Hello Fellow Linux admins!I am hoping someone can help me with a question regarding managing free or unallocated space in an LVM setup on centos7. Please assume I do not have access to a GUI. I am looking strictly for CLI guidance to solve this please.Essentially what i need to do is make /var bigger, to accommodate some additional VM's that i am creating. I would need to claim some of that free space  <<  this is where I need the helpcreate the physical volume using pvcreateextend the volume group using vgextendextend the logical volume using lvextendthen grow the filesystem using xfs_growI have a 1TB disk in my server. Of that 1TB disk, there is 721GB of unallocated space (see image attached)These are the filesystems on the server:Filesystem                            Size  Used Avail Use% Mounted on/dev/mapper/scientific_physical-root   71G   17G   54G  25% /devtmpfs                              9.7G     0  9.7G   0% /devtmpfs                                 9.8G  576K  9.8G   1% /dev/shmtmpfs                                 9.8G  9.4M  9.8G   1% /runtmpfs                                 9.8G     0  9.8G   0% /sys/fs/cgroup/dev/mapper/scientific_physical-home  121G   12G  110G  10% /home/dev/mapper/scientific_physical-var    63G   51G   13G  80% /var/dev/sda1                             497M  215M  282M  44% /boottmpfs                                 2.0G   20K  2.0G   1% /run/user/1000tmpfs                                 2.0G   24K  2.0G   1% /run/user/0These are the LV's on the system:  LV   VG                  Attr       LSize   Pool Origin Data%  Meta%  Move Log Cpy%Sync Convert  home scientific_physical -wi-ao---- 120.66g                                                      root scientific_physical -wi-ao----  70.30g                                                      swap scientific_physical -wi-ao----   2.93g                                                      var  scientific_physical -wi-ao----  63.00g These are the physical volumes:  PV         VG                  Fmt  Attr PSize   PFree  /dev/sda2  scientific_physical lvm2 a--  213.41g    0   /dev/sda3  scientific_physical lvm2 a--   46.56g 3.09gThis is my volume group:  VG                  #PV #LV #SN Attr   VSize   VFree  scientific_physical   2   4   0 wz--n- 259.98g 3.09g[root@physical ~]# fdisk -l /dev/sda Disk /dev/sda: 1000.2 GB, 1000204886016 bytes, 1953525168 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0x0004cb56Device Boot      Start         End      Blocks   Id  System/dev/sda1   *        2048     1026047      512000   83  Linux/dev/sda2         1026048   448595967   223784960   8e  Linux LVM/dev/sda3       448598016   546254265    48828125   83  LinuxEdit #1:here is the output from fdisk /dev/sda. I don't have a complete understanding of the Start /End /Blocks, but being that as it is, I still don't see the free space that should be available[root@physical ~]# fdisk /dev/sda Welcome to fdisk (util-linux 2.23.2).Changes will remain in memory only, until you decide to write them.Be careful before using the write command.Command (m for help): pDisk /dev/sda: 1000.2 GB, 1000204886016 bytes, 1953525168 sectorsUnits = sectors of 1 * 512 = 512 bytesSector size (logical/physical): 512 bytes / 512 bytesI/O size (minimum/optimal): 512 bytes / 512 bytesDisk label type: dosDisk identifier: 0x0004cb56   Device Boot      Start         End      Blocks   Id  System/dev/sda1   *        2048     1026047      512000   83  Linux/dev/sda2         1026048   448595967   223784960   8e  Linux LVM/dev/sda3       448598016   546254265    48828125   83  LinuxEdit #2OK so now I can see the space is there in parted! Wonderful and thank you!!Now my question is, what would I have to do to actually grab some of this space to use it? I am assuming whatever I grab, in my exact scenario would now be called /dev/sda4. Would you be able to guide me on claiming 100GB from this free space?Thanks so much! [root@physical ~]# parted /dev/sda(parted) print free                                                       Model: ATA ST31000340NS (scsi)Disk /dev/sda: 1000GBSector size (logical/physical): 512B/512BPartition Table: msdosDisk Flags: Number  Start   End     Size    Type     File system  Flags        32.3kB  1049kB  1016kB           Free Space 1      1049kB  525MB   524MB   primary  xfs          boot 2      525MB   230GB   229GB   primary               lvm        230GB   230GB   1049kB           Free Space 3      230GB   280GB   50.0GB  primary        280GB   1000GB  721GB            Free Space
Centos 7 Managing free space from CLI
centos;lvm