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Jonas Grønbek
Asked: 2020-12-02 09:57:10 +0800 CST

disabled swap mem, how to enable again?

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I ran sudo sed -i '/ swap / s/^\(.*\)$/#\1/g' /etc/fstab sudo swapoff -a

which resulted in no swap memory being used, down from 2 gigabytes. (I have 24 gigabytes of ram).

/etc/fstab

#
# 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/sda2 during installation
UUID=0446af6d-0bd1-4811-91e7-7663019eecad /               ext4    errors=remount-ro 0       1
# /boot/efi was on /dev/sda1 during installation
UUID=343C-7C17  /boot/efi       vfat    umask=0077      0       1
# /swapfile                                 none            swap    sw              0       0
grub2 boot fstab partitioning

1 Answers

  1. comment in the out-commented swap-related line in /etc/fstab:

    sed -i '/ swap / s/^#\(.*\)$/\1/g' /etc/fstab

    then enable swap again:

    swapon -a -v

    Option -v tell you more about, whether or not the operation was succesfully

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