NAME
colrm —
remove columns from a file
SYNOPSIS
colrm |
[start [stop]] |
DESCRIPTION
The colrm 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.
If only the start column is specified, columns numbered less than the start column will be written. If both start and stop columns are specified, columns numbered less than the start column or greater than the stop column will be written. Column numbering starts with one, not zero.
Tab characters increment the column count to the next multiple of eight. Backspace characters decrement the column count by one.
ENVIRONMENT
The LANG, LC_ALL
and LC_CTYPE environment variables affect the
execution of colrm as described in
environ(7).
EXIT STATUS
The colrm utility exits 0 on
success, and >0 if an error occurs.
EXAMPLES
Show columns below 3 (c) and above 5 (e):
$ echo -e "abcdefgh\n12345678" | colrm 3 5 abfgh 12678
Specifying a start column bigger than the number of columns in the file is allowed and shows all the columns:
$ echo "abcdefgh" | colrm 100 abcdefgh
Using 1 as start column will show nothing:
$ echo "abcdefgh" | colrm 1
SEE ALSO
HISTORY
The colrm utility first appeared in
1BSD.
AUTHORS
Jeff Schriebman wrote the original version
of colrm in November 1974.