Markup for https://aebian.org/story/extend-swap-size-linux

output.zsh

Filesystem            Size  Used Avail Use% Mounted on
/dev/mapper/vg_redhat66tp-lv_root
                       18G  5.9G   11G  36% /
tmpfs                 3.9G  448K  3.9G   1% /dev/shm
/dev/sda1             477M   33M  419M   8% /boot
/dev/sdc              4.8G   10M  4.6G   1% /db
/dev/sdb               20G   44M   19G   1% /sw
/dev/sdd               20G   44M   19G   1% /data
/dev/sr0              2.8G  2.8G     0 100% /media/ORACLE_12.1_LinuxX64

output2.zsh

  --- Volume group ---
  VG Name               vg_redhat66tp
  System ID
  Format                lvm2
  Metadata Areas        1
  Metadata Sequence No  3
  VG Access             read/write
  VG Status             resizable
  MAX LV                0
  Cur LV                2
  Open LV               1
  Max PV                0
  Cur PV                1
  Act PV                1
  VG Size               19.51 GiB
  PE Size               4.00 MiB
  Total PE              4994
  Alloc PE / Size       4994 / 19.51 GiB
  Free  PE / Size       0 / 0
  VG UUID               31jXy7-hIo7-gyid-p9KE-tc0u-45Vr-uDodmR
  

output3.zsh

 WARNING: Reducing active and open logical volume to 15.51 GiB
  THIS MAY DESTROY YOUR DATA (filesystem etc.)
Do you really want to reduce lv_root? [y/n]: Y

output4.zsh

Size of logical volume vg_redhat66tp/lv_swap changed from 2.00 GiB (512 extents) to 4.00 GiB (1024 extents).
  Logical volume lv_swap successfully resized
  

output5.zsh

VFS: Disk quotas dquot_6.5.2
scsi 2:0:0:0: Direct-Access     VMware   Virtual disk     1.0  PQ: 0 ANSI: 2
scsi 2:0:1:0: Direct-Access     VMware   Virtual disk     1.0  PQ: 0 ANSI: 2
scsi 2:0:2:0: Direct-Access     VMware   Virtual disk     1.0  PQ: 0 ANSI: 2
scsi 2:0:3:0: Direct-Access     VMware   Virtual disk     1.0  PQ: 0 ANSI: 2
sd 2:0:0:0: [sda] Attached SCSI disk
sd 2:0:1:0: [sdb] Attached SCSI disk
sd 2:0:2:0: [sdc] Attached SCSI disk
sd 2:0:3:0: [sdd] Attached SCSI disk

output6.zsh

resize2fs 1.41.12 (17-May-2010)
Filesystem at /dev/sdb is mounted on /db; on-line resizing required
old desc_blocks = 2, new_desc_blocks = 3
Performing an on-line resize of /dev/sdb to 10485760 (4k) blocks.
The filesystem on /dev/sdb is now 10485760 blocks long.