Provided by: xxhash_0.6.5-3_amd64
xxhsum - print or check xxHash non-cryptographic checksums
xxhsum [<OPTION>] ... [<FILE>] ... xxhsum -b [<OPTION>] ... xxh32sum is equivalent to xxhsum -H0 xxh64sum is equivalent to xxhsum -H1
Print or check xxHash (32 or 64bit) checksums. When FILE is -, read standard input. xxhsum supports a command line syntax similar but not identical to md5sum(1). Differences are: xxhsum doesn´t have text/binary mode switch (-b, -t); xxhsum always treats file as binary file; xxhsum has hash bit width switch (-H); As xxHash is a fast non-cryptographic checksum algorithm, xxhsum should not be used for security related purposes. xxhsum -b invokes benchmark mode. See OPTIONS and EXAMPLES for details.
-V, --version Display xxhsum version -HHASHTYPE Hash selection. HASHTYPE means 0=32bits, 1=64bits. Default value is 1 (64bits) --little-endian Set output hexadecimal checksum value as little endian convention. By default, value is displayed as big endian. -h, --help Display help and exit The following four options are useful only when verifying checksums (-c) -c, --check Read xxHash sums from the FILEs and check them --quiet Exit non-zero for improperly formatted checksum lines --strict Don´t print OK for each successfully verified file --status Don´t output anything, status code shows success -w, --warn Warn about improperly formatted checksum lines The following options are useful only benchmark purpose -b Benchmark mode. See EXAMPLES for details. -BBLOCKSIZE Only useful for benchmark mode (-b). See EXAMPLES for details. BLOCKSIZE specifies benchmark mode´s test data block size in bytes. Default value is 102400 -iITERATIONS Only useful for benchmark mode (-b). See EXAMPLES for details. ITERATIONS specifies number of iterations in benchmark. Single iteration takes at least 2500 milliseconds. Default value is 3
xxhsum exit 0 on success, 1 if at least one file couldn´t be read or doesn´t have the same checksum as the -c option.
Output xxHash (64bit) checksum values of specific files to standard output $ xxhsum -H1 foo bar baz Output xxHash (32bit and 64bit) checksum values of specific files to standard output, and redirect it to xyz.xxh32 and qux.xxh64 $ xxhsum -H0 foo bar baz > xyz.xxh32 $ xxhsum -H1 foo bar baz > qux.xxh64 Read xxHash sums from specific files and check them $ xxhsum -c xyz.xxh32 qux.xxh64 Benchmark xxHash algorithm for 16384 bytes data in 10 times. xxhsum benchmarks xxHash algorithm for 32-bit and 64-bit and output results to standard output. First column means algorithm, second column is source data size in bytes, last column means hash generation speed in mega-bytes per seconds. $ xxhsum -b -i10 -B16384
Report bugs at: https://github.com/Cyan4973/xxHash/issues/