meinhardt_jgbr
(usa Debian)
Enviado em 13/07/2010 - 09:34h
Felipe,
Os arquivos do /etc/init.d são scripts que comandam a execução de várias tarefas tanto na partida como na desativação do sistema e os níveis de atividade (run levels) bem como a forma em que os arquivos de ligação (links) localizados nos diretórios /etc/rc?.d influenciam partida e desligamento do sistema, conforme o conteúdo do readme abaixo:
"quote"
Configuration of System V init under Debian GNU/Linux
Most Unix versions have a file here that describes how the scripts
in this directory work, and how the links in the /etc/rc?.d/ directories
influence system startup/shutdown.
For Debian, this information is contained in the policy manual, chapter
"System run levels and init.d scripts". The Debian Policy Manual is
available at:
http://www.debian.org/doc/debian-policy/#contents
The Debian Policy Manual is also available in the Debian package
"debian-policy". When this package is installed, the policy manual can be
found in directory /usr/share/doc/debian-policy. If you have a browser
installed you can probably read it at
file://localhost/usr/share/doc/debian-policy/
Some more detailed information can also be found in the files in the
/usr/share/doc/sysv-rc directory.
Debian Policy dictates that /etc/init.d/*.sh scripts must work properly
when sourced. The following additional rules apply:
* /etc/init.d/*.sh scripts must not rely for their correct functioning
on their being sourced rather than executed. That is, they must work
properly when executed too. They must include "#!/bin/sh" at the top.
This is useful when running scripts in parallel.
* /etc/init.d/*.sh scripts must conform to the rules for sh scripts as
spelled out in the Debian policy section entitled "Scripts" (§10.4).
Use the update-rc.d command to create symbolic links in the /etc/rc?.d
as appropriate. See that man page for more details.
All init.d scripts are expected to have a LSB style header documenting
dependencies and default runlevel settings. The header look like this
(not all fields are required):
### BEGIN INIT INFO
# Provides: skeleton
# Required-Start: $remote_fs $syslog
# Required-Stop: $remote_fs $syslog
# Should-Start: $portmap
# Should-Stop: $portmap
# X-Start-Before: nis
# X-Stop-After: nis
# Default-Start: 2 3 4 5
# Default-Stop: 0 1 6
# X-Interactive: true
# Short-Description: Example initscript
# Description: This file should be used to construct scripts to be
# placed in /etc/init.d.
### END INIT INFO
More information on the format is available from insserv(8). This
information is used to dynamicaly assign sequence numbers to the
boot scripts and to run the scripts in parallel during the boot.
See also /usr/share/doc/insserv/README.Debian.
"unquote"
Antes de partir para apagar ou renomear algum dos arquivos, melhor dar uma pesquisada melhor, pois se você desabilitar algum item crítico o sistema pode não re-iniciar. Neste caso a solução será inicializar a partir de alguma midia-live e re-editar o arquivo que você alterou para que volte a operar normalmente.
Quando tenho alguma dúvida deste tipo normalmente faço isto, renomeio o arquivo e caso ocorra alguma "zica" e a partida do sistema ou algum item importante deixe de funcionar, basta voltar ao arquivo e voltar (re-nomear) ao nome anterior.
