Where else can tmpfs be mounted besides /tmp?

Dear Cracauer, this let me think, in fact some directories, i could mount read-only.
When i don't install packages /usr/local
When i don't upgrade system /sbin & /bin & /boot

But then maybe /sbin cannot be a mountable read-only partition. Who is gonna mount /sbin , which has /sbin/init ?

Even for /usr zfs mount did not worked, special line needed in fstab.
Code: 
SSD/usr              /usr                zfs         rw                              0   0
 
cracauer@ said:
~//.cache can contain data that, yes, is automatically re-created. But it can be very expensive, for example local LLMs can be stored there and you would have to re-download 100 GB per model. You don't want to do that after every reboot.
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I tend to feel a 100GB model isn't a cache thing. It should be handled as proper data and stored somewhere less volatile.

I do want /var/cache and ~/.cache to be wiped each reboot to avoid clutter building up. Though admittedly, tmpfs and storing all this noise in RAM seems quite wasteful.
 
Kpederson, did analysis,
/tmp , almost nothing
/var/tmp , almost nothing
/home/myuser/.cache ,well half a gigabyte. Why browser. There is the stuff. On reboot let browser take this back.
 
Alain De Vos said:
/home/myuser/.cache ,well half a gigabyte. Why browser. There is the stuff. On reboot let browser take this back.
Click to expand...
Yeah, the crap that the browser generates I am also quite happy to blow away on each reboot.
I would probably opt for @reboot cron task though rather than storing in ram via tmpfs.
 
~/.cache also stores cache of various backup data, like borgbackup or restic. Backups would take much longer if those programs have to rebuild the cache upon their next run (of course depending on your amount of files and data)
 
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