Linux experts, will linux generate some junk files.

Linux experts, will linux generate some junk files. -- Linux general technology-Linux technology and application information. For details, refer to the following section. To answer this question, I am afraid to draw a conclusion. for example, if a directory like tmp is in linux, I am using a KDE for windows(you can download a collection entity of kde.gz with excellent software, and I am opening a file named .tar.gz, later I found that the available space on the system disk was reduced for no reason. Later I used the "disk fragment program" to find that ark generated a "temporary file" on the system disk ", it took a lot of space, so I deleted it. Is there a similar situation in linux, or some programs will generate some "junk files, which files are, just delete them? If not, why?