Unix and Linux Discussions Tagged with i o |
|
Thread / Thread Starter |
Last Post |
Replies |
Views |
Forum |
|
|
|
17 |
17,540 |
UNIX for Beginners Questions & Answers |
|
|
|
0 |
10,168 |
Shell Programming and Scripting |
|
|
|
1 |
2,612 |
Shell Programming and Scripting |
|
|
|
7 |
14,670 |
Programming |
|
|
|
2 |
2,608 |
UNIX for Advanced & Expert Users |
|
|
|
3 |
2,499 |
UNIX for Dummies Questions & Answers |
|
|
|
3 |
2,783 |
UNIX for Dummies Questions & Answers |
|
|
|
6 |
3,790 |
UNIX for Dummies Questions & Answers |
|
|
|
4 |
3,484 |
UNIX for Dummies Questions & Answers |
|
|
|
1 |
3,681 |
UNIX for Dummies Questions & Answers |
|
|
|
2 |
3,150 |
Programming |
|
|
|
4 |
2,921 |
UNIX for Dummies Questions & Answers |
|
|
|
2 |
5,459 |
UNIX for Dummies Questions & Answers |
|
|
|
3 |
2,841 |
UNIX for Dummies Questions & Answers |
|
|
|
4 |
3,801 |
UNIX for Dummies Questions & Answers |
|
|
|
4 |
6,397 |
IP Networking |
|
|
|
2 |
3,538 |
UNIX for Dummies Questions & Answers |
|
|
|
2 |
2,306 |
UNIX for Dummies Questions & Answers |
|
|
|
5 |
5,021 |
UNIX for Dummies Questions & Answers |
|
|
|
1 |
2,769 |
UNIX for Dummies Questions & Answers |
|
|
|
2 |
4,674 |
UNIX for Dummies Questions & Answers |
|
|
|
3 |
4,508 |
UNIX for Dummies Questions & Answers |
UNIQ(1) General Commands Manual UNIQ(1)
NAME
uniq - report repeated lines in a file
SYNOPSIS
uniq [ -udc [ +n ] [ -n ] ] [ input [ output ] ]
DESCRIPTION
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 charac-
ters separated by tabs and spaces from its neighbors.
+n The first n characters are ignored. Fields are skipped before characters.
SEE ALSO
sort(1), comm(1)
7th Edition April 29, 1985 UNIQ(1)