On Wed, 23 Mar 2022 at 08:41, <bradbell@seanet.com> wrote:
I am trying to create a swapfile on my fedora 35 system and do not know what I am doing wrong:
trash>uname -a
Linux fedora 5.16.15-201.fc35.x86_64 #1 SMP PREEMPT Thu Mar 17 05:45:13 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

Why do you need to create a swapfile?  Such details are normally handled by the installer in a way that works for
the majority of users.   Is your F35 a fresh install or upgrade?
 
If I follow the swapfile instructions on
https://docs.fedoraproject.org/en-US/Fedora/14/html/Storage_Administration_Guide/s2-swap-creating-file.html

It is unwise to apply Fedora 14 documentation on Fedora 35 -- a lot has changed.  Are you using the default brtfs
filesystem?   On my F35 system with btrfs (and 16GB RAM):

 % swapon -s
Filename                                Type            Size            Used            Priority
/dev/zram0                              partition       8388604         30208           100
 


I get the following result:

step 1:
trash>sudo dd if=/dev/zero of=/swapfile bs=1024 count=65536
65536+0 records in
65536+0 records out
67108864 bytes (67 MB, 64 MiB) copied, 0.147119 s, 456 MB/s

step 2:
trash>sudo mkswap /swapfile
mkswap: /swapfile: insecure permissions 0644, fix with: chmod 0600 /swapfile
Setting up swapspace version 1, size = 64 MiB (67104768 bytes)
no label, UUID=f1402a6a-c64c-4f84-9d47-4f8822d2f1d2

step 3:
sudo  chmod 0600 /swapfile

step 4:
trash>sudo swapon /swapfile
swapon: /swapfile: swapon failed: Invalid argument


--
George N. White III