there are two files with very long name ...Also have a look at "var/tmp/pveupload-XXXXXXXXXXXXXXX" if there is anything left.
Screenshot / make a photo of what you are seeing / doing, cause both cd and rm are some of the most basic linux commands there are, so if they don't exist/work, there is either something very strange going on, or you're using them incorrectly.but it seams cd and rm commands are not available
rm /var/tmp/pveupload*
ls -lav /var/lib/vz/template/iso
cd /var/lib/vz/template/iso
ls -lav
rm <filename to delete>
rm -rf /var/tmp/pveupload*
Perfect. If your issue is resolved, please mark your thread as "solved". You can do this by editing your first post and setting the flag.thanks , removed the temp file and space has been restored