Is a command available to free space of deleted file

[Bret Busby]

Hello.

I am using UbuntuMATE 20.10 .

Is a command available, to free the space clogged up by a deleted file?

.xsession-errorts decided to eat my home partition free space, and
grew to 32GB, so, I deleted it in the PCManFM file manager, using
<SHIFT><DEL> .

But, it clearly did not delete the file, as, while the file
"officially" no longer exists, the partition is still full, with no
free space, and, I need to free the space that the file still
occupies, even after being deleted.

Thank you in anticipation.

-- 
Bret Busby
Armadale
West Australia
(UTC+0800)
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