netbeans_are_installed/bin/netbeans \
--laf com.sun.java.swing.plaf.gtk.GTKLookAndFeel

X11 screenshot with ImageMagick

$ /usr/bin/import -display localhost:0.0 -window root screenshot_filename.jpg

MD300

São necessários os módulos:

$ /sbin/modprobe usbnet (CONFIG_USB_USBNET=m)
$ /sbin/modprobe cdc_ether (CONFIG_USB_NET_CDCETHER=m)
$ /sbin/modprobe cdc_wdm (CONFIG_USB_WDM=m)
$ /sbin/modprobe cdc_acm (CONFIG_USB_ACM=m)

Adicionar a seguinte regra ao udev:

$ cat << EOF > /etc/udev/rules.d/50-md300.rules
ACTION!="add", GOTO="3G_End"
BUS=="usb", SYSFS{idProduct}=="d0cf", SYSFS{idVendor}=="0fce", PROGRAM="/bin/sh -c 'echo 3 > /sys/%p/device/bConfigurationValue'"
LABEL="3G_End"
EOF

$ sh /etc/rc.d/rc.udev restart

Mouse and Keyboard don't work in Xorg

Xorg error:

config/hal: couldn't initialise context: (null) ((null))

So, add to Server Section:

Option "AllowEmptyInput" "false"

Finding Memory Leaks With Valgrind

% valgrind --tool=memcheck --leak-check=yes your_program

Referência: http://www.cprogramming.com

An unexpected error has been detected by Java Runtime Environment

I start eclipse I get this message almost immediately after choosing a Workspace and the main eclipse window loads:

#
# An unexpected error has been detected by Java Runtime Environment:
#
# SIGSEGV (0xb) at pc=0xb2ca598b, pid=5465, tid=3086076112
#
# Java VM: Java HotSpot(TM) Client VM (11.0-b16 mixed mode, sharing linux-x86)
# Problematic frame:
# C [libswt-mozilla-gtk-3452.so+0x1098b]
#
# An error report file with more information is saved as:
# /path/to/hs_err_pid5465.log
#
# If you would like to submit a bug report, please visit:
# http://java.sun.com/webapps/bugreport/crash.jsp
# The crash happened outside the Java Virtual Machine in native code.
# See problematic frame for where to report the bug.

So, I downgrade seamonkey to version 1.1.13 and this solved my problem.

Nova compactação e extensão de pacotes Slackware

A partir do Slackware Current, atualizei os pacotes pkgtools e slackpkg. Instalei o pacote xz-4.999.8beta-i486-1 para não ocorrer o seguinte erro:

external compression utility xz missing

Disabling my hd noise problem (laptop)

$ hdparm -I /dev/sda | grep "Advanced power management level"

Advanced power management level: 128

$ hdparm -B254 /dev/sda

Advanced power management level: disabled

Multimidia:Extracting audio

$ mplayer -dumpaudio foo.flv -dumpfile bar.mp3

or

$ ffmpeg -i foo.flv -ab 128 -ar 44100 bar.mp3

also

$ mplayer -dumpstream http://STREAM_HOST -dumpfile foobar.mp3

or

$ ffmpeg -i http://STREAM_HOST -ab 128 -ar 44100 foobar.mp3

Perl: Read each 2048 bytes from a file

MySQL Reset Root Password

Referência: http://www.cyberciti.biz/faq/mysql-reset-lost-root-password/

Use Gmail Account To Relay Email From a Shell Prompt

Referência: http://www.cyberciti.biz/tips/linux-use-gmail-as-a-smarthost.html

Perl Match and Replace in multiple lines

Referência: Referência: SED Script to remove a few lines out of a file

Understanding perl variable references

Referência: http://linuxshellaccount.blogspot.com/2009/01/understanding-perl-variable-references.html

Take effect without restarting the Apache server

$ apachectl -k graceful

Referência: www.cyberciti.biz/faq/apache-making-changes-config-file-without-restarting