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.Dd June 23, 2020 .Dt COLRM 1 .Os .Sh NAME .Nm colrm .Nd remove columns from a file .Sh SYNOPSIS .Nm .Op Ar start Op Ar stop .Sh DESCRIPTION The .Nm utility removes selected columns from the lines of a file. A column is defined as a single character in a line. Input is read from the standard input. Output is written to the standard output.
p If only the .Ar start column is specified, columns numbered less than the .Ar start column will be written. If both .Ar start and .Ar stop columns are specified, columns numbered less than the .Ar start column or greater than the .Ar stop column will be written. Column numbering starts with one, not zero.
p Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one. .Sh ENVIRONMENT The .Ev LANG , LC_ALL and .Ev LC_CTYPE environment variables affect the execution of .Nm as described in .Xr environ 7 . .Sh EXIT STATUS .Ex -std .Sh EXAMPLES Show columns below 3 (c) and above 5 (e): d -literal -offset indent $ echo -e "abcdefgh\en12345678" | colrm 3 5 abfgh 12678 .Ed
p Specifying a start column bigger than the number of columns in the file is allowed and shows all the columns: d -literal -offset indent $ echo "abcdefgh" | colrm 100 abcdefgh .Ed
p Using 1 as start column will show nothing: d -literal -offset indent $ echo "abcdefgh" | colrm 1 .Ed .Sh SEE ALSO .Xr awk 1 , .Xr column 1 , .Xr cut 1 , .Xr paste 1 .Sh HISTORY The .Nm utility first appeared in x 1 . .Sh AUTHORS .An Jeff Schriebman wrote the original version of .Nm in November 1974.