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About rm
rm, short for remove, is a shell command for removing files from the file system. The command may not actually delete a file since it only unlinks it – removes a hard link to a file via the unlink system call. If a file has multiple links and less than all are removed, then the file remains in the file system; accessible via its other links. When a file's only link is removed, then the file is deleted – releasing its storage space for other use.
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