[SOLVED]Grub claims it can't find /etc/os-release

[seasons]

When I run update-grub, I get:

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/usr/sbin/grub-mkconfig: 1: /etc/default/grub:  . /etc/os-release : not found


/etc/os-release is a valid file though (link to /usr/lib/os-release)/
It's a good thing I kept the old line, because that still works. Is this a bug or did I do something wrong?

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GRUB_DEFAULT=0
GRUB_TIMEOUT=10
#GRUB_DISTRIBUTOR=`( . /etc/os-release; echo ${NAME:-Debian} ) 2>/dev/null || echo Debian`
GRUB_DISTRIBUTOR=`( . /etc/os-release && echo ${NAME} )`
GRUB_CMDLINE_LINUX_DEFAULT="quiet"
GRUB_CMDLINE_LINUX=""

[dibl]

Three siduction systems updated so far today -- no problems with any packages including grub.

[eriefisher]

Just checked and my file is different from yours. Not sure why?

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GRUB_DEFAULT=0
GRUB_TIMEOUT=5
GRUB_DISTRIBUTOR=`lsb_release -i -s 2> /dev/null || echo Debian`
GRUB_CMDLINE_LINUX_DEFAULT="quiet resume=UUID=6b753de0-cd23-44f9-96d7-8b69f53a09ff systemd.show_status=1"
GRUB_CMDLINE_LINUX=""

What do you get when you run:

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. /etc/os-release && echo ${NAME}

[scholle1]

Hi @seasons.
Your query is unclear.
Which is your old line?
The commented-out line contains the better function.

With
# ls -l /etc/os-ralease
you can recognize whether it is a file or a link, or a broken link.

For both lines with "GRUB_DISTRIBUTOR", grub terminates with an error message if /etc/os-ralease is not found. Only the error message differs.
Therefore: Check the files or the link. (/etc/os-ralease and /usr/lib/os-release)

[seasons]

Which is your old line?

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GRUB_DISTRIBUTOR=`( . /etc/os-release; echo ${NAME:-Debian} ) 2>/dev/null || echo Debian`

The new line was what I copied when apt prompted me to keep the old version or install the new one (because I increased the timeout).

With
# ls -l /etc/os-release
you can recognize whether it is a file or a link, or a broken link.

Yes, /etc/os-release is a valid file (link to /usr/lib/os-release, which is also a valid file).

Just checked and my file is different from yours. Not sure why?

I don't know why either, but I just changed it to:

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GRUB_DISTRIBUTOR="Debian"
Good enough for me. It seems like this was what the old command was effectively doing anyway since the /etc/os-release thing was failing.

Thanks to all who responded.