Difference between revisions of "Universally unique identifier (UUID)"
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* Block device UUID: <code>[[lsblk]] -io KNAME,TYPE,SIZE,MODEL,UUID</code> | * Block device UUID: <code>[[lsblk]] -io KNAME,TYPE,SIZE,MODEL,UUID</code> | ||
* [[LVM]] [[PV]] UUID: <code>[[pvdisplay]]</code> | * [[LVM]] [[PV]] UUID: <code>[[pvdisplay]]</code> | ||
| + | |||
| + | * <code>[[blkid -s]] [[UUID]] -o value /dev/vdb1655</code> | ||
| + | |||
| + | * uuid=`findmnt /mnt/your_path -o UUID -n` | ||
== EXT4 filesystem == | == EXT4 filesystem == | ||
| Line 43: | Line 47: | ||
<code>[[pvchange]] --[[uuid]]</code> Generate new random UUID for specified PVs. | <code>[[pvchange]] --[[uuid]]</code> Generate new random UUID for specified PVs. | ||
| + | |||
| + | == Related terms == | ||
| + | * https://datatracker.ietf.org/doc/html/draft-peabody-dispatch-new-uuid-format-04#name-uuid-version-7 | ||
| + | * <code>[[/etc/fstab]]</code> | ||
| + | * <code>[[uuid]]</code> [[node.js]] [[module]] | ||
| + | * <code>[[uuidgen]]</code> | ||
| + | * [[Kubernetes UID]] | ||
| + | * [[Elasticsearch index]]: <code>[[curl -k "https://localhost:9200/_cat/indices?v&health=red]]" -u'XXX:UUU'</code> | ||
| + | * [[ULID]] | ||
== See also == | == See also == | ||
| + | * {{mount}} | ||
| + | * {{Filesystems}} | ||
* {{fs}} | * {{fs}} | ||
| − | |||
* <code>[[libuuid]]</code> provided by <code>[[util-linux]]</code> package | * <code>[[libuuid]]</code> provided by <code>[[util-linux]]</code> package | ||
* {{multipath}} | * {{multipath}} | ||
* [[PTUUID]] and [[PARTUUID]] | * [[PTUUID]] and [[PARTUUID]] | ||
| + | * {{UUID}} | ||
[[Category:Linux]] | [[Category:Linux]] | ||
Latest revision as of 12:09, 14 May 2023
Universally unique identifier (UUID)
- Filesystem UUID
- Block device UUID:
lsblk -io KNAME,TYPE,SIZE,MODEL,UUID - LVM PV UUID:
pvdisplay
- uuid=`findmnt /mnt/your_path -o UUID -n`
Contents
EXT4 filesystem[edit]
mkfs.ext4 /dev/vg01/lv01 mke2fs 1.44.1 (24-Mar-2018) Creating filesystem with 2441850880 4k blocks and 305233920 inodes Filesystem UUID: e6742357-a181-4b82-837f-9a01f3e52568 Superblock backups stored on blocks: 32768, 98304, 163840, 229376, 294912, 819200, 884736, 1605632, 2654208, 4096000, 7962624, 11239424, 20480000, 23887872, 71663616, 78675968, 102400000, 214990848, 512000000, 550731776, 644972544, 1934917632 Allocating group tables: done Writing inode tables: done Creating journal (262144 blocks): done Writing superblocks and filesystem accounting information: done
LVM[edit]
--- Physical volume --- PV Name /dev/sdc3 VG Name rhvh PV Size <7.28 TiB / not usable 3.00 MiB Allocatable yes PE Size 4.00 MiB Total PE 1907390 Free PE 25600 Allocated PE 1881790 PV UUID Tk3lEU-NzHl-miXe-bKNk-wcNN-vvou-nM0IGD
pvcreate --uuid "FmGRh3-zhok-iVI8-7qTD-S5BI-MAEN-NYM5Sk" --restorefile /etc/lvm/archive/VG_00050.vg /dev/sdh1 Physical volume "/dev/sdh1" successfully created
pvchange --uuid Generate new random UUID for specified PVs.
Related terms[edit]
- https://datatracker.ietf.org/doc/html/draft-peabody-dispatch-new-uuid-format-04#name-uuid-version-7
/etc/fstabuuidnode.js moduleuuidgen- Kubernetes UID
- Elasticsearch index:
curl -k "https://localhost:9200/_cat/indices?v&health=red" -u'XXX:UUU' - ULID
See also[edit]
- File systems:
mount,umount,findmnt,find,swapon,swapoff,UUID, blkid, mount options:/etc/fstab,udisksctl mount,guestmount,/proc/mounts,fstrim,systemd-mount,defaults - File systems: clustered file system,
tune2fsmkfs.ext4,superblock, e2fsck,resize2fs,mount,df,umount, UUID,fstab - File systems:
ext4,XFS,ZFS,btrfs,wipefs,findfs,HDFS,overlay,aufs,virt-filesystems, Windows: (FAT, NTFS, ReFS), GPFS, squashfs, Ecryptfs, Encfs, FUSE, VMFS, Comparison of distributed file systems, Userspace filesystem, Resize filesystem size libuuidprovided byutil-linuxpackagemultipath,multipathd,mpathpersist,WWIDS,/etc/multipath.conf- PTUUID and PARTUUID
- UUID,
uuidgen, uuid-ossp (PostgreSQL), ULID
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