XK0-005 Question #1318: Real Exam Question with Answer & Explanation

Question

A user wants to configure the application "myapp" to start on runlevels 2, 3, 4, and 5 every time the system starts. Which of the following commands will accomplish this task?

Options

• Achkconfig --level 2345 myapp on
• Bsystemctl myapp on 2345
• Cchkcinfig myapp --levels 2-5
• Dsystemctl --levels 2345 on

Explanation

The chkconfig --level command is used to configure services to start or stop at specific runlevels in systems using SysVinit.

Common mistakes.

• B. The systemctl command is used for Systemd services, and its syntax for enabling a service across runlevels is different from the one shown, which is incorrect.
• C. The chkconfig command uses --level followed by the runlevel numbers directly, not --levels 2-5; the syntax --levels 2-5 is incorrect.
• D. The systemctl command is used for Systemd, and the syntax systemctl --levels 2345 on is incorrect for enabling services; systemctl enable myapp typically enables it for all appropriate runlevels by default.

Concept tested. Linux service management (chkconfig/SysVinit)

Reference. https://linux.die.net/man/8/chkconfig

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