(textutils.info)uniq invocation

comm invocation

sort invocation

Operating on sorted files

`uniq': Uniqify files
=====================

   `uniq' writes the unique lines in the given `input', or standard
input if nothing is given or for an INPUT name of `-'.  Synopsis:

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

   By default, `uniq' prints the unique lines in a sorted file, i.e.,
discards all but one of identical successive lines.  Optionally, it can
instead show only lines that appear exactly once, or lines that appear
more than once.

   The input must be sorted.  If your input is not sorted, perhaps you
want to use `sort -u'.

   If no OUTPUT file is specified, `uniq' writes to standard output.

   The program accepts the following options.  Also see Note: Common
options.

`-N'
`-f N'
`--skip-fields=N'
     Skip N fields on each line before checking for uniqueness.  Fields
     are sequences of non-space non-tab characters that are separated
     from each other by at least one spaces or tabs.

`+N'
`-s N'
`--skip-chars=N'
     Skip N characters before checking for uniqueness.  If you use both
     the field and character skipping options, fields are skipped over
     first.

`-c'
`--count'
     Print the number of times each line occurred along with the line.

`-i'
`--ignore-case'
     Ignore differences in case when comparing lines.

`-d'
`--repeated'
     Print only duplicate lines.

`-u'
`--unique'
     Print only unique lines.

`-w N'
`--check-chars=N'
     Compare N characters on each line (after skipping any specified
     fields and characters).  By default the entire rest of the lines
     are compared.

Dirfile and infopages generated Sat Dec 3 02:07:54 2005