GNU/Linux man pages
Livre :
Expressions régulières,
Syntaxe et mise en oeuvre :
Unix |
Unix v7 |
|
 |
uniq(1) |
 |
uniq − report repeated lines in a file
uniq [ −udc [ +n ] [ −n ] ] [ input [ output ] ]
Uniq reads the input file comparing adjacent lines. In the normal case, the second and succeeding copies of repeated lines are removed; the remainder is written on the output file. Note that repeated lines must be adjacent in order to be found; see sort(1). If the −u flag is used, just the lines that are not repeated in the original file are output. The −d option specifies that one copy of just the repeated lines is to be written. The normal mode output is the union of the −u and −d mode outputs.
The −c option supersedes −u and −d and generates an output report in default style but with each line preceded by a count of the number of times it occurred.
The n arguments specify skipping an initial portion of each line in the comparison:
|
−n |
The first n fields together with any blanks before each are ignored. A field is defined as a string of non-space, non-tab characters separated by tabs and spaces from its neighbors. | ||
|
+n |
The first n characters are ignored. Fields are skipped before characters. |
sort(1), comm(1)
|
uniq(1) | |