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hpr0768 :: Sort

Ken describes the use of the GNU 'sort' command

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Hosted by Ken Fallon on 2011-07-12 is flagged as Explicit and is released under a CC-BY-SA license.
GNU sort. (Be the first).
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Duration: 00:14:30


Examples on Wikipedia

From and on your computer man sort

       sort - sort lines of text files
       sort [OPTION]... [FILE]...
       sort [OPTION]... --files0-from=F
       Write sorted concatenation of all FILE(s) to standard output.
       Mandatory  arguments  to  long  options are mandatory for short options
       too.  Ordering options:
       -b, --ignore-leading-blanks
	      ignore leading blanks
       -d, --dictionary-order
	      consider only blanks and alphanumeric characters
       -f, --ignore-case
	      fold lower case to upper case characters
       -g, --general-numeric-sort
	      compare according to general numerical value
       -i, --ignore-nonprinting
	      consider only printable characters
       -M, --month-sort
	      compare (unknown) < `JAN' < ... < `DEC'
       -n, --numeric-sort
	      compare according to string numerical value
       -R, --random-sort
	      sort by random hash of keys
	      get random bytes from FILE
       -r, --reverse
	      reverse the result of comparisons
	      sort according to WORD: general-numeric -g,  month  -M,  numeric
	      -n, random -R, version -V
       -V, --version-sort
	      natural sort of (version) numbers within text
       Other options:
	      merge at most NMERGE inputs at once; for more use temp files
       -c, --check, --check=diagnose-first
	      check for sorted input; do not sort
       -C, --check=quiet, --check=silent
	      like -c, but do not report first bad line
	      compress temporaries with PROG; decompress them with PROG -d
	      read  input  from the files specified by NUL-terminated names in
	      file F; If F is - then read names from standard input
       -k, --key=POS1[,POS2]
	      start a key at POS1 (origin 1), end it at POS2 (default  end  of
       -m, --merge
	      merge already sorted files; do not sort
       -o, --output=FILE
	      write result to FILE instead of standard output
       -s, --stable
	      stabilize sort by disabling last-resort comparison
       -S, --buffer-size=SIZE
	      use SIZE for main memory buffer
       -t, --field-separator=SEP
	      use SEP instead of non-blank to blank transition
       -T, --temporary-directory=DIR
	      use  DIR	for temporaries, not $TMPDIR or /tmp; multiple options
	      specify multiple directories
       -u, --unique
	      with -c, check for strict ordering; without -c, output only  the
	      first of an equal run
       -z, --zero-terminated
	      end lines with 0 byte, not newline
       --help display this help and exit
	      output version information and exit
       POS  is	F[.C][OPTS],  where  F is the field number and C the character
       position in the field; both are origin 1.  If neither -t nor -b	is  in
       effect,	characters  in	a  field are counted from the beginning of the
       preceding whitespace.  OPTS  is	one  or  more  single-letter  ordering
       options,  which	override  global ordering options for that key.  If no
       key is given, use the entire line as the key.
       SIZE may be followed by the following multiplicative suffixes: % 1%  of
       memory, b 1, K 1024 (default), and so on for M, G, T, P, E, Z, Y.
       With no FILE, or when FILE is -, read standard input.
       ***  WARNING  ***  The locale specified by the environment affects sort
       order.  Set LC_ALL=C to get the traditional sort order that uses native
       byte values.
       Written by Mike Haertel and Paul Eggert.
       Report sort bugs to
       GNU coreutils home page:
       General help using GNU software:
       Copyright  (C)  2009  Free Software Foundation, Inc.  License GPLv3+: GNU
       GPL version 3 or later .
       This is free software: you are free  to	change	and  redistribute  it.
       There is NO WARRANTY, to the extent permitted by law.
       The  full documentation for sort is maintained as a Texinfo manual.  If
       the info and sort programs are properly installed  at  your  site,  the
	      info coreutils 'sort invocation'
       should give you access to the complete manual.
GNU coreutils 7.4		 October 2009			       

The command that promped me to record this episode

cat camera-x.txt | sed 's[Camera Model Name               : [[g'| \
awk -F ';' '{print $2" "$1}' | \
sort -i -b -k1,1 -u | \
grep -v "^ "


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