[arch-general] LUKS on LVM example in wiki
I've been reading the section 'LUKS on LVM' in the wiki page <https://wiki.archlinux.org/index.php/Dm-crypt/Encrypting_an_entire_system> and there's something I fail to understand. Under 'Preparing the logical volumes', there is: # lvcreate -L 500M -n tmp MyVol (which isn't shown in the ascii picture just above). Later, under 'Configuring fstab and crypttab' a tmpfs is created on the encrypted /tmp partition: dev/mapper/tmp /tmp tmpfs defaults 0 0 Question: as far as I've understood, a tmpfs resides in RAM, with overflow to /swap. So why is there a logical volume for /tmp ? Or put otherwise, if /tmp is to reside on disk, why use a tmpfs ? TIA, -- FA A world of exhaustive, reliable metadata would be an utopia. It's also a pipe-dream, founded on self-delusion, nerd hubris and hysterically inflated market opportunities. (Cory Doctorow)
Hello FA, Did you get an answer to your question? Let me know if you still need help. BMG Brett M. Gilio B.S. Biological Sciences B.M. Music Composition http://www.brettgilio.com/ "Sometimes the obvious is the enemy of the true." - G. Stolzenberg On 11/19/2017 09:53 AM, Fons Adriaensen wrote:
I've been reading the section 'LUKS on LVM' in the wiki page
<https://wiki.archlinux.org/index.php/Dm-crypt/Encrypting_an_entire_system>
and there's something I fail to understand.
Under 'Preparing the logical volumes', there is:
# lvcreate -L 500M -n tmp MyVol
(which isn't shown in the ascii picture just above).
Later, under 'Configuring fstab and crypttab' a tmpfs is created on the encrypted /tmp partition:
dev/mapper/tmp /tmp tmpfs defaults 0 0
Question: as far as I've understood, a tmpfs resides in RAM, with overflow to /swap. So why is there a logical volume for /tmp ? Or put otherwise, if /tmp is to reside on disk, why use a tmpfs ?
TIA,
participants (2)
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Brett M. Gilio
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Fons Adriaensen