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* [[:#swapon| swapon]]<br />
<br />
== swapon ==<br />
<br />
<syntaxhighlight lang="bash"><br />
<br />
[root@Pridd ~]# swapon --help<br />
<br />
Usage:<br />
swapon [options] [<spec>]<br />
<br />
Options:<br />
-a, --all enable all swaps from /etc/fstab<br />
-d, --discard[=<policy>] enable swap discards, if supported by device<br />
-e, --ifexists silently skip devices that do not exist<br />
-f, --fixpgsz reinitialize the swap space if necessary<br />
-p, --priority <prio> specify the priority of the swap device<br />
-s, --summary display summary about used swap devices<br />
--show[=<columns>] display summary in definable table<br />
--noheadings don't print headings, use with --show<br />
--raw use the raw output format, use with --show<br />
--bytes display swap size in bytes in --show output<br />
-v, --verbose verbose mode<br />
<br />
-h, --help display this help and exit<br />
-V, --version output version information and exit<br />
<br />
The <spec> parameter:<br />
-L <label> synonym for LABEL=<label><br />
-U <uuid> synonym for UUID=<uuid><br />
LABEL=<label> specifies device by swap area label<br />
UUID=<uuid> specifies device by swap area UUID<br />
PARTLABEL=<label> specifies device by partition label<br />
PARTUUID=<uuid> specifies device by partition UUID<br />
<device> name of device to be used<br />
<br />
<br />
Available discard policy types (for --discard):<br />
once : only single-time area discards are issued. (swapon)<br />
pages : discard freed pages before they are reused.<br />
* if no policy is selected both discard types are enabled. (default)<br />
<br />
Available columns (for --show):<br />
NAME device file or partition path<br />
TYPE type of the device<br />
SIZE size of the swap area<br />
USED bytes in use<br />
PRIO swap priority<br />
<br />
For more details see swapon(8).<br />
<br />
[root@Pridd ~]# swapon --version<br />
swapon from util-linux 2.24<br />
<br />
[root@Pridd ~]# swapon -v /mnt/swapfile<br />
swapon /mnt/swapfile<br />
swapon: /mnt/swapfile: found swap signature: version 1, page-size 4, same byte order<br />
swapon: /mnt/swapfile: pagesize=4096, swapsize=2147483648, devsize=2147483648<br />
<br />
[root@Pridd ~]# swapon -v /mnt/MiSwapfile<br />
swapon /mnt/MiSwapfile<br />
swapon: /mnt/MiSwapfile: found swap signature: version 1, page-size 4, same byte order<br />
swapon: /mnt/MiSwapfile: pagesize=4096, swapsize=512000000, devsize=512000000<br />
<br />
[root@Pridd ~]# swapon -s<br />
Filename Type Size Used Priority<br />
/dev/sda2 partition 4087700 0 -1<br />
/mnt/swapfile file 2097148 0 -2<br />
/mnt/MiSwapfile file 499996 0 -3<br />
<br />
[root@Pridd ~]# cat /proc/swaps <br />
Filename Type Size Used Priority<br />
/dev/sda2 partition 4087700 0 -1<br />
/mnt/swapfile file 2097148 0 -2<br />
/mnt/MiSwapfile file 499996 0 -3<br />
<br />
[root@Pridd ~]# swapon --show<br />
NAME TYPE SIZE USED PRIO<br />
/dev/sda2 partition 3.9G 0B -1<br />
/mnt/swapfile file 2G 0B -2<br />
/mnt/MiSwapfile file 488.3M 0B -3<br />
<br />
Si tiene más de un archivo de swap o partición de swap debería<br /> considerar la asignación de un valor de prioridad (0 a 32767) para<br /><br />
cada área de swap. El sistema usará áreas de swap de la prioridad más alta antes de usar áreas de swap de la prioridad inferior. Por ejemplo, si tiene un disco más rápido (/dev/sda) y un disco más lento (/dev/sdb), asigna una prioridad más alta con el área de swap localizada en el dispositivo más rápido. Las prioridades se pueden asignar en fstab vía el parámetro -p o --priority<br />
<br />
[root@Pridd ~]# swapoff -a<br />
[root@Pridd ~]# swapon --show /mnt/MiSwapfile<br />
<br />
[root@Pridd ~]# swapon -vp 100 /dev/sda2<br />
swapon /dev/sda2<br />
swapon: /dev/sda2: found swap signature: version 1, page-size 4, same byte order<br />
swapon: /dev/sda2: pagesize=4096, swapsize=4185808896, devsize=4185811456<br />
<br />
[root@Pridd ~]# swapon --show<br />
NAME TYPE SIZE USED PRIO<br />
/dev/sda2 partition 3.9G 0B 100<br />
<br />
[root@Pridd ~]# swapon -vp 50 /mnt/MiSwapfile<br />
swapon /mnt/MiSwapfile<br />
swapon: /mnt/MiSwapfile: found swap signature: version 1, page-size 4, same byte order<br />
swapon: /mnt/MiSwapfile: pagesize=4096, swapsize=512000000, devsize=512000000<br />
<br />
[root@Pridd ~]# swapon --show<br />
NAME TYPE SIZE USED PRIO<br />
/dev/sda2 partition 3.9G 0B 100<br />
/mnt/MiSwapfile file 488.3M 0B 50<br />
<br />
[root@Pridd ~]# swapon -vp 500 /mnt/swapfile<br />
swapon /mnt/swapfile<br />
swapon: /mnt/swapfile: found swap signature: version 1, page-size 4, same byte order<br />
swapon: /mnt/swapfile: pagesize=4096, swapsize=2147483648, devsize=2147483648<br />
<br />
[root@Pridd ~]# swapon --show <br />
NAME TYPE SIZE USED PRIO<br />
/dev/sda2 partition 3.9G 0B 100<br />
/mnt/MiSwapfile file 488.3M 0B 50<br />
/mnt/swapfile file 2G 0B 500<br />
<br />
<br />
</syntaxhighlight><br />
<br />
[[Category:Comandos de la terminal]]</div>Rrc