With bash, how to get 1 Line from xxhsum --version ?
Ubuntu 20.04.4 LTS (Focal Fossa)
Why unexpected bash results with
pipe | head and
pipe | awk ?
Examples below work as expected:
md5sum --version
md5sum (GNU coreutils) 8.30
Copyright (C) 2018 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later https://gnu.org/licenses/gpl.html.
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
Written by Ulrich Drepper, Scott Miller, and David Madore.
md5sum --version | head -n1
md5sum (GNU coreutils) 8.30
md5sum --version | head -n 1
md5sum (GNU coreutils) 8.30
md5sum --version | awk 'NR==1'
md5sum (GNU coreutils) 8.30
But there is a faster hasher
xxhsum
i am testing it, also called
xxhash
xxhsum --version
xxhsum 0.8.1 by Yann Collet
compiled as 64-bit x86_64 autoVec little endian with GCC 9.3.0
All the above is as expected.
But unexpected results with:
xxhsum --version | head -n1
xxhsum 0.8.1 by Yann Collet
compiled as 64-bit x86_64 autoVec little endian with GCC 9.3.0
xxhsum --version | head -n 1
xxhsum 0.8.1 by Yann Collet
compiled as 64-bit x86_64 autoVec little endian with GCC 9.3.0
xxhsum --version | awk 'NR==1'
xxhsum 0.8.1 by Yann Collet
compiled as 64-bit x86_64 autoVec little endian with GCC 9.3.0
unexpected results because
2 Lines are printed to screen, not 1 Line.
Regarding xxhsum ...
How come 2 Lines are printed to screen?
How to get 1 Line printed from
xxhsum --version ?
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