uniq Linux Commands
What is Linux uniq Command?
Explanation
uniq COMMAND:uniq cmd is used to remove the duplicate records in directories by comparing the directories. This command can also be used to get the unique words or characters in a sorted file.SYNTAX :
uniq [OPTION]... [INPUT [OUTPUT]]OPTIONS:
-c, --count
prefix lines by the number of occurrences.
-d, --repeated
only print duplicate lines.
-D
delimit-method={none(default),prepend,separate} Delimiting is done with blank lines.
-f, --skip-fields=N
avoid comparing the first N fields
-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
--version
output version information and exit
EXAMPLE:
-
uniq test.txt
Output:
a
b
c
f
d
In the above example, uniq command displays the unique characters in the file test.txt.
-
uniq -c test.txt
Output:
1 a
1 b
1 c
1 f
1 d
In the above example, uniq command displays lines with the number of occurrences in the file test.txt.
uniq [OPTION]... [INPUT [OUTPUT]]
OPTIONS:
-c, --count
prefix lines by the number of occurrences.
-d, --repeated
only print duplicate lines.
-D
delimit-method={none(default),prepend,separate} Delimiting is done with blank lines.
-f, --skip-fields=N
avoid comparing the first N fields
-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
--version
output version information and exit
EXAMPLE:
-
uniq test.txt
Output:
a
b
c
f
d
In the above example, uniq command displays the unique characters in the file test.txt.
-
uniq -c test.txt
Output:
1 a
1 b
1 c
1 f
1 d
In the above example, uniq command displays lines with the number of occurrences in the file test.txt.
| -c, --count | prefix lines by the number of occurrences. |
| -d, --repeated | only print duplicate lines. |
| -D | delimit-method={none(default),prepend,separate} Delimiting is done with blank lines. |
| -f, --skip-fields=N | avoid comparing the first N fields |
| -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 |
| --version | output version information and exit |
-
uniq test.txtOutput:a b c f d
In the above example, uniq command displays the unique characters in the file test.txt. -
uniq -c test.txtOutput:1 a 1 b 1 c 1 f 1 d
In the above example, uniq command displays lines with the number of occurrences in the file test.txt.
