определить тип файла (determine file type)
Безопасность (Security)
On systems where libseccomp (https://github.com/seccomp/libseccomp )
is available, file is enforces limiting system calls to only the
ones necessary for the operation of the program. This enforcement
does not provide any security benefit when file is asked to
decompress input files running external programs with the -z
option. To enable execution of external decompressors, one needs
to disable sandboxing using the -S option.
