Hi Although the /dev/mapper/vg-shared volume mounts at boot automatically like /root and /home, and although I can open it without having to enter the passphrase again, I cannot create files on it. >From the commands below, that I used to set up /root, /home, and swap mounting at boot with a single passphrase entry, I have tried replacing the command 'sudo mount /dev/vg/ubuntu-root /mnt' with 'sudo mount /dev/vg/shared /mnt' but then when i go onto the next command 'sudo chroot /mnt mount /proc' it gives me the error 'chroot: failed to run command ‘mount’: No such file or directory'. Can anyone tell me how I should edit the following commands so that /dev/vg/-shared not only mounts at boot, but I can also write to it? Is my encryption method below best practice, apart from needing to run cryptsetup first? Is there anyway to have the partition appear as /media/daire/shared instead of a long /media/daire/long-hex-string? sudo cryptsetup luksOpen /dev/sda6 enc-pv Enter passphrase for /dev/sda6: sudo mount /dev/vg/ubuntu-root /mnt sudo chroot /mnt mount /proc sudo mount --bind /dev /mnt/dev sudo chroot /mnt mount /boot sudo echo "enc-pv UUID=`sudo blkid -s UUID -o value /dev/sda6` none luks" | sudo tee -a /mnt/etc/crypttab enc-pv UUID=ad8b8a32-95ea-4add-abe6- 326d151e30fa none luks sudo chroot /mnt update-initramfs -u update-initramfs: Generating /boot/initrd.img-3.13.0-24-generic sudo umount /mnt/proc /mnt/dev /mnt/boot /mnt Would it messy to just use something like sudo chown -R $daire:$daire /mnt/shared ? ================================================================================== If you need more information the following is how I have encrypted the /root, /home, and swap partitions on a disk already containing Windows 8.1 and only require a single passphrase entry on boot: (I have read the Ubuntu alternate install CD used to offer this option before Canonical cancelled it) I create 500 MiB ext4 sda5 partition that will later be assigned as /boot (UEFI Win 8.1 partitions on sda1, sda2, sda3, and sda4) sudo dd if=/dev/urandom of=/dev/sda6 12 hours elapse. dd: writing to ‘/dev/sda6’: No space left on device 660092929+0 records in 660092928+0 records out 337967579136 bytes (338 GB) copied, 39571.4 s, 8.5 MB/s[/CODE] [modprobe dm-crypt modprobe aes-x86_64 modprobe sha256 When I do this over I will run cryptsetup benchmark first to see which iteration and algorithm works best for my system. sudo cryptsetup luksFormat /dev/sda6 WARNING! ======== This will overwrite data on /dev/sda6 irrevocably. Are you sure? (Type uppercase yes): YES Enter passphrase: Verify passphrase: sudo cryptsetup luksOpen /dev/sda6 enc-pv Enter passphrase for /dev/sda6: sudo pvcreate /dev/mapper/enc-pv Physical volume "/dev/mapper/enc-pv" successfully created sudo vgcreate vg /dev/mapper/enc-pv Volume group "vg" successfully created sudo lvcreate -L 8.5G -n swap vg Logical volume "swap" created sudo lvcreate -L 20G -n ubuntu-root vg Logical volume "ubuntu-root" created sudo lvcreate -L 50G -n ubuntu-home vg Logical volume "ubuntu-home" created sudo lvcreate -L 140G -n shared vg Logical volume "shared" created sudo lvdisplay --- Logical volume --- LV Path /dev/vg/swap LV Name swap VG Name vg LV UUID EMSdc1-yTSS-FF9W-5vcv-jEwF-OeF7-5oOoEI LV Write Access read/write LV Creation host, time ubuntu, 2014-04-23 12:57:17 +0000 LV Status available # open 0 LV Size 8.50 GiB Current LE 2176 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:1 --- Logical volume --- LV Path /dev/vg/ubuntu-root LV Name ubuntu-root VG Name vg LV UUID TCPIIE-fGv0-3tz8-XP3R-1c9Z-E18R-XTbcOd LV Write Access read/write LV Creation host, time ubuntu, 2014-04-23 12:58:41 +0000 LV Status available # open 0 LV Size 20.00 GiB Current LE 5120 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:2 --- Logical volume --- LV Path /dev/vg/shared LV Name shared VG Name vg LV UUID dPHDeT-52zj-7bAx-xjzP-p4yC-kXoo-aw7Eac LV Write Access read/write LV Creation host, time ubuntu, 2014-04-23 12:59:50 +0000 LV Status available # open 0 LV Size 140.00 GiB Current LE 35840 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:4 --- Logical volume --- LV Path /dev/vg/ubuntu-home LV Name ubuntu-home VG Name vg LV UUID pWFs3D-MXrh-bMez-68r0-4yPc-zMTo-MGhNF1 LV Write Access read/write LV Creation host, time ubuntu, 2014-04-23 13:06:11 +0000 LV Status available # open 0 LV Size 50.00 GiB Current LE 12800 Segments 1 Allocation inherit Read ahead sectors auto - currently set to 256 Block device 252:3 sudo vgdisplay | grep -i free Free PE / Size 24641 / 96.25 GiB[/CODE] sudo mkfs.ext4 /dev/mapper/vg-shared mke2fs 1.42.9 (4-Feb-2014) Filesystem label= OS type: Linux Block size=4096 (log=2) Fragment size=4096 (log=2) Stride=0 blocks, Stripe width=0 blocks 9175040 inodes, 36700160 blocks 1835008 blocks (5.00%) reserved for the super user First data block=0 Maximum filesystem blocks=4294967296 1120 block groups 32768 blocks per group, 32768 fragments per group 8192 inodes per group Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872 Allocating group tables: done Writing inode tables: done Creating journal (32768 blocks): done Writing superblocks and filesystem accounting information: done There was similar output for: sudo mkfs.ext4 /dev/mapper/vg-ubuntu-root sudo mkfs.ext4 /dev/mapper/vg-ubuntu-home I may have needed to add an extra hyphen, like vg-ubuntu--root Next I opened the Ubuntu 14.04 installer and selected 'something else'. I assigned /boot to the 500 MiB partition on sda5 and then /root, /home, and swap to the logical /dev/mapper/vg volumes. After Ubuntu installs, before rebooting from the live USB, I entered the following: sudo cryptsetup luksOpen /dev/sda6 enc-pv Enter passphrase for /dev/sda6: sudo mount /dev/vg/ubuntu-root /mnt sudo chroot /mnt mount /proc sudo mount --bind /dev /mnt/dev sudo chroot /mnt mount /boot sudo echo "enc-pv UUID=`sudo blkid -s UUID -o value /dev/sda6` none luks" | sudo tee -a /mnt/etc/crypttab enc-pv UUID=ad8b8a32-95ea-4add-abe6-326d151e30fa none luks sudo chroot /mnt update-initramfs -u update-initramfs: Generating /boot/initrd.img-3.13.0-24-generic sudo umount /mnt/proc /mnt/dev /mnt/boot /mnt On reboot Ubuntu boots asking for only one entry of the passphrase instead of three, one for each encrypted volume. ================================================================== Thanks _______________________________________________ dm-crypt mailing list dm-crypt@xxxxxxxx http://www.saout.de/mailman/listinfo/dm-crypt
