HowTo: Turn off SELinux

How do I turn off SELinux (Security-Enhanced Linux) under Linux operating systems?

Open a command-line terminal (select Applications > Accessories > Terminal), and then type the following command. Alternatively, you can login using ssh to remote system and type the same command. You must be root to type the following command:
# echo 0 >/selinux/enforce
You can also use the setenforce command to effectively disable it, enter:
# setenforce Permissive
OR
# setenforce 0
The above commands will switch off SELinux enforcement temporarily until the machine is rebooted. If you would like to make it permanently, edit /etc/sysconfig/selinux, enter:
# vi /etc/sysconfig/selinux
And set / update it as follows:
SELINUX=disabled
Save and close the file. The above will only work in CentOS, Fedora and RedHat Enterprise Linux systems. For all other Linux distros edit your boot loader config file (LILO or GRUB boot loader config file such as /boot/grub/grub.conf). Find the kernel line, append enforcing=0 at the end:

title Red Hat Enterprise Linux Server (2.6.18-194.26.1.el5)
        root (hd0,0)
        kernel /vmlinuz-2.6.18-194.26.1.el5 ro root=LABEL=/ console=tty0 console=ttyS1,19200n8 enforcing=0
        initrd /initrd-2.6.18-194.26.1.el5.img

Finally, reboot the system:
# reboot

Posted by: SXI ADMIN

The author is the creator of SXI LLC and a seasoned sysadmin, DevOps engineer, and a trainer for the Linux operating system/Unix shell scripting. Get the latest tutorials on SysAdmin, Linux/Unix and open source topics via RSS/XML feed or weekly email newsletter.