VirtualBox: iniciando uma VM pelo terminal

$ VBoxManage list vms
$ nohup VBoxHeadless –startvm 'Windows' -p 3389
$ VBoxManage controlvm 'Windows' poweroff

Slackware: Unpack initrd.img

Unpack:
$ gzip -dc ../initrd.img | cpio -i -d -H newc --no-absolute-filenames
Pack:
$ find . -print | cpio -o -H newc | gzip -9 > ../initrd.img

Shell: Battery monitor

BATTERY_DEVICE=$(hal-find-by-property --key info.category --string battery | head -n 1)
if test -z "${BATTERY_DEVICE}" ; then
BATTERY=0
else
BATTERY=$(hal-get-property --udi ${BATTERY_DEVICE} --key battery.charge_level.percentage)
fi
echo " ${BATTERY}% "

VirtualBox: virtualbox stops working for non root user after glibc updates

cd /usr/src
wget http://www.tux.org/pub/x/ftp.hungry.com/chrpath/chrpath-0.13.tar.gz
tar -zxvf chrpath-0.13.tar.gz
cd chrpath-0.13
./configure && make
cd /opt
ln -s VirtualBox V
cd VirtualBox/
/usr/src/chrpath-0.13/chrpath -r /opt/V *.so

Referência: http://dev.slackverse.org/vbox_glibc_fix.txt

Windows: Como criar um softAP

Abrimos a linha de comandos (cmd.exe) com privilégios de Administrador e configuramos a interface “hosted” através do seguinte comando:

netsh wlan set hostednetwork mode=allow ssid=MEUSSID key=MINHAKEY

Este comando cria uma rede com autenticação do tipo WPA2-PSK.

Activar o HotSpot:

netsh wlan start hostednetwork

Para verificar as configurações pode executar o comando:

netsh wlan show hostednetwork

Shell: Expect

Referência: http://www.thegeekstuff.com/2010/10/expect-examples/

Shell: Manipulacao de parametros e variaveis

Referência: http://www.cyberciti.biz/tips/bash-shell-parameter-substitution-2.html

Shell: Check if variable is a number


echo $X | egrep '^[0-9]+$' >/dev/null 2>&1
if [ "$?" -eq "0" ]; then
echo "Postive integer here...."
else
echo "Something else...."
fi


Linux: Controlling su access with sugroups

Referência: http://www.ibm.com/developerworks/aix/library/au-sugroup/index.html?ca=drs-

Shell: Index of the Bash command line for Linux

Referência: http://ss64.com/bash/

Linux: Alterando encoding dos nomes dos arquivos de uma pasta

De ISO-8859-1 para UTF-8:
$ /usr/bin/convmv --notest -f iso88591 -t utf8 -r "$DIR"

De UTF-8 para ISO-8859-1:
$ /usr/bin/convmv --notest -f utf8 -t iso88591 -r "$DIR"

Vim: Para editar arquivos em UTF8 no vim

set termencoding=utf8
set encoding=utf8

Cups: HP LaserJet P1005

1) Remova o pacote 'system-config-printer'

$ removepkg /var/log/packages/system-config-printer-1.2.2-i486-1

2) Remova o pacote 'hplip'

$ removepkg /var/log/packages/hplip-3.10.2-i486-2

3) Termine a execução do CUPS:

$ sh /etc/rc.d/rc.cups stop

4) Baixe e instale o 'foo2zjs':

$ wget -O foo2zjs.tar.gz http://foo2zjs.rkkda.com/foo2zjs.tar.gz
$ tar zxf foo2zjs.tar.gz
$ cd foo2zjs
$ make
$ ./getweb P1005
$ make install
$ make install-hotplug

5) Restart udevd:

$ sh /etc/rc.d/rc.udev force-reload

Eclipse: Increase memory for Java app

Windows ->
Preferences ->
Java ->
Installed JREs ->
Edit ->
Default VM Arguments: -Xms768m -Xmx1024m

VirtualBox: Windows XP Guest com BSOD - intelppm.sys

Caso apareça o Blue Screen of Death (BSOD) ou "tela azul" no Windows XP como guest no VirtualBox indicando o driver intelppm.sys como causa do problema:
1. Iniciar o Windows XP guest
2. Apertar F8 e entrar na tela de opções de boot
3. Selecionar "Safe mode" ou "Modo de segurança"
4. Entrar como administrador
5. Executar regedit.exe e localizar a chave:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Intelppm
6. Alterar o valor da chave "Start" para 4.

