uniq
Report or omit repeated lines
Syntax
uniq [OPTION]... [INPUT [OUTPUT]]
Filter adjacent matching lines from INPUT (or standard input), writing to OUTPUT (or standard output).
With no FILE, or when FILE is -, read standard input.
Important options
| Option | Description |
|---|---|
-d, --repeated |
Only print duplicate lines, one for each group |
-i, --ignore-case |
Ignore differences in case when comparing |
-c, --count |
Prefix lines by the number of ocurrences |