A Linux administrator is investigating the reason a system timer is not running every night at midnight. The administrator reviews the following unit file: Which of the following modifications…

The correct answer is C. Change OnCalendar to*-*-* 00:00:00. F. Remove OnCalendar=*-*-01 00:00:00. Changing OnCalendar to -- 00:00:00 ensures the timer fires every day at midnight rather than only on the first of the month. Removing the existing OnCalendar=-*-01 00:00:00 entry clears the incorrect monthly trigger so that the corrected daily schedule takes effect.

Troubleshooting

Question

A Linux administrator is investigating the reason a system timer is not running every night at midnight. The administrator reviews the following unit file: Which of the following modifications should the administrator make in the unit file? (Choose two.)

Exhibit

Options

ARemove RandomizedDelaySec=10800.
BAdd WakeSystem=Midnight.
CChange OnCalendar to*-- 00:00:00.
DAdd OnCalendar=--* daily.
EAdd AccuracySec=1.
FRemove OnCalendar=--01 00:00:00.

How the community answered

(17 responses)

A
6% (1)
C
82% (14)
E
12% (2)

Explanation

Changing OnCalendar to --* 00:00:00 ensures the timer fires every day at midnight rather than only on the first of the month. Removing the existing OnCalendar=--01 00:00:00 entry clears the incorrect monthly trigger so that the corrected daily schedule takes effect.

Topics

#systemd timers#Linux scheduling#Unit files#System administration

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