What are the commonly accepted file name extension for squashfs?

[astrophys]

Hello,

I use mksquashfs on RHEL8.6 to archive large directories.

Question :

1. What are the commonly accepted squashfs extensions? E.g. somefile.squashfs?

[plougher]

I have never mandated a specific Squashfs image extension because some systems have 3 character limitations and others do not.

Personally I have always used .sqsh (see footnote), e.g. image.sqsh. I have also seen .sqfs, e.g. image.sqfs which I think is also a good extension. If limited to 3 characters I have seen .sfs. e.g. image.sfs.

Footnote: The Squashfs filesystem magic number is the ASCII characters SQSH in little endian format (i.e. stored as HSQS).

[aonez]

@plougher what will be a good UTI for this format? Maybe com.plougher.squashfs-archive?

For example ZIP has com.pkware.zip-archive and public.zip-archive.

[plougher]

@plougher what will be a good UTI for this format? Maybe com.plougher.squashfs-archive?

Looks a good suggestion to me.

For example ZIP has com.pkware.zip-archive and public.zip-archive.