how to calculate hash value in ubuntu || sha1 md5 sha256
A hash function is any function that can be used to map data of arbitrary size to data of fixed size. The values returned by a hash function are called hash values, hash codes, digests, or simply hashes. One use is a data structure called a hash table, widely used in computer software for rapid data lookup.
source:-https://en.wikipedia.org/wiki/Hash_fu...
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sha1sum {file}
sha256sum {file}
md5sum {file}
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