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Accepted
jnbdz
Asked: 2017-08-10 12:44:03 +0800 CST

I loose the swap every time I restart my Ubuntu server

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Here is how I set the swap:

sudo /bin/dd if=/dev/zero of=/var/swap.1 bs=1MB count="1000"
sudo /sbin/mkswap /var/swap.1
sudo /sbin/swapon /var/swap.1

Every time I reboot/restart the swap is gone.

The command free gives me zeros for swap. But the file /var/swap.1 is still there.

swap.1 file details:

-rw-r--r-- 1 root root 989000000 Aug 9 20:55 swap.1

The number 989000000 seems a bit big...

How can I make it persistent?

lsb_release -a

LSB Version:    core-9.20160110ubuntu5-amd64:core-9.20160110ubuntu5-noarch:security-9.20160110ubuntu5-amd64:security-9.20160110ubuntu5-noarch
Distributor ID: Ubuntu
Description:    Ubuntu 17.04
Release:    17.04
Codename:   zesty
ubuntu

1 Answers

  1. Best Answer

    In order for the system to automatically use the swap file as swap space on boot, it needs an entry in /etc/fstab similar to:

    /var/swap.1 swap swap defaults 0 0
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