Red Hat GLOBAL FILE SYSTEM 5.0, Руководство администратора

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• You can append a field to the output with the plus sign (+), which is used in combination with
the -o argument.
The following example displays the UUID of the physical volume in addition to the default
fields.
# pvs -o +pv_uuid
PV VG Fmt Attr PSize PFree PV UUID
/dev/sdb1 new_vg lvm2 a- 17.14G 17.14G
onFF2w-1fLC-ughJ-D9eB-M7iv-6XqA-dqGeXY
/dev/sdc1 new_vg lvm2 a- 17.14G 17.09G
Joqlch-yWSj-kuEn-IdwM-01S9-XO8M-mcpsVe
/dev/sdd1 new_vg lvm2 a- 17.14G 17.14G
yvfvZK-Cf31-j75k-dECm-0RZ3-0dGW-tUqkCS
• Adding the
-v
argument to a command includes some extra fields. For example, the
pvs -v
command will display the
DevSize
and
PV UUID
fields in addition to the default fields.
# pvs -v
Scanning for physical volume names
PV VG Fmt Attr PSize PFree DevSize PV UUID
/dev/sdb1 new_vg lvm2 a- 17.14G 17.14G 17.14G
onFF2w-1fLC-ughJ-D9eB-M7iv-6XqA-dqGeXY
/dev/sdc1 new_vg lvm2 a- 17.14G 17.09G 17.14G
Joqlch-yWSj-kuEn-IdwM-01S9-XO8M-mcpsVe
/dev/sdd1 new_vg lvm2 a- 17.14G 17.14G 17.14G
yvfvZK-Cf31-j75k-dECm-0RZ3-0dGW-tUqkCS
• The
--noheadings
argument suppresses the headings line. This can be useful for writing
scripts.
The following example uses the
--noheadings
argument in combination with the
pv_name
argument, which will generate a list of all physical volumes.
# pvs --noheadings -o pv_name
/dev/sdb1
/dev/sdc1
/dev/sdd1
• The
--separator separator
argument uses
separator
to separate each field. This can be
useful in a script if you are running a
grep
command on the output.
The following example separates the default output fields of the
pvs
command with an equals
sign (=).
# pvs --separator =
Chapter 4. LVM Administration with CLI Commands
48