and(USP)

Name

and : Outputs the field values that all files share in common in

      the first field.

Synopsis

Usage   : and <files>...

          and +f <file>

Version : Tue Jan  9 09:02:34 JST 2024

Edition : 1

Description

Outputs to stdout the values that the all specified files have

in common in the first field.

All specified files must be sorted on the first field.

File names are read from <file> when +f option is specifed. if "-" is

specified as <file> or omitted <file>, stdin is read instead.

Example

$ cat data1

3 Mid_Atlantic

4 Midwest

6 Central

7 Gulf_Coast

9 Hawaii

$ cat data2

1 Alaska

2 Northeast

4 Midwest

5 Southeast

7 Gulf_Coast

9 Hawaii

$ cat data3

4 NewYork

7 Georgia

$ cat filenames

data1

data2 data3

$ and data1 data2 data3

4

7

$ and +f filenames

4

7