[Novalug] Size of /boot

Derek LaHousse dlahouss@mtu.edu
Wed May 14 22:21:15 EDT 2014


My Latitude boots with EFI to Grub 2.00, which can read an encrypted
disk partition and LVM in that.  It discovers its grub.cfg after
unlocking the disk (LUKS - Cryptsetup), and boots the kernel from the
/ .

Certainly, someone could fake the Grub prompt and get me to write my
password to disk, and then Evil Maid my computer wide open.  It's not
an OPAL drive.

On Wed, May 14, 2014 at 10:06 PM, Jeremy Hoel <jthoel@gmail.com> wrote:
> and that works?  efi can boot to an encrypted partition?  Encrypted by
> hardware?  I didn't know that you could do that.  hummm
>
>
> On Wed, May 14, 2014 at 8:04 PM, Derek LaHousse <dlahouss@mtu.edu> wrote:
>>
>> My /boot is part of / and is inside LVM on an encrypted partition.  I
>> do have an EFI partition, though, and that's 100 MB.
>>
>> Just to be weird.
>>
>> On Wed, May 14, 2014 at 9:43 PM, Jeremy Hoel <jthoel@gmail.com> wrote:
>> > /var i kept separate and /var/log and /var/log/audit also (the last more
>> > for
>> > compliance with DoD type standards).. I've had /var/ fill up with
>> > something
>> > going bacd but could see messages in /var/log which is nice.
>> >
>> > /usr I don't bother with pulling out of /
>> >
>> > Other things I do..
>> > /home is separate 95% of the time.
>> > /tmp is tmpfs and /var/tmp is a pointer to that
>> >
>> >
>> >
>> >
>> >
>> >
>> > On Wed, May 14, 2014 at 7:26 PM, greg pryzby <greg@pryzby.org> wrote:
>> >>
>> >> /usr hasn't been separate for at least a decade and /var has been for 2
>> >> decades ;)
>> >>
>> >>
>> >> On Wed, May 14, 2014 at 8:57 PM, Jay Hart <jhart@kevla.org> wrote:
>> >>>
>> >>> 500MB seems to be the recommended size for Fedora per the docs. But
>> >>> 250
>> >>> is the minimum.
>> >>>
>> >>> Also, at some point it looks like /usr is not supported as a separate
>> >>> partition anymore, when did
>> >>> this occur, as I've always had /usr as a separate partition.
>> >>>
>> >>> Also /var is now a separate partition which I think I've had as part
>> >>> of /
>> >>> for years now.
>> >>>
>> >>> Shown below is the minimum size:
>> >>>
>> >>> /       2 GB
>> >>> /usr    /usr on a seperate partition is not supported.
>> >>> /tmp    tmpfs by default, 50 MB otherwise.
>> >>> /var    500 MB
>> >>> /home   100 MB
>> >>> /boot   250 MB
>> >>>
>> >>> So, looks like I need to redo my drives.
>> >>>
>> >>> > My /boot is a size 12.  :-)
>> >>> >
>> >>> > For modern OSs, boot of 500mb+ is a good idea. I prefer it be its
>> >>> > own
>> >>> > primary partition and then everything else In various other formats.
>> >>> > On May 14, 2014 6:09 PM, "Jay Hart" <jhart@kevla.org> wrote:
>> >>> >
>> >>> >> My current /boot partition is 100MB.  DU reports 76MB being used.
>> >>> >> The
>> >>> >> file browser reports 7
>> >>> >> items totaling 5.7MB stored in the directory.
>> >>> >>
>> >>> >> Obviously I'm concerned about having enough space (on this
>> >>> >> partition)
>> >>> >> upgrading from Fedora 13 to
>> >>> >> Fedora 20.  If this partition is not big enough I either:
>> >>> >>
>> >>> >> 1. Have to repartition the whole drive (this partition is sda1)
>> >>> >>
>> >>> >> or
>> >>> >>
>> >>> >> 2. Just mount /boot as part of /
>> >>> >>
>> >>> >> / is 10GB, using about 1GB
>> >>> >>
>> >>> >> I've always had /boot mounted on its own partition, but old dogs
>> >>> >> can
>> >>> >> learn
>> >>> >> new tricks.
>> >>> >>
>> >>> >> I'm more inclined to trust DU, but that is big difference from 76MB
>> >>> >> to
>> >>> >> 5.7MB being used, unless
>> >>> >> the 71MB [diff] is the kernel being unpacked and ran upon booting.
>> >>> >>
>> >>> >> Jay
>> >>> >>
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>> >>> >>
>> >>> >
>> >>>
>> >>>
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>> >>
>> >>
>> >>
>> >> --
>> >> greg pryzby                              greg at pryzby dot org
>> >> http://www.linkedin.com/in/gpryzby
>> >>
>> >> TWTR: gpryzby
>> >> WEB:  http://www.MakeRoomForArt.com/
>> >> BLOG: http://lonetrikerphotography.tumblr.com/ (photos)
>> >
>> >
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