[CentOS] Running a command at startup

Thu Dec 13 00:11:12 UTC 2018
Leroy Tennison <leroy at datavoiceint.com>

Does your version of CentOS have the @reboot crontab option?  If it does this is probably easier unless you want to learn how to write systemd files.

Leroy Tennison
Network Information/Cyber Security Specialist
E: leroy at datavoiceint.com
2220 Bush Dr
McKinney, Texas
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From: CentOS <centos-bounces at centos.org> on behalf of Robert Moskowitz <rgm at htt-consult.com>
Sent: Wednesday, December 12, 2018 6:04 PM
To: CentOS mailing list
Subject: [EXTERNAL] [CentOS] Running a command at startup

On a support forum, I was told that to turn off my board's blue led run:

echo none | sudo tee /sys/class/leds/blue\:heartbeat/trigger

Well, this does not survive a system reboot.  So I was told:

Add the off bit to


Add it above "exit 0"

So of course, CentOS is past using rc.local and recommends:

# It is highly advisable to create own systemd services or udev rules
# to run scripts during boot instead of using this fi

So can someone point me to how to make this into a simple systemd service?


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