Running linux scripts and services during CentOS / Redhat/ Fedora startup

Running commands and shell scripts on startup/boot

Do you need to run a set of commands or a shell script on CentOS / RHEL / Fedora startup?  The easiest way to start a script upon boot is by adding the command to /etc/rc.local (a symbolic link to /etc/rc.d/rc.local).  /etc//rc.local is a script executed after the initial startup services have been executed.

Here’s an example of the /etc/rc.local script:

#!/bin/sh
#
# This script will be executed *after* all the other init scripts.
# You can put your own initialization stuff in here if you don't
# want to do the full Sys V style init stuff.

touch /var/lock/subsys/local

Auto start services on startup/boot

To auto start services in Centos or Redhat OS, you can use builtin chkconfig utility. It is located in /sbin directory. If you are a regular user (non-root), then /sbin may not be in your path. Therefore, you may have to use the full path to access the chkconfig utility.

To auto start a new service:

  • Find out the name of service’s script from /etc/init.d/ directory e.g. mysqld or httpd
  • Add it to chkconfig

    sudo /sbin/chkconfig –add mysqld
  • Make sure it is in the chkconfig.

    sudo /sbin/chkconfig –list mysqld
  • Set it to autostart

    sudo /sbin/chkconfig mysqld on

To stop a service from auto starting on boot

  • sudo /sbin/chkconfig mysqld off

Leave a Reply

Related Post

Aug 20

The Secret in the Bible book puzzle solution

The Secret in the Bible by Tony Bushby has quite a few factual errors and is more of an atheist “push my agenda” type of book rather than a historical review of the subject matter. There was one interesting aspect to the book though. It included a “puzzle” whereby each of the sixteen chapters contained a secret word that when put together in a sentence reveals ancient knowledge so secret, Bushby was not allowed to outright reveal them in his book for fear of some sort of extremely viscous retribution from someone (boy, have I got news for him).

May 04

New 3D Tri-Gate chips coming from Intel

Silicon wafers used in computer chipsets (processors) have typically been two dimensional. On May 4, 2011, Intel announced a 3-D transistor technology, called Tri-Gate, that ensures Moore’s Law, which predicts that chipset transistor density doubles every two years, keeps pace. Dense chipsets allow Intel to pack more computer cycles (with less power usage) onto a single chip. By building above the chip’s surface, Intel can build chipsets that are smaller, faster, and use less power. The Tri-Gate transistors will be used in a line of 22 nanometer processors (code named Ivy Bridge) and ready for production use by 2012.

Aug 20

Detecting and blocking click fraud on asp.net sites

Google policies dictate prevention of click fraud falls on the shoulders of the site owner and bans AdSense accounts for invalid clicks with practically no chance of getting that account back in good standing. Here’s how to detect and prevent invalid clicks on your sites AdSense advertisements.