I would put forward though that leaving out the default action {print $0} is no more a short-cut than leaving out the default condition 1, and also print prints the default value, which is $0 (and the semicolons are unnecessary). So in full it would be..
Which can of course be combined into 1 block, since the condition is the same (like agama did in post #2)..
I sometimes have a preference for one-liners because I think they are sometimes easier to read (but only if they are short, true one-liners (fewer than 65 characters), and they are great for cutting and pasting or just composing on the command line..
Last edited by Scrutinizer; 07-28-2012 at 06:17 PM..
Hi all
I have tried to search for this, but keep getting a MySQL db connect error, so am posing the question here, and taking a risk of incurring the wrath of the mods with my first post...
I have the following test script:
#!/bin/bash
HTTPD=`/bin/ps -axcu | /usr/bin/grep httpd... (6 Replies)
Hi Guys,
could someone tell me what this ksh construct does
typeset -r PROG_PWD=${0%/*} does
I understand the -r for readonly but I would very much appreciate a definitive account of what this will set $PROG_PWD to.
If I run this at the cmd line it it gets set to /usr/bin but I would... (2 Replies)
I was checking my error logs today and ran into some errors I have not seen before maybe somebody has run into these before?
/etc/cron.quarter-hourly/owusers.sh:
Set effective gid to mail(12) failed!
/usr/local/mailwatch/check_sendmail_relay.sh: line 8:
thanks (1 Reply)
Hi all,
Sorry to ask this easy question but I am stuck. In a scenario i am executing one shell script which contains a if - else construct :
if ; then
echo $line
$line >> successful_build.txt
else
$line >> failed_services.txt
fi
explaination : if the... (5 Replies)
I recently was handed responsibility for a script which has array references that are new to me and I could use some help understanding them.
Parts of the config file and script are included. This script collects backups from a jail server of the jails running on that host. Several jail... (1 Reply)
Hi all
i have been trying to do a small 'question and answer' script using if-else statement and a combination of pipe. I have succeeded in allowing the user to login with user name and password stored in a sequence username/password in a file named "pass" like this:
echo "please enter your... (14 Replies)
Hi,
I need to construct the below path from the two available directory path,
O/P
/home/data/test/run/ht/WEB/HTML
/home/data/test/run/ht/WEB/JSP
/home/data/test/run/ht/WEB/CSS
Path:1
------
/home/data/test/run/
Path:2
------
/home/data/share/app/01/lang/ht/WEB/HTML... (5 Replies)
Hi all,
I thought this would be simple, but I've been having a lot of trouble trying to write this IF statement, if I may ask for help pls:
In BASH, how would I construct the if statement:
Should ONLY be true if USEROPTscript=="yes"]] AND $mode=="INSTALL" /or/ $mode=="CHANGE" ]]... (3 Replies)
Discussion started by: jmccoughlin
3 Replies
LEARN ABOUT REDHAT
cut
CUT(1) FSF CUT(1)NAME
cut - remove sections from each line of files
SYNOPSIS
cut [OPTION]... [FILE]...
DESCRIPTION
Print selected parts of lines from each FILE to standard output.
Mandatory arguments to long options are mandatory for short options too.
-b, --bytes=LIST
output only these bytes
-c, --characters=LIST
output only these characters
-d, --delimiter=DELIM
use DELIM instead of TAB for field delimiter
-f, --fields=LIST
output only these fields; also print any line that contains no delimiter character, unless the -s option is specified
-n with -b: don't split multibyte characters
-s, --only-delimited
do not print lines not containing delimiters
--output-delimiter=STRING
use STRING as the output delimiter the default is to use the input delimiter
--help display this help and exit
--version
output version information and exit
Use one, and only one of -b, -c or -f. Each LIST is made up of one range, or many ranges separated by commas. Each range is one of:
N N'th byte, character or field, counted from 1
N- from N'th byte, character or field, to end of line
N-M from N'th to M'th (included) byte, character or field
-M from first to M'th (included) byte, character or field
With no FILE, or when FILE is -, read standard input.
AUTHOR
Written by David Ihnat, David MacKenzie, and Jim Meyering.
REPORTING BUGS
Report bugs to <bug-coreutils@gnu.org>.
COPYRIGHT
Copyright (C) 2002 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICU-
LAR PURPOSE.
SEE ALSO
The full documentation for cut is maintained as a Texinfo manual. If the info and cut programs are properly installed at your site, the
command
info cut
should give you access to the complete manual.
cut (coreutils) 4.5.3 February 2003 CUT(1)