Scenario: Extend/Growing Logical Volume size for /opt on RHEL/CentOS.
System: CentOS/RHEL 6/7
Login as root then follow below steps:
1) Check free size in Volume Group (vgs). If still there free size then continue to step-2.
# vgs
[root@VTEST01 ~]# vgs
VG #PV #LV #SN Attr VSize VFree
VolGroup 2 7 0 wz--n- 59.50g 12.00g
[root@VIDHOLXDTESTAP01 ~]#