Question

I’ve been parsing through some log files and I’ve found that some of the lines are too long to display on one line so Terminal.app kindly wraps them onto the next line. However, I’ve been looking for a way to truncate a line after a certain number of characters so that Terminal doesn’t wrap, making it much easier to spot patterns.

I wrote a small Perl script to do this:

#!/usr/bin/perl  die('need max length\n') unless $#ARGV == 0;  while (<STDIN>) {     $_ = substr($_, 0, $ARGV[0]);     chomp($_);     print '$_\n'; } 

But I have a feeling that this functionality is probably built into some other tools (sed?) That I just don’t know enough about to use for this task.

So my question sort of a reverse question: how do I truncate a line of stdin Without writing a program to do it?

Answer 1

Pipe output to:

cut -b 1-LIMIT 

Where LIMIT is the desired line width.