1SWAPON(8) Linux Programmer's Manual SWAPON(8)
2
3
4
6 swapon, swapoff - enable/disable devices and files for paging and swap‐
7 ping
8
10 /sbin/swapon [-h -V]
11 /sbin/swapon -a [-v] [-e]
12 /sbin/swapon [-v] [-p priority] specialfile ...
13 /sbin/swapon [-s]
14 /sbin/swapoff [-h -V]
15 /sbin/swapoff -a
16 /sbin/swapoff specialfile ...
17
19 Swapon is used to specify devices on which paging and swapping are to
20 take place.
21
22 The device or file used is given by the specialfile parameter. It may
23 be of the form -L label or -U uuid to indicate a device by label or
24 uuid.
25
26 Calls to swapon normally occur in the system multi-user initialization
27 file /etc/rc making all swap devices available, so that the paging and
28 swapping activity is interleaved across several devices and files.
29
30 Normally, the first form is used:
31
32 -a All devices marked as ``swap'' swap devices in /etc/fstab are
33 made available, except for those with the ``noauto'' option.
34 Devices that are already running as swap are silently skipped.
35
36 -e When -a is used with swapon, -e makes swapon silently skip
37 devices that do not exist.
38
39 -h Provide help
40
41 -L label
42 Use the partition that has the specified label. (For this,
43 access to /proc/partitions is needed.)
44
45 -p priority
46 Specify priority for swapon. This option is only available if
47 swapon was compiled under and is used under a 1.3.2 or later
48 kernel. priority is a value between 0 and 32767. Higher numbers
49 indicate higher priority. See swapon(2) for a full description
50 of swap priorities. Add pri=value to the option field of
51 /etc/fstab for use with swapon -a.
52
53 -s Display swap usage summary by device. Equivalent to "cat
54 /proc/swaps". Not available before Linux 2.1.25.
55
56 -U uuid
57 Use the partition that has the specified uuid. (For this,
58 access to /proc/partitions is needed.)
59
60 -v Be verbose.
61
62 -V Display version
63
64 Swapoff disables swapping on the specified devices and files. When the
65 -a flag is given, swapping is disabled on all known swap devices and
66 files (as found in /proc/swaps or /etc/fstab).
67
69 You should not use swapon on a file with holes. Swap over NFS may not
70 work.
71
73 swapon(2), swapoff(2), fstab(5), init(8), mkswap(8), rc(8), mount(8)
74
76 /dev/hd?? standard paging devices
77 /dev/sd?? standard (SCSI) paging devices
78 /etc/fstab ascii filesystem description table
79
81 The swapon command appeared in 4.0BSD.
82
83
84
85Linux 1.x 25 September 1995 SWAPON(8)