Mobile disk space in linux

To move a disk space in linux to/home: 1. view disk space [root @ computehome] # df-hFilesystemSizeUsedAvailUse % Mountedon/dev/mapper/vg_compute-lv_root... to move a disk space in linux to/home: 1. view disk space [root @ compute home] # df-hFilesystem Size Used Avail Use % Mounted on/dev/mapper/vg_compute-lv_root 531G 48G 478G 10%/tmpfs 16G 88 K 16G 1%/dev/shm/dev/mapper/ddf3164c5349202020202010000055000000004711471100001450p1 485 M 38 M 422 M 9%/boot 2. uninstall/homeumount/home/3. view logical volume group information [root @ compute home] # vgs VG # PV # LV # SN Attr VSize VFree vg_compute 1 3 0 wz -- n-556.44g 712.00 m 4. check whether the disk is normal e2fsck-f/dev/vg_compute/lv_home 5. shrink/home disk size resize2fs/dev/vg_compute/lv_home 1024 Mlvreduce-L 1024 M/dev/vg_compute/lv_home 6. extended/disk size lvextend-L + 489 GB/dev/vg_compute/lv_root resize2fs/dev/vg_compute/lv_root 7. mount/homemount/home 8. restore the user folder in/home 1. create a user folder and modify the permission mkdir/home/shomechown shome: shome/home/shome 2. copy all the files (hidden files) in the/etc/skel directory to your default directory to solve the problem. cp/etc/skel /. bash */home/shome/create a user in Centos, but I do not know why it is not generated in the user's default directory folder ". bash_profile ". when switching to a new user, the following problems will occur, and no shell name solution will appear: all the files in the/etc/skel Directory (hidden files) copy to the user's default directory to solve the problem. because the Volume of Openstack requires an independent Volume shard, I directly created a Volume as the vg during partitioning. Note that the vg name must be "nova-vloumes". you can use vgdisplay to view the appendix: 1 pvs. use lvs vgs -- 1.1 to display the physical volume (pv) information [root @ redhat6 lvm] # pvs pv vg Fmt Attr PSize PFree/dev/sda2 vg_redhat6 lvm2 a -- 14.51g 0/dev/sdb vg_redhat6 lvm2 a -- 4.00g 2.81g -- 1.2 display logical volume Group (vg) information [root @ redhat6 lvm] # vgs VG # PV # LV # SN Attr VSize VFree vg_redhat6 2 3 0 wz -- n-18.50g 2.81g -- 1.3 display logical volume (lv) information [root @ redhat6 lvm] # lvs lv vg Attr LSize Origin Snap % Move Log Copy % Convert lv_pgdata_01 vg_redhat6-wi-ao 700.00 m lv_root vg_redhat6-wi-ao 13.10g lv_swap vg_redhat6-wi-ao 1.91g remarks: previous pvs, lvs, the vgs command displays the image information of LVM by default. II. formatting control -- 2.1 display additional information [root @ redhat6 lvm] # pvs-v Scanning for physical volume names pv vg Fmt Attr PSize PFree DevSize pv uuid/dev/sda2 vg_redhat6 lvm2 -- 14.51g 0 14.51g dpTW84-DHRy-PIA9-u1tY-YUH4-XQKw-8Hy2Zm/dev/sdb vg_redhat6 lvm2 a -- 4.00g 2.81g 4.00g YKIQwX-zc6H-TZ65-P3qr-sRfk-LX0p-T18vdG [root @ redhat6 lvm] # vgs-v Finding all volume groups Finding volume group "vg_redhat6 "VG Attr Ext # PV # LV # SN VSize VFree vg uuid vg_redhat6 wz -- n-4.00 m 2 3 0 18.50g 2.81g E6cA2U-TL1x-ScCV-UnGU-3Kq4-1u6V-WUb5L4 remarks: adding the-v parameter will show additional information about the LVM image, for example, the UUID field. -- 2.2 pvs default output [root @ redhat6 lvm] # pvs pv vg Fmt Attr PSize PFree/dev/sda2 vg_redhat6 lvm2 a -- 14.51g 0/dev/sdb vg_redhat6 lvm2 a -- 4.00g 2.81g -- 2.3 only displays pv_name, dev_size field [root @ redhat6 lvm] # pvs-o pv_name, dev_size PV DevSize/dev/sda2 14.51g/dev/sdb 4.00g remarks: add the-o parameter, specify the fields to be output. -- 2.4 on pvs default output, add Field [root @ redhat6 lvm] # pvs pv vg Fmt Attr PSize PFree/dev/sda2 vg_redhat6 lvm2 a -- 14.51g 0/dev/sdb vg_redhat6 lvm2 a -- 4.00g 2.81g [root @ redhat6 lvm] # pvs-o + pv_uuid pv vg Fmt Attr PSize PFree pv uuid/dev/sda2 vg_redhat6 lvm2 a -- 14.51g 0 dpTW84-DHRy-PIA9-u1tY-YUH4-XQKw-8Hy2Zm/dev/sdb vg_redhat6 lvm2 a -- 4.00g 2.81g