今天，我们给大家介绍一下，如何重新命名一个类型为swap的逻辑券。
首先，我们先来看一下，系统中的券。
lwk@qwfys:~$ sudo lsblk -l
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mint--vg-root 253:0 0 475.5G 0 lvm /
mint--vg-swap_1 253:1 0 980M 0 lvm [SWAP]
nvme0n1 259:0 0 477G 0 disk
nvme0n1p1 259:1 0 512M 0 part /boot/efi
nvme0n1p2 259:2 0 476.4G 0 part
lwk@qwfys:~$ sudo pvdisplay --- Physical volume ---PV Name /dev/nvme0n1p2VG Name mint-vgPV Size <476.44 GiB / not usable 0 Allocatable yes (but full)PE Size 4.00 MiBTotal PE 121968Free PE 0Allocated PE 121968PV UUID njLf5d-c2k8-4gwQ-HrwG-yb8j-S3CH-293PnQlwk@qwfys:~$ sudo vgdisplay --- Volume group ---VG Name mint-vgSystem ID Format lvm2Metadata Areas 1Metadata Sequence No 7VG Access read/writeVG Status resizableMAX LV 0Cur LV 2Open LV 1Max PV 0Cur PV 1Act PV 1VG Size <476.44 GiBPE Size 4.00 MiBTotal PE 121968Alloc PE / Size 121968 / <476.44 GiBFree PE / Size 0 / 0 VG UUID gbIrR2-xW4a-4zr3-18md-eo9q-BXBw-1tWRD3lwk@qwfys:~$ sudo lvdisplay --- Logical volume ---LV Path /dev/mint-vg/rootLV Name rootVG Name mint-vgLV UUID 1jZgWZ-y3b4-LoTP-H32i-nz5H-A2xh-tYUTMbLV Write Access read/writeLV Creation host, time mint, 2020-05-24 23:39:52 +0800LV Status available# open 1LV Size 475.48 GiBCurrent LE 121723Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253:0--- Logical volume ---LV Path /dev/mint-vg/swap_1LV Name swap_1VG Name mint-vgLV UUID 1SkgwJ-DTZe-XD77-Enlg-CoZz-FX1l-Gz2b3eLV Write Access read/writeLV Creation host, time mint, 2020-05-24 23:39:52 +0800LV Status available# open 2LV Size 980.00 MiBCurrent LE 245Segments 1Allocation inheritRead ahead sectors auto- currently set to 256Block device 253:1lwk@qwfys:~$
上面是我们系统中整个lvm的具体情况，现在我们要做的事就是希望将逻辑券/dev/mint-vg/swap_1重新命名为/dev/mint-vg/swap。
lwk@qwfys:~$ sudo lvremove /dev/mint-vg/swap_1Logical volume mint-vg/swap_1 in use.
lwk@qwfys:~$ sudo swapoff /dev/mint-vg/swap_1
lwk@qwfys:~$ sudo lvremove /dev/mint-vg/swap_1
Do you really want to remove and DISCARD active logical volume mint-vg/swap_1? [y/n]: yLogical volume "swap_1" successfully removed
lwk@qwfys:~$ lsblk -l
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mint--vg-root 253:0 0 475.5G 0 lvm /
nvme0n1 259:0 0 477G 0 disk
nvme0n1p1 259:1 0 512M 0 part /boot/efi
nvme0n1p2 259:2 0 476.4G 0 part
lwk@qwfys:~$
lwk@qwfys:~$ sudo lvcreate -L 8G -n mint-vg-swap mint-vgVolume group "mint-vg" has insufficient free space (245 extents): 2048 required.
lwk@qwfys:~$ sudo lvcreate -L 980M -n mint-vg-swap mint-vg
[sudo] password for lwk: Logical volume "mint-vg-swap" created.
lwk@qwfys:~$
lwk@qwfys:~$ sudo lsblk -l
[sudo] password for lwk:
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mint--vg-root 253:0 0 475.5G 0 lvm /
mint--vg-swap 253:1 0 980M 0 lvm
nvme0n1 259:0 0 477G 0 disk
nvme0n1p1 259:1 0 512M 0 part /boot/efi
nvme0n1p2 259:2 0 476.4G 0 part
lwk@qwfys:~$
lwk@qwfys:~$ sudo mkswap /dev/mint-vg/swap
Setting up swapspace version 1, size = 980 MiB (1027600384 bytes)
no label, UUID=aa89b812-bf49-4109-acd1-c66251d12f02
lwk@qwfys:~$