That is a dangerous use of backticks and useless use of cat and discovered for yourself one of the reasons why You are correct, it splits on whitespace, not lines. (You can change this by altering the special IFS variable, but read is preferred over backticks for this anyway.)
If you want to read lines, you can do this.
Code:
while read LINE
do
echo "got line $LINE"
done < inputfile
This is also more efficient than cat in backticks.
It can even split tokens for you:
Code:
while read USERNAME EMAIL1 EMAIL2
do
echo "user $USERNAME"
echo "Email1 $EMAIL1"
echo "Email2 $EMAIL2"
done < inputfile
read also obeys IFS, so if your file was separated by commas instead of spaces, the loop would still work with a tiny change:
Code:
while IFS="," read USERNAME EMAIL1 EMAIL2
do
echo "user $USERNAME"
echo "Email1 $EMAIL1"
echo "Email2 $EMAIL2"
done < inputfile
Hi,
I would like to output the identical line to 2 text files, ie
output='blah'
echo $output > test1.txt
echo $output > test2.txt
Is there a way I could do that output with ONE command, ie
output='blah'
echo $output > test1.txt & test2.txt (I know that doesn't work)
Thanks for any... (1 Reply)
Hi all,
Here is my requirement
I have to search 'ORA' word in out.log file,if it is present then i need to send that file (out.log) content to some mail id.If 'ORA' word is not in that file then i need to send 'load succesful' message to some mail id.
The below the shell script is not... (5 Replies)
ok..
so problem is:
I have a file that reads:
cat 123
1 and 2
3 and 4
5 and 6
I was using for loops to run through this information.
Code:
for i in `cat 123`
do
echo $i
done
shouldn't the output come as
1 and 2 (3 Replies)
Hello,
I am trying to send text to a USB to serial adaptor and then to an external speech synthesizer. I tried using the cat and echo commands with no luck. I have gotten some audio output from my synthesizer using Kermit a terminal emulator, so I am pretty sure my synthesizer and my USB to serial... (1 Reply)
echo `echo ` doesn't echoes anything. And it's logic. But
echo `echo `echo ` ` does echoes "echo". What's the logic of it? the `echo `echo ` inside of the whole (first) echo, echoes nothing, so the first echo have to echo nothing but echoes "echo"
(too much echoing :P):o (2 Replies)
Hello, I have a simple(I think) question!
Although simple, I have been unable to resolve it, so I hope someone can help! OK, here it is:
1)I have an awk script that prints something, such as:
awk '{print $2}' a > x
so x might hold the value of say '10'
2)Now, I just want to check to see if... (4 Replies)
Hey all! I'm in an intro to UNIX class at university, and we've just began writing scripts. Naturally I can't get it to do what I want.
Basic script as follows:
COMPARE1=`ls|wc -l`
tar czf archive.tgz ~/path/to/file
COMPARE2=`tar tvzf archive.tgz|wc -l`
if
then
... (7 Replies)
Hi
I want to use echo command as below
echo 'dir=' $1 ' dir|file|home'
i need output like below :
echo 'dir=' $1 ' dir|file|home' pp13dff
Output
dir=pp13dff dir|file|home (4 Replies)
Cheers!
In /etc/syslog.conf, if an error type is not specified, is it logged anywhere (most preferable is it logged to /var/log/messages) or not?
To be more precise I am interested in error and critical level messages. At default these errors are not specified in syslog.conf, and I need to... (6 Replies)
Hi,
I need to send an email in the below format:
Hi All,
body description on 12-Dec-2014
<a html table, which is there in Result.txt file>
I am using the below command
{
echo "Hi All,"
echo "body description on $var_date "
} | ( cat Result.txt ) | /usr/sbin/sendmail -oi -t
... (1 Reply)
Discussion started by: Prasannag87
1 Replies
LEARN ABOUT SUSE
echo
ECHO(1) User Commands ECHO(1)NAME
echo - display a line of text
SYNOPSIS
echo [SHORT-OPTION]... [STRING]...
echo LONG-OPTION
DESCRIPTION
Echo the STRING(s) to standard output.
-n do not output the trailing newline
-e enable interpretation of backslash escapes
-E disable interpretation of backslash escapes (default)
--help display this help and exit
--version
output version information and exit
If -e is in effect, the following sequences are recognized:
NNN the character whose ASCII code is NNN (octal)
\ backslash
a alert (BEL)
backspace
c produce no further output
f form feed
new line
carriage return
horizontal tab
v vertical tab
NOTE: your shell may have its own version of echo, which usually supersedes the version described here. Please refer to your shell's docu-
mentation for details about the options it supports.
AUTHOR
Written by Brian Fox and Chet Ramey.
REPORTING BUGS
Report echo bugs to bug-coreutils@gnu.org
GNU coreutils home page: <http://www.gnu.org/software/coreutils/>
General help using GNU software: <http://www.gnu.org/gethelp/>
COPYRIGHT
Copyright (C) 2009 Free Software Foundation, Inc. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>.
This is free software: you are free to change and redistribute it. There is NO WARRANTY, to the extent permitted by law.
SEE ALSO
The full documentation for echo is maintained as a Texinfo manual. If the info and echo programs are properly installed at your site, the
command
info coreutils 'echo invocation'
should give you access to the complete manual.
GNU coreutils 7.1 July 2010 ECHO(1)
09-20-2012
You are correct, it splits on whitespace, not lines. (You can change this by altering the special IFS variable, but read is preferred over backticks for this anyway.)