uniq - phpMan

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UNIQ(1)                                   User Commands                                   UNIQ(1)

NAME
       uniq - report or omit repeated lines

SYNOPSIS
       uniq [OPTION]... [INPUT [OUTPUT]]

DESCRIPTION
       Filter adjacent matching lines from INPUT (or standard input), writing to OUTPUT (or stan-
       dard output).

       With no options, matching lines are merged to the first occurrence.

       Mandatory arguments to long options are mandatory for short options too.

       -c, --count
              prefix lines by the number of occurrences

       -d, --repeated
              only print duplicate lines, one for each group

       -D     print all duplicate lines

       --all-repeated[=METHOD]
              like  -D,  but  allow  separating  groups  with  an  empty  line;  METHOD={none(de-
              fault),prepend,separate}

       -f, --skip-fields=N
              avoid comparing the first N fields

       --group[=METHOD]
              show  all  items,  separating  groups  with  an  empty  line;  METHOD={separate(de-
              fault),prepend,append,both}

       -i, --ignore-case
              ignore differences in case when comparing

       -s, --skip-chars=N
              avoid comparing the first N characters

       -u, --unique
              only print unique lines

       -z, --zero-terminated
              line delimiter is NUL, not newline

       -w, --check-chars=N
              compare no more than N characters in lines

       --help display this help and exit

       --version
              output version information and exit

       A field is a run of blanks  (usually  spaces  and/or  TABs),  then  non-blank  characters.
       Fields are skipped before chars.

       Note:  'uniq'  does  not  detect repeated lines unless they are adjacent.  You may want to
       sort the input first, or use 'sort -u' without 'uniq'.  Also, comparisons honor the  rules
       specified by 'LC_COLLATE'.

AUTHOR
       Written by Richard M. Stallman and David MacKenzie.

REPORTING BUGS
       GNU coreutils online help: <https://www.gnu.org/software/coreutils/>
       Report uniq translation bugs to <https://translationproject.org/team/>

COPYRIGHT
       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.

SEE ALSO
       comm(1), join(1), sort(1)

       Full documentation at: <https://www.gnu.org/software/coreutils/uniq>
       or available locally via: info '(coreutils) uniq invocation'

GNU coreutils 8.30                        September 2019                                  UNIQ(1)

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