Given
$ cat /etc/fstab
...
/dev/mapper/lubuntu--vg-swap none swap sw 0 0
why do we still need:
$ sudo swapoff /dev/mapper/lubuntu--vg-swap
$ sudo mkswap /dev/mapper/lubuntu--vg-swap
$ sudo swapon /dev/mapper/lubuntu--vg-swap
?
In other wors, why do we need both mkswap
and /etc/fstab
to set up swap? What do mkswap
and /etc/fstab
do differently?
My question comes from https://unix.stackexchange.com/a/502591/674
Thanks.