[LUG.ro] Consulta: Activar SWAP

[Daniel G. Samborski]

Hola, he visto, al parecer, que no tengo activada la SWAP.
Buscando en internet he visto como se activa, pero tengo una duda ya que me
aparece algo que en la guía no he visto.
Al hacer cat /etc/fstab me sale lo siguiente:
# /etc/fstab: static file system information.
#
# Use 'blkid' to print the universally unique identifier for a
# device; this may be used with UUID= as a more robust way to name devices
# that works even if disks are added and removed. See fstab(5).
#
# <file system> <mount point>   <type>  <options>       <dump>  <pass>
# / was on /dev/sdb5 during installation
UUID=e84df9a1-c328-427d-8ff9-96cbffd0e3de /               ext4
 errors=remount-ro 0       1
# /boot was on /dev/sdb2 during installation
UUID=3615ff98-b51a-4985-8a2d-a60f47c70975 /boot           ext4    defaults
       0       2
# /home was on /dev/sda1 during installation
UUID=79be84fc-7ecc-43ef-bb83-923ab4d45756 /home           ext4    defaults
       0       2
# /var was on /dev/sdb6 during installation
UUID=010745f7-b1d8-477b-81a7-4b95a95b1955 /var            ext4    defaults
       0       2
# swap was on /dev/sdb1 during installation
#UUID=7f2edcf9-cfad-4c1f-af85-944a9d20ade9 none            swap    sw
       0       0
*/dev/mapper/cryptswap1 none swap sw 0 0*

Al final me sale lo marcado en negrita.
Y en la guía que vi no aparece eso, solamente mostraba como activarla y
luego con swap on se activaba.
Mi duda es, elimino la almohadilla que hay delante de
#UUID=7f2edcf9-cfad-4c1f-af85-944a9d20ade9 none            swap    sw
       0       0
Para activarla o debo hacer algo con
*/dev/mapper/cryptswap1 none swap sw 0 0*

Ya que si hago sudo blkid me sale esto:
/dev/sda1: LABEL="/home" UUID="79be84fc-7ecc-43ef-bb83-923ab4d45756"
TYPE="ext4"
/dev/sdb2: LABEL="/boot" UUID="3615ff98-b51a-4985-8a2d-a60f47c70975"
TYPE="ext4"
/dev/sdb5: LABEL="/root" UUID="e84df9a1-c328-427d-8ff9-96cbffd0e3de"
TYPE="ext4"
/dev/sdb6: LABEL="/var" UUID="010745f7-b1d8-477b-81a7-4b95a95b1955"
TYPE="ext4"

Como se ve, la SWAP no aparece...

Un saludo.