YKIQwX-zc6H-TZ65-P3qr-sRfk-LX0p-T18vdG remarks: if you want to add a word to the default output -O + field name. -- 2.5 vgs Display Volume member [root @ redhat6 lvm] # vgs VG # PV # LV # SN Attr VSize VFree vg_redhat6 2 3 0 wz -- n-18.50g 2.81g [root @ redhat6 lvm] # vgs-o + lv_name VG # PV # LV # SN Attr VSize VFree LV vg_redhat6 2 3 0 wz -- n-18.50g 2.81g lv_root vg_redhat6 2 3 0 wz -- n- 18.50g 2.81g lv_swap vg_redhat6 2 3 0 wz -- n-18.50g 2.81g lv_pgdata_01 three-field sorting -- 3.1 sort by lv_size field [root @ redhat6 lvm] # lvs lv vg Attr LSize Origin sn Ap % Move Log Copy % Convert lv_pgdata_01 vg_redhat6-wi-ao 700.00 m lv_root vg_redhat6-wi-ao 13.10g lv_swap Wi-Fi-wi-ao 1.91g [root @ redhat6 lvm] # lvs- O lv_size lv vg Attr LSize Origin Snap % Move Log Copy % Convert lv_pgdata_01 vg_redhat6-wi-ao 700.00 m lv_swap vg_redhat6-wi-ao 1.91g lv_root vg_redhat6-wi-ao 13.10g remarks: if you want to sort by output fields, you can use the-O field name option. The lvs, vgs, and pvs fields -- 4.1 lvs field ------------------- lv_all-All fields in this section. lv_uuid-Unique identifier. lv_name-Name. LVs created for internal use are enclosed in brackets. lv_path-Full pathname for LV. lv_attr-Various attributes-see man page. lv_major-Persistent major number or-1 if not persistent. lv_minor-Persistent minor number or-1 if not persistent. lv_read_ahead-Read ahead setting in current units. lv_kernel_major-Currently assigned major number or-1 if LV is not active. lv_kernel_minor-Currently assigned minor number or-1 if LV is not active. lv_kernel_read_ahead-Currently-in-use read ahead setting in current units. lv_size-Size of LV in current units. seg_count-Number of segments in LV. origin-For snapshots, the origin device of this LV. origin_size-For snapshots, the size of the origin device of this LV. snap_percent-For snapshots, the percentage full if LV is active. copy_percent-For mirrors and pvmove, current percentage in-sync. move_pv-For pvmove, Source PV of temporary LV created by pvmove. convert_lv-For lvconvert, Name of temporary LV created by lvconvert. lv_tags-Tags, if any. performance_log-For mirrors, the LV holding the synchronisation log. modules-Kernel device-mapper modules required for this LV. -- 4.2 pvs field pv_all-All fields in this section. pe_start-Offset to the start of data on the underlying device. pv_size-Size of PV in current units. pv_free-Total amount of unallocated space in current units. pv_used-Total amount of allocated space in current units. pv_attr-Various attributes-see man page. pv_pe_count-Total number of Physical Extents. pv_pe_alloc_count-Total number of allocated Physical Extents. pv_tags-Tags, if any. pv_mda_count-Number of metadata areas on this device. pv_mda_used_count-Number of metadata areas in use on this device. -- 4.3 vgs field vg_all-All fields in this section. vg_fmt-Type of metadata. vg_uuid-Unique identifier. vg_name-Name. vg_attr-Various attributes-see man page. vg_size-Total size of VG in current units. vg_free-Total amount of free space in current units. vg_sysid-System ID indicating when and where it was created. vg_extent_size-Size of Physical Extents in current units. vg_extent_count-Total number of Physical Extents. vg_free_count-Total number of unallocated Physical Extents. max_lv-Maximum number of LVs allowed in VG or 0 if unlimited. max_pv-Maximum number of PVs allowed in VG or 0 if unlimited. pv_count-Number of PVs. lv_count-Number of LVs. snap_count-Number of snapshots. vg_seqno-Revision number of internal metadata. incremented whenever it changes. vg_tags-Tags, if any. vg_mda_count-Number of metadata areas on this VG. vg_mda_used_count-Number of metadata areas in use on this VG. vg_mda_free-Free metadata area space for this VG in current units. vg_mda_size-Size of smallest metadata area for this VG in current units. vg_mda_copies-Target number of in use metadata areas in the VG.