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Full Discussion: sort file adding extra character
Top Forums Shell Programming and Scripting sort file adding extra character Post 302454860 by alister on Monday 20th of September 2010 06:27:47 AM
Old 09-20-2010
sort probably added a missing newline at the end.

Code:
$ printf 'z\na' > unsorted
$ sort unsorted > sorted
$ ls -l unsorted sorted | awk '{print $5, $9}'
4 sorted
3 unsorted
$ od -c unsorted 
0000000    z  \n   a                                                    
0000003
$ od -c sorted   
0000000    a  \n   z  \n                                                
0000004

Also, sort is a text utility. Don't be surprised if you observe odd behavior with arbitrary binary data.

Regards,
Alister
Last edited by alister; 09-20-2010 at 07:33 AM..
This User Gave Thanks to alister For This Post:
naamas03
 

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LEARN ABOUT DEBIAN

ib_read_bw

ib_read_bw(1)							   User Commands						     ib_read_bw(1)

NAME

       ib_read_bw - RDMA read bandwidth test

SYNOPSIS

       ib_read_bw [ options ] [ server IP address ]

DESCRIPTION

       This program tests the bandwidth of RMDA read transactions.

OPTIONS

       -p, --port=<port>
	      listen on/connect to port <port> (default: 18515)

       -m, --mtu=<mtu>
	      mtu size (default: 1024)

       -d, --ib-dev=<dev>
	      use IB device <dev> (default: first device found)

       -i, --ib-port=<port>
	      use port <port> of IB device (default: 1)

       -s, --size=<size>
	      size of message to exchange (default: 1)

       -a, --all
	      run sizes from 2 till 2^23

       -t, --tx-depth=<dep>
	      size of tx queue (default: 50)

       -n, --iters=<iters>
	      number of exchanges (at least 100, default: 1000)

       -C, --report-cycles
	      report times in cpu cycle units (default: microseconds)

       -H, --report-histogram
	      print out all results (default: print summary only)

       -U, --report-unsorted
	      (implies -H) print out unsorted results (default: sorted)

       -V, --version
	      display version number

AUTHOR

       Guy Coates  < gmpc@sanger.ac.uk >

perftest							 February 20, 2008						     ib_read_bw(1)
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