Can't start mysqld using systemctl: | Permission Denied 01. Check SELinux is enforced or not using following command, if the value is enforced means SELinux is enforced. #getenforce 02. Edit file /etc/selinux/config and set SELINUX=permissive 03. Reboot server, and type following command to see value permissive. #getenforce 05. Check status using following command #sestatus 04. Execute following command to start mysqld #sysetmctl start mysqld Explore more how to disable SELinux at following link https://access.redhat.com/documentation/en-us/red_hat_enterprise_linux/6/html/security-enhanced_linux/sect-security-enhanced_linux-working_with_selinux-changing_selinux_modes
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