December 2018
Beginner
320 pages
8h 57m
English
Content preview from CentOS Quick Start Guide
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Masking services
To prevent conflict between similar types of services that perform a certain function, masking is used. For example, for a firewall, CentOS 7 has both iptables and firewalld services; however, it is recommended to use only one at a time. Hence, one of the two firewall services is masked to prevent conflict between the two services. Masks prevent the accidental startup of a service by creating a symlink of the service file to /dev/null as shown in the following screenshot:
If a service is disabled, it will not get started automatically at boot even by other unit files; however, a user can still start that service manually. ...
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