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Vagy csinalhatsz virtualis filerendszereket amiket titkositasz... A lenti példa végigviszi hogyan tudsz csinálni lvm csoportokat. Itt most létrehozok 2x300 megát, amiket összekapcsolok egy lvm csoportba és úgy használom. Ezen végül lehet akár titkosított a fájlrendszer is. Elég ezeket a kis fájlokat lementeni, amit kicsit könnyebb mint modjuk eg…
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| root@yitsushi:~# dd if=/dev/zero of=myfilesystem.1 bs=1M count=300 | |
| 300+0 records in | |
| 300+0 records out | |
| 314572800 bytes (315 MB) copied, 1.67623 s, 188 MB/s | |
| root@yitsushi:~# dd if=/dev/zero of=myfilesystem.2 bs=1M count=300 | |
| 300+0 records in | |
| 300+0 records out | |
| 314572800 bytes (315 MB) copied, 1.40912 s, 223 MB/s | |
| root@yitsushi:~# mke2fs -j myfilesystem.1 | |
| mke2fs 1.42 (29-Nov-2011) | |
| myfilesystem.1 is not a block special device. | |
| Proceed anyway? (y,n) y | |
| Discarding device blocks: done | |
| Filesystem label= | |
| OS type: Linux | |
| Block size=1024 (log=0) | |
| Fragment size=1024 (log=0) | |
| Stride=0 blocks, Stripe width=0 blocks | |
| 76912 inodes, 307200 blocks | |
| 15360 blocks (5.00%) reserved for the super user | |
| First data block=1 | |
| Maximum filesystem blocks=67633152 | |
| 38 block groups | |
| 8192 blocks per group, 8192 fragments per group | |
| 2024 inodes per group | |
| Superblock backups stored on blocks: | |
| 8193, 24577, 40961, 57345, 73729, 204801, 221185 | |
| Allocating group tables: done | |
| Writing inode tables: done | |
| Creating journal (8192 blocks): done | |
| Writing superblocks and filesystem accounting information: done | |
| root@yitsushi:~# mke2fs -j myfilesystem.2 | |
| mke2fs 1.42 (29-Nov-2011) | |
| myfilesystem.2 is not a block special device. | |
| Proceed anyway? (y,n) y | |
| Discarding device blocks: done | |
| Filesystem label= | |
| OS type: Linux | |
| Block size=1024 (log=0) | |
| Fragment size=1024 (log=0) | |
| Stride=0 blocks, Stripe width=0 blocks | |
| 76912 inodes, 307200 blocks | |
| 15360 blocks (5.00%) reserved for the super user | |
| First data block=1 | |
| Maximum filesystem blocks=67633152 | |
| 38 block groups | |
| 8192 blocks per group, 8192 fragments per group | |
| 2024 inodes per group | |
| Superblock backups stored on blocks: | |
| 8193, 24577, 40961, 57345, 73729, 204801, 221185 | |
| Allocating group tables: done | |
| Writing inode tables: done | |
| Creating journal (8192 blocks): done | |
| Writing superblocks and filesystem accounting information: done | |
| root@yitsushi:~# file myfilesystem.* | |
| myfilesystem.1: Linux rev 1.0 ext3 filesystem data, UUID=44ac0731-5e75-48c8-94c3-3b863d6ddccd | |
| myfilesystem.2: Linux rev 1.0 ext3 filesystem data, UUID=b77eaf90-d20d-40f9-a78c-0854965196d3 | |
| root@yitsushi:~# losetup -sf myfilesystem.1 | |
| /dev/loop0 | |
| root@yitsushi:~# losetup -sf myfilesystem.2 | |
| /dev/loop1 | |
| root@yitsushi:~# losetup -a | |
| /dev/loop0: [fd00]:1193129 (/root/myfilesystem.1) | |
| /dev/loop1: [fd00]:1193092 (/root/myfilesystem.2) | |
| root@yitsushi:~# pvcreate /dev/loop0 | |
| Physical volume "/dev/loop0" successfully created | |
| root@yitsushi:~# vgcreate myfiles /dev/loop0 | |
| Volume group "myfiles" successfully created | |
| root@yitsushi:~# lvcreate -L250M myfiles | |
| Rounding up size to full physical extent 252.00 MiB | |
| Logical volume "lvol0" created | |
| root@yitsushi:~# mkfs.ext3 /dev/myfiles/lvol0 | |
| mke2fs 1.42 (29-Nov-2011) | |
| Discarding device blocks: done | |
| Filesystem label= | |
| OS type: Linux | |
| Block size=1024 (log=0) | |
| Fragment size=1024 (log=0) | |
| Stride=0 blocks, Stripe width=0 blocks | |
| 64512 inodes, 258048 blocks | |
| 12902 blocks (5.00%) reserved for the super user | |
| First data block=1 | |
| Maximum filesystem blocks=67371008 | |
| 32 block groups | |
| 8192 blocks per group, 8192 fragments per group | |
| 2016 inodes per group | |
| Superblock backups stored on blocks: | |
| 8193, 24577, 40961, 57345, 73729, 204801, 221185 | |
| Allocating group tables: done | |
| Writing inode tables: done | |
| Creating journal (4096 blocks): done | |
| Writing superblocks and filesystem accounting information: done | |
| root@yitsushi:~# vgextend myfiles /dev/loop1 | |
| No physical volume label read from /dev/loop1 | |
| Physical volume "/dev/loop1" successfully created | |
| Volume group "myfiles" successfully extended | |
| root@yitsushi:~# lvextend -L+300M /dev/myfiles/lvol0 | |
| Extending logical volume lvol0 to 552.00 MiB | |
| Logical volume lvol0 successfully resized | |
| root@yitsushi:~# resize2fs /dev/myfiles/lvol0 | |
| resize2fs 1.42 (29-Nov-2011) | |
| Resizing the filesystem on /dev/myfiles/lvol0 to 565248 (1k) blocks. | |
| The filesystem on /dev/myfiles/lvol0 is now 565248 blocks long. | |
| root@yitsushi:~# mkdir /secret | |
| root@yitsushi:~# mount /dev/myfiles/lvol0 /secret/ | |
| root@yitsushi:~# df -h | |
| Filesystem Size Used Avail Use% Mounted on | |
| .... .... .... | |
| .... .... .... | |
| /dev/mapper/myfiles-lvol0 535M 6.3M 501M 2% /secret | |
| root@yitsushi:~# |
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