Posts Tagged "centos"

How to auto start services on boot in Centos / Redhat?

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

Open Port 80 for Apache in iptables on Centos or Red Hat

Run the following command while logged in as root or sudo:

#Open port 80
/sbin/iptables -I RH-Firewall-1-INPUT 3 -p tcp -m tcp –dport 80 –tcp-flags SYN,RST,ACK SYN -j ACCEPT

#Make the changes permanent
/sbin/iptables-save