According to Red Hat, a certified system administrator (RHCSA) should be able to perform below task without any issue.

• Operate running systems, including booting into different run levels, identifying processes, starting and stopping virtual machines, and controlling services.
• Configure local storage using partitions and logical volumes.
• Create and configure file systems and file system attributes, such as permissions, encryption, access control lists, and network file systems.
• Deploy, configure, and maintain systems, including software installation, update, and core services.
• Manage users and groups, including use of a centralized directory for authentication.
• Manage security, including basic firewall and SELinux configuration.