How to add SWAP to Debian

[robclark]

I used these instructions https://wiki.friendlyelec.com/wiki/inde ... OS_to_eMMC

to install rk3528-XYZ-debian-bookworm-core-6.1-arm64-YYYYMMDD.img to my Zero2

All good.

Except .... I need to add a SWAP partition . but can't

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pi@NanoPi-Zero2:/$ df -Th   
Filesystem     Type      Size  Used Avail Use% Mounted on
udev           devtmpfs  970M     0  970M   0% /dev
tmpfs          tmpfs     197M  1.2M  196M   1% /run
overlay        overlay    27G  5.7G   20G  23% /
tmpfs          tmpfs     985M  200K  985M   1% /dev/shm
tmpfs          tmpfs     5.0M     0  5.0M   0% /run/lock
tmpfs          tmpfs     197M   56K  197M   1% /run/user/1001
tmpfs          tmpfs     197M     0  197M   0% /run/user/0

fails at this step

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pi@NanoPi-Zero2:/$ sudo swapon /swapfile
swapon: /swapfile: swapon failed: Invalid argument

I am assuming (??) this

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overlay        overlay    27G  5.7G   20G  23% /

is not SWAP compatible

Any ideas?

[RafaG]

Hi!

You can follow docker instruction to make the root file system not use overlayfs:

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sudo passwd root  # Create a password for the root user if it hasn't been done before.
su - root -c 'echo "overlayfs=disable" > /.init_wipedata'
sudo reboot

And next, make the swap:

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dd if=/dev/zero of=/swapfile bs=1M count=1024
chmod 600 /swapfile
mkswap /swapfile
swapon /swapfile
echo "/swapfile none swap sw 0 0" >> /etc/fstab

br,