How to add 100MB of swap space as a logical volume in CentOS?

Question

I need to add 100MB of swap space to my machine. I was trying to use a logical volume.

# lvcreate –name lv_swap2 –size 100M vg
# mkswap /dev/vg/lv_swap2
# swapon /dev/vg/lv_swap2
# vi /etc/fstab
/dev/vg/lv_swap2 swap defaults 0 0

It doesn't work.

score 1 · Accepted Answer · edited May 31 '15 at 11:15

1

You wrote everything right but missed something here: swap swap defaults

# lvcreate –name lv_swap2 –size 100M vg
# mkswap /dev/vg/lv_swap2
# swapon /dev/vg/lv_swap2
# vi /etc/fstab
/dev/vg/lv_swap2 swap swap defaults 0 0

Now it should work.

edited May 31 '15 at 11:15

Chris Davies

answered May 31 '15 at 02:49

Invoker

@genghis, i would recommend editing fstab, then use swapon -a. Finally, check if swap is active (http://unix.stackexchange.com/q/23072/16640), so everything is fine on reboot. – Franklin Piat May 31 '15 at 11:21

1 Answers1