creatubg a swao-file: Once we have the file is created, do i need to set permission?

[dhubs]

good evening dear friends hello dear buddies at JustLinux,


well at the moment i want to create a swap-file for my linux notebook


i have learned that - before creating the file, i need to ensure that i have enough free disk space to complete the whole process successfully.
that said - i should get a kind of a detailed report on the system?s disk space usage with the df command:

df -h

Here, the root filesystem (/) has enough free space (53G) to create the file.

this way i get some insights into the data - consisting of the following categories:

Filesystem                         Size  Used Avail Use% Mounted on

the nextg step is to create a file that will be used as a swap:

sudo fallocate -l 8G /swap.img

hopefully the fallocate utility is present on the system,

sudo dd if=/dev/zero of=/swap.img bs=1024 count=8194404

Question: Once we have the file being created, do i need to set the file permissions to 600


is this necessary!?


Any and all help is greatly appreciated

greetings

[michaelk]

From what I have read you want to use dd solely and not fallocate. fallocate does not guarantee a contiguous file.

Yes you need to set permissions to 600.