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GNU coreutils includes the command join that does exactly what you want if the line sorting in the result is irrelevant:

join <(sort file1) <(sort file2)

A 1 9
B 3 3
C 1 2

If you want the tabs back, do:

join <(sort file1) <(sort file2) | tr ' ' '\t'

A   1   9
B   3   3
C   1   2

Or use the t option to join.

(<() aka process substitution, requires ksh93 (where the feature originated in), bash or zsh)

GNU coreutils includes the command join that does exactly what you want if line sorting in the result is irrelevant:

join <(sort file1) <(sort file2)

A 1 9
B 3 3
C 1 2

If you want the tabs back, do:

join <(sort file1) <(sort file2) | tr ' ' '\t'

A   1   9
B   3   3
C   1   2

Or use the t option to join.

(<() aka process substitution, requires ksh93 (where the feature originated in), bash or zsh)

GNU coreutils includes the command join that does exactly what you want if the line sorting in the result is irrelevant:

join <(sort file1) <(sort file2)

A 1 9
B 3 3
C 1 2

If you want the tabs back, do:

join <(sort file1) <(sort file2) | tr ' ' '\t'

A   1   9
B   3   3
C   1   2

(<() requires Bash. It may work in other Bourne-based shells.)

GNU coreutils includes the command join that does exactly what you want if the line sorting in the result is irrelevant:

join <(sort file1) <(sort file2)

A 1 9
B 3 3
C 1 2

If you want the tabs back, do:

join <(sort file1) <(sort file2) | tr ' ' '\t'

A   1   9
B   3   3
C   1   2

Or use the t option to join.

(<() aka process substitution, requires ksh93 (where the feature originated in), bash or zsh)

GNU coreutils includes the command join that does exactly what you want if the line sorting in the result is irrelevant:

join <(sort file1) <(sort file2)

A 1 9
B 3 3
C 1 2

If you want the tabs back, do:

join <(sort file1) <(sort file2) | tr ' ' '\t'

A   1   9
B   3   3
C   1   2

GNU coreutils includes the command join that does exactly what you want if the line sorting in the result is irrelevant:

join <(sort file1) <(sort file2)

A 1 9
B 3 3
C 1 2

If you want the tabs back, do:

join <(sort file1) <(sort file2) | tr ' ' '\t'

A   1   9
B   3   3
C   1   2

(<() requires Bash. It may work in other Bourne-based shells.)