Error re: tempfs mounted on RAM?

Webmin
1
SYSTEM INFORMATION
OS type and version Tumbleweed Latest
Webmin version 2.660

Just started getting this message on my Dashboard:

      Information!
The filesystem /tmp which contains the Webmin temp files directory /tmp/.webmin is mounted from a tmpfs RAM disk, which may be too small for temporary and backup files. Consider switching the temp files location to a different directory in the Webmin Configuration module.

and yet the tmp files directory in configuration is : Default (/tmp/.webmin) , which in my understanding, is on my main root drive, with heaps of space, and IS NOT RAM?
What gives here?
Thanks.

2

Look at the output of df.

3

Have done, no issues…

4

OK, show us the output of df.

5 
john@media:/$ df
Filesystem      1K-blocks       Used Available Use% Mounted on
tmpfs             3124400       7752   3116648   1% /run
/dev/sdc2        66708904   52442532  10831980  83% /
tmpfs             7810996          0   7810996   0% /dev/shm
efivarfs              192         41       147  22% /sys/firmware/efi/efivars
none                 1024          0      1024   0% /run/credentials/systemd-journald.service
none                 1024          0      1024   0% /run/credentials/systemd-resolved.service
tmpfs             7810996         52   7810944   1% /tmp
/dev/sdc3       287255840  196841088  75749896  73% /home
/dev/sda3      1975494060 1563409932 311660808  84% /home/media
/dev/sdc1         1098628       6452   1092176   1% /boot/efi
tmpfs             1562196        192   1562004   1% /run/user/1000
6

That’s not a disk. That’s a RAM filesystem.

7

Which is fine. You just need to configure Webmin to use a different tmp dir, so it has room to breathe.

8

Yeah, sorry, just realized that, as well…
Obviously auto created on install…
How/where, is this mounted?
Thanks.

9

I believe on all modern systems, there is a tmp.mount unit for it. You can see the status with:

systemctl status tmp.mount

I’m not sure how to switch to disk, but I would guess you could just stop/disable that service and /tmp will by default go to your / filesystem, since there wouldn’t be a ram disk mounted on that path, anymore (but the path presumably does exist even without the tmp.mount on top of it).