Slackware: teclado us acentos com LANG=en_US.UTF-8

# cd /etc/gtk-2.0/i486-slackware-linux/

# cp gtk.immodules gtk.immodules-original

# vim gtk.immodules

- "cedilla" "Cedilla" "gtk20" "/usr/share/locale" "az:ca:co:fr:gv:oc:pt:sq:tr:wa"
+ "cedilla" "Cedilla" "gtk20" "/usr/share/locale" "az:ca:co:fr:gv:oc:pt:sq:tr:wa:en"

# cd /usr/share/X11/locale/en_US.UTF-8/

# cp Compose Compose-original

# sed 's/ć/ç/g' < Compose | sed 's/Ć/Ç/g' > Compose.new

# cat Compose.new > Compose ; rm Compose.new

Linux: find regex matching multiple extensions

# find . -type f \( -name '*.css' -o -name '*.js' \)

Linux: character set conversion tool

# iconv -f UTF-8 -t ISO-8859-1 input.txt > output.txt

# iconv -f ISO-8859-1 -t UTF-8 filename.txt > output.txt

Linux: Speed Up Linux Software Raid

www.cyberciti.biz/tips/linux-raid-increase-resync-rebuild-speed.html

Linux: cups cliente 403 forbidden

# cupsctl --remote-admin

Slackware: KickStarter - pppd frontend

# usermod -a -G dialout user

# chown root.dialout -R /etc/ppp

# chmod g+w /etc/ppp/chap-secrets pap-secrets

# chmod u+s /usr/sbin/pppd

Shell: Bash Shell Generate Random Numbers

http://www.cyberciti.biz/faq/bash-shell-script-generating-random-numbers/

Linux: Writing udev rules

The base name for your external USB device is /dev/sdb. Next, use udevinfo command with /dev/sdb as an argument to get model attribute:

$ udevadm info -a -p /sys/block/sdb/ | grep model

Now, that we have model attribute, we can add it to /etc/udev/rules.d/50-udev-alias.rules by following line:

KERNEL=="sd*[0-9]", ATTRS{model}=="DataTraveler 2.0", OPTIONS="all_partitions", SYMLINK+="kingston%n", GROUP="disk", MODE="0660"

Reload udev daemon:

sh /etc/rc.d/rc.udev force-reload

Plug-in pendrive and your new base name is: /dev/kingston1

Shell: Dicas para "temperar" seus shell scripts

http://www.cyberciti.biz/tips/spice-up-your-unix-linux-shell-scripts.html

Slackware: GRUB2

Depois de instalado o GRUB2, remova o lilo do MBR por meio do comando:

lilo -u /dev/sda

Ou por meio do comando:

dd if=/dev/zero of=/dev/sda bs=440 count=1

Grave o GRUB2 na MBR:

grub-install /dev/sda

Gere o arquivo de configuração do GRUB2:

grub-mkconfig -o /boot/grub/grub.cfg

Exemplo de grub.cfg:

...
menuentry "GNU/Linux, with Linux 2.6.33-smp" --class gnu-linux --class gnu --class os {
set root='(hd0,3)'
search --no-floppy --fs-uuid --set c0c4a270-18d8-4371-b303-3407c25bfd5b
echo Loading Linux 2.6.33-smp ...
linux /boot/vmlinuz root=/dev/sda3 ro
initrd /boot/vmlinuz
}
menuentry "GNU/Linux, with Linux 2.6.33-smp (recovery mode)" --class gnu-linux --class gnu --class os {
set root='(hd0,3)'
search --no-floppy --fs-uuid --set c0c4a270-18d8-4371-b303-3407c25bfd5b
echo Loading Linux 2.6.33-smp ...
linux /boot/vmlinuz root=/dev/sda3 ro single
initrd /boot/vmlinuz
}
menuentry "Windows XP" {
set root=(hd0,2)
chainloader +1
}

Slackware: Eclipse crashes with Seamonkey lib

Uma solução eh remover o pacote Seamonkey.

Outra solução é editar o arquivo eclipse.ini e adicionar a linha:

-Dorg.eclipse.swt.browser.XULRunnerPath

A arquivo fica assim:
...
-vmargs
-Dosgi.requiredJavaVersion=1.5
-Dorg.eclipse.swt.browser.XULRunnerPath
-XX:MaxPermSize=256m
-Xms40m
-Xmx512m

Linux: Erasing Command History

$ history -c
will clear the history list and
$ history -d N
will delete a history entry N

Referência: the-definitive-guide-to-bash-command-line-history

Shell: Read a Line Field By Field

http://www.cyberciti.biz/faq/bash-shell-read-a-line-field-by-field/

Linux: Software RAID 1 (Mirror)

http://www.cyberciti.biz/faq/linux-creating-software-raid-one-arrays/

Linux: Port Redirection With Iptables

http://www.cyberciti.biz/faq/linux-port-redirection-with-iptables/