disable selinux in configuration file grub

 It's easy. Check /etc/default/grub

1) check status of Selinux

[root@localhost ~]# sestatus

SELinux status:                 enabled

SELinuxfs mount:                /sys/fs/selinux

SELinux root directory:         /etc/selinux

Loaded policy name:             targeted

Current mode:                   enforcing

Mode from config file:          enforcing

Policy MLS status:              enabled

Policy deny_unknown status:     allowed

Memory protection checking:     actual (secure)

Max kernel policy version:      33

[root@localhost ~]# cat /etc/default/grub

GRUB_TIMEOUT=5

GRUB_DISTRIBUTOR="$(sed 's, release .*$,,g' /etc/system-release)"

GRUB_DEFAULT=saved

GRUB_DISABLE_SUBMENU=true

GRUB_TERMINAL_OUTPUT="console"

GRUB_CMDLINE_LINUX="crashkernel=auto resume=/dev/mapper/cs-swap rd.lvm.lv=cs/root rd.lvm.lv=cs/swap rhgb quiet selinux=0"

GRUB_DISABLE_RECOVERY="true"

GRUB_ENABLE_BLSCFG=true

2) generating grub

[root@localhost ~]# grub2-mkconfig -o /boot/grub2/grub.cfg

Generating grub configuration file ...

done

3) reboot and pray 

[root@localhost ~]# reboot

login as: root

root@127.0.0.2's password:

Last login: Wed Feb  2 21:40:32 2022 from 10.0.2.2

4) check sestatu after the reboot

[root@localhost ~]# sestatus

SELinux status:                 disabled

[root@localhost ~]# uptime

 21:47:44 up 2 min,  1 user,  load average: 0.16, 0.26, 0.11

[root@localhost ~]#