On 20100322_020950, Ron Johnson wrote: > On 2010-03-21 23:51, Paul E Condon wrote: > >On 20100321_181749, Ron Johnson wrote: > >>On 2010-03-21 17:52, Tom H wrote: > >>>>>>*You* should not need to set the UUID. It should just magically be > >>>>>>there. > >>>>>>$ /sbin/blkid -t TYPE=swap > >>>>>>/dev/sdb1: TYPE="swap" LABEL="swap1" \ > >>>>>>UUID="c69f59ff-b928-4232-b44c-8da0f12c52db" > >>>>>You can cnahe the UUID of any ext partition with > >>>>cnahe??? > >>>It is Sunday and my first weekend off in a few weeks so my fingers are > >>>on holiday... > >>> > >>> > >>>>>tune2fs -U <uuid> /dev/... > >>>>But you're *not* supposed to *need* to, > >>>You do need to do so if you install a second/third/fourth... > >>>distribution or version and mkswap changes the UUID of the swap > >>I'd want *proof* (i.e., booting into different distros) that > >>different mkswap invocations generate different UUIDs. > >> > > > >My reading of man mkswap is that if you don't use the -U option, the > >program generates a new, random UUID. Debian will change it's own UUID > >if you re-execute mkswap on the same partition, and all other distros > >are likely to do the same. > > > > Huh, you're right! > > $ date && /sbin/blkid -t TYPE=swap > Mon Mar 22 01:59:13 CDT 2010 > /dev/sdb1: TYPE="swap" LABEL="swap1" \ > UUID="c69f59ff-b928-4232-b44c-8da0f12c52db" > > # date && mkswap /dev/sdb1 > Mon Mar 22 01:59:46 CDT 2010 > Setting up swapspace version 1, size = 2000056 KiB > no label, UUID=7adf36e1-ec23-4eac-b49c-5c06c0439a10 > > $ date && /sbin/blkid -t TYPE=swap > Mon Mar 22 02:00:32 CDT 2010 > /dev/sdb1: TYPE="swap" LABEL="swap1" \ > UUID="7adf36e1-ec23-4eac-b49c-5c06c0439a10" > > # mkswap -L foobar /dev/sdb1 > Setting up swapspace version 1, size = 2000056 KiB > LABEL=foobar, UUID=25c86597-cdd4-48c9-9543-0d50590848f8 > > $ date && /sbin/blkid -t TYPE=swap > Mon Mar 22 02:04:49 CDT 2010 > /dev/sdb1: TYPE="swap" LABEL="foobar" \ > UUID="25c86597-cdd4-48c9-9543-0d50590848f8" > > > > >>>partition (although I _think_ that you can use "mkswap -U <uuid>") and > >>>you therefore have to boot without swap from your previous install(s). > >>> > >>Or... use a LABEL. > >> > > > >I don't see a way to apply a label to a swap partition. Where can I > >find out about such? > > > > mkswap -L foobar /dev/XXYn > > > What I'd do is: > > # swapoff /dev/XXYn > > # mkswap -L foobar /dev/XXYn > > # vi /etc/fstab > > # vi /mnt/other_distro/etc/fstab >
Thanks Ron, You answered my question --- I didn't know about blkid utility. With this one can give every partition a meaningful labels like --- LABEL="hda1" or whatever is displayed as the system device one one runs blkid without options in order to get a full listing. e.g. cmpq:~# blkid /dev/hda1: UUID="990189bc-f7ce-41a6-9d8f-64a35349875e" TYPE="ext3" /dev/hda2: LABEL="HDA2" UUID="5a02e986-8aa3-4790-aa3f-41f7f565533f" TYPE="ext3" /dev/hda3: LABEL="HDA3" UUID="63025622-0210-49d4-89ff-f038e6c218b6" TYPE="ext3" /dev/hda5: TYPE="swap" /dev/hda6: LABEL="HDA6" UUID="12148027-bc0b-4260-853e-64a8d79c6fe7" TYPE="ext3" /dev/hdb1: UUID="29b36e91-32e7-46bd-b8d3-831f5dcbd337" TYPE="ext3" /dev/sda1: LABEL="WDMB-1" UUID="bc1d2170-d790-4952-bbee-c3c3efdd8413" TYPE="ext3" /dev/sdb1: LABEL="WDP-5" UUID="8c6c3be3-4a72-45cd-929f-2dec9f185427" TYPE="ext3" This is from a system that is running Lenny. Note that the swap partition doesn't have either a label or a uuid, but I had specified labels each time I installed a distro. -- Paul E Condon pecon...@mesanetworks.net -- To UNSUBSCRIBE, email to debian-user-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org Archive: http://lists.debian.org/20100322220557.gc29...@big.lan.gnu
