Operation: /tmp and /var
Once in operation, the /tmp directory is used to store temporary files from editors, formatters, compilers, and assemblers, as needed. /var is a directory that holds various short-term data, such as usage accounting, security logs, incoming electronic mail, crash dumps, printer spooling, and runtime program databases. Frequently, these two directories are separately mounted filesystems, especially on systems where these kinds of files take up much space.
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