Info Catalog coreutils: paste invocation coreutils: Operating on fields

coreutils: join invocation

 
 8.3 ‘join’: Join lines on a common field
 ========================================
 
 ‘join’ writes to standard output a line for each pair of input lines
 that have identical join fields.  Synopsis:
 
      join [OPTION]... FILE1 FILE2
 
    Either FILE1 or FILE2 (but not both) can be ‘-’, meaning standard
 input.  FILE1 and FILE2 should be sorted on the join fields.
 
      $ cat file1
      a 1
      b 2
      e 5
 
      $ cat file2
      a X
      e Y
      f Z
 
      $ join file1 file2
      a 1 X
      e 5 Y
 
 ‘join’’s default behavior (when no options are given):
    • the join field is the first field in each line;
    • fields in the input are separated by one or more blanks, with
      leading blanks on the line ignored;
    • fields in the output are separated by a space;
    • each output line consists of the join field, the remaining fields
      from FILE1, then the remaining fields from FILE2.
 

Menu

 
· General options in join      Options which affect general program behavior.
· Sorting files for join       Using ‘sort’ before ‘join’.
· Working with fields          Joining on different fields.
· Paired and unpaired lines    Controlling ‘join’’s field matching.
· Header lines                 Working with header lines in files.
· Set operations               Union, Intersection and Difference of files.
 

Info Catalog coreutils: paste invocation coreutils: Operating on fields