On Thu 28 Sep 2017 at 10:29:27 (+0200), Pascal Hambourg wrote: > Le 28/09/2017 à 09:39, Jimmy Johnson a écrit : > >On 09/27/2017 02:38 AM, Pascal Hambourg wrote: > >>Le 27/09/2017 à 10:37, Jimmy Johnson a écrit : > > > >>> But if everything is correct and you are using lets say sda1 > >>>as root in your fstab your system will use sda1 as the LABEL, > >>>I've seen this over and over. > >> > >>Nonsense. sda1 is the block device name and does not have > >>anything to do with the LABEL which is a filesystem metadata > >>field. > >> > >>>But all this is advanced setup for people running more than > >>>one Linux system and having to edit UUID on all systems > >>>because you install a new system is undesirable. > >> > >>No it does not have anything to do with multiple Linux systems. > > > >In fstab a label is used as a device name, a uuid is used as a > >device name and /dev/sda1 is a device name, you are just trying to > >make nonsense out of nothing. > > A label or a UUID are not really used as device names, they are used > *instead* of a device name. > > Anyway, this is not the same as what you wrote earlier and is pure > nonsense : > > "your system will use sda1 as the LABEL" > > Unless you meant "define 'sda1' as the filesystem/swap label and use > LABEL='sda1' in /etc/fstab", which is a really bad use of labels > leading to confusion between labels and device names. Labels are > meant to be explicit about the contents, not the container. > > >And editing multiple fstab config files because I've installed a > >new system is, like I said undesirable and why I use device names > >in both my fstab and grub boot menu. As you know when a new > >system is installed swap is formatted and it's uuid gets changed > >every time it's formatted. > > The Debian installer does this, but I am not sure that all other > distro installers do the same. Moreover, the Debian installer will > format an existing swap only if that swap is marked for use (the > trick is that all existing swaps are automatically marked for use by > default, so you have to pay attention and unmark them if you do not > want them to be formatted). IMO this is a real bug in the installer. > > So my general policy when installing Debian is to mark any existing > swap as "not used", and if I want to share an existing swap, I add > the line manually in /etc/fstab in the new system after the > installation.
In the past I have used the VC2 shell to swapon immediately the partitioner has formatted the partitions (but not swap), ie just before "Install the base system". This has never caused a problem for me, but the Installation Guide says: "In particular, you should always use [sic] let the installer activate your swap partition and not do this yourself from a shell." (§6.3.8.2) Any idea why? Cheers, David.
