08-21-2011
Quote:
Originally Posted by
arindamlive
...
If i use the cut command, i wud have to know beforehand the range of columns which is not possible as the line numbers maybe 1 digit, 2 digit, 3 digit or even more perhaps...
...
Nope, not necessarily; you do not
have to know the range of columns beforehand.
You could cut the pattern based on a delimiter and then pick up the first column.
For example, if the pattern is "abc~def", and you set the delimiter to "~", then your 1st column would be "abc", whose length could be arbitrary.
Check the man page of your system for the syntax.
tyler_durden
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COLRM(1) BSD General Commands Manual COLRM(1)
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 spec-
ified, 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.
SEE ALSO
awk(1), column(1), cut(1), paste(1)
HISTORY
The colrm command appeared in 3.0BSD.
BSD
August 4, 2004 BSD