Crontab root file keeps getting appended, RUT955 FW 7.04.2


We have FW 07.04.2 installed on several RUT955 modems.

I used SCP client to browse to /etc/crontabs/ and opened the root file.

I deleted the contents of this file, and put in a 5-minute executing script, which works great:

*/5 * * * * /root/

However, about a week later, the script stopped executing, and I noticed the following text was appended to the file:

33 12 * * 4 /sbin/rut_fota --fw_info >/dev/null 2>&1 #746c74

It was not put on a new line in the file, thus voiding the previous statement I wrote. It was appended to the end with no spaces.

What does this text do, and why was it forcibly put back in the root file? Should I not have cleared the root file’s initial contents, or did I do something wrong? Thanks.


This crontab line is set up to periodically check for new firmware versions. The goal is to see if there are any updates available and provide you with a notification whenever you log in to the device, informing you about the availability of any new firmware.

It should not interfere with the functioning of other crontab lines. Thus, you can simply enter your own crontab tasks right below this one.

Kind Regards,

Thank you for the information.
We will add a new line from now on and leave this line alone.

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