Added lvextend sheet.

sheets/lvextend

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+# lvextend
+
+# Extends a logical volume in an existing volume group.
+# A volume group is a collection of logical and physical volumes.
+
+# Extend volume in volume mylv in groug vg0 (defined by volume path /dev/vg0/mylv) to 12 gigabyte:
+lvextend -L 12G /dev/vg0/mylv
+
+# Extend volume in volume mylv in groug vg0 (defined by volume path /dev/vg0/mylv) by 1 gigabyte:
+lvcreate -L +1G /dev/vg0/mylv
+
+# Extend volume in volume mylv in groug vg0 (defined by volume path /dev/vg0/mylv) to use all of the unallocated space in the volume group vg0:
+lvcreate -L +100%FREE /dev/vg0/mylv
+
+# Extend ext4 filesystem after changing a logical volume (takes volume path as parameter):
+ext2resize /dev/vg0/mylv
+
+# Extend btrfs filesystem after changing a logical volume (takes the mount point as parameter, not the volume path):
+btrfs filesystem resize max /mylv
+
+# Extend xfs filesystem after changing a logical volume (takes the mount point as parameter, not the volume path):
+xfs_growfs /mylv
+
+# Extend jfs filesystem after changing a logical volume (takes the mount point as parameter, not the volume path);
+# Just remount:
+mount -o remount,resize /home