From: kant@have.it   
      
   Sorry for the length.  The examples are strange, 3 different computers with 3   
   different post boot /dev layouts.  Maybe I'm just over complicating things.   
      
   > Why did you think that fstab would be modified by login?   
      
   I would think not.  Part of the fstab looks like this:   
   UUID=c9b1c553-03b5-406d-bd1e-7591aa0c659f       swap    swap    defaults 0 0   
   UUID=ee9017b6-622c-42b9-b42e-f6a77981f1a7       /       btrfs   defaults 0 0   
   UUID=ee9017b6-622c-42b9-b42e-f6a77981f1a7       /boot/grub2/i386-pc     btrfs   
   subvol=@/boot/grub2/i386-pc 0 0   
      
   Which is OK, a df says this:   
   /dev/sda7        41G   24G   15G  62% /   
   /dev/sda7        41G   24G   15G  62% /.snapshots   
   /dev/sda7        41G   24G   15G  62% /var/lib/mariadb   
   ...   
   /dev/sdb1       3.7T  2.7T  1.1T  72% /run/media/sidney/4TB   
      
   Which should be swell, but sometimes during the boot process it takes /dev/sdb   
   and uses it instead of /dev/sda.   
      
   Then when the USB is mounted it uses /dev/sda, unless I don't login in which   
   case it a df will show me nothing about the USB.   
      
   Whereas:   
   lsblk -fi   
   NAME   FSTYPE LABEL            UUID                                 MOUNTPOINT   
   sda   
   |-sda1 vfat                    7628-FF10                            /boot/efi   
   |-sda2   
   |-sda3 ntfs   Windows          0EC02BA6C02B934F   
   |-sda4 ntfs   Windows RE tools 442EEABB2EEAA560   
   |-sda5 ntfs   RECOVERY         6A966749966714BB   
   |-sda6 swap                    c9b1c553-03b5-406d-bd1e-7591aa0c659f [SWAP]   
   |-sda7 btrfs                   ee9017b6-622c-42b9-b42e-f6a77981f1a7 /var/opt   
   `-sda8 xfs                     d6b8a04f-a23e-4462-b3d1-964a395178d8 /home   
   sdb   
   `-sdb1 ntfs   4TB              7CD4EE17D4EDD404 /run/media/sidney/4TB   
   sdc   
   `-sdc1 ntfs   PNY16GB          740C30A17C89431B /run/media/sidney/PNY16GB   
   sr0   
      
   Will tell me where the USBs are (mounted in this case), and then I can use the   
   after.local to mount the device on a known mount point.  I'm not sure what to   
   put into the fstab, especially since things seem to change during the boot   
   process.:   
      
   This is what an unmounted USB on another computer looks like:   
   sda   
   |-sda1   
   `-sda2 btrfs  1TB              9ba44c12-6c45-41f3-9737-67ec889469c5   
      
   With two or three greps and a cut I can get this:   
   sdb2 btrfs 1TB 9ba44c12   
   The important information is in the first 3 fields.  More to be done but I can   
   work on that tomorrow and ultimately I think I can use the after.local to mount   
   the device on a known mount point so that NFS can share it.  Irregardless of   
   whether or not someone is logged in to put it into the /run/media/who/label or   
   they're kind of somewhere in the system and I have to find it.  Which is what   
   this whole debacle is about.   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)