<div>
if perl -e 'exit ( (shift) &lt;&nbsp;(shift)); ' &nbsp;$temphigh $templow ; then &nbsp;echo low ; fi<br />

</div>


if perl -e 'exit ( (shift) < (shift)); '  $temphigh $templow ; then  echo low ; fi


<div>
I'm pretty new to this - I don't quite understand that script<br />
<br />

</div>


I'm pretty new to this - I don't quite understand that script



<div>
Thanks for your code: I used the awk one but how come the logic is backwards. &nbsp;Because logically if actualtemp is &lt;&nbsp;templow shouldn't it echo low not high? &nbsp;It works if I do it backwards. &nbsp;But just wondering why it is like this.<br />
<br />

</div>


Thanks for your code: I used the awk one but how come the logic is backwards.  Because logically if actualtemp is < templow shouldn't it echo low not high?  It works if I do it backwards.  But just wondering why it is like this.



<div>
Because of the convention that a 0 exit value is used for a success, and a non-zero exit value is used to indicate a failure.
</div>


Because of the convention that a 0 exit value is used for a success, and a non-zero exit value is used to indicate a failure.

<div>
<div class="content wysiwyg-content">
Here's where I'm stuck<br />
<br />
temphigh=$(cat $d/temphigh | sed 's/ //g');<br />
templow=$(cat $d/templow | sed 's/ //g');<br />
actualtemp=$(cat $d/temperature | sed 's/ //g');<br />
<br />
I have the sed part in there because the file has leading spaces:<br />
<br />
temphigh=80.124<br />
templow=20.212<br />
actualtemp=55.129<br />
<br />
What I can't get is I need to compare the actualtemp to temphigh and templow<br />
<br />
But how do I compare these values - when -lt and -gt needs integer??<br />
<br />
<br />
<br />
<br />
<br />

</div>
</div>


Here's where I'm stuck

temphigh=$(cat $d/temphigh | sed 's/ //g');
templow=$(cat $d/templow | sed 's/ //g');
actualtemp=$(cat $d/temperature | sed 's/ //g');

I have the sed part in there because the file has leading spaces:

temphigh=80.124
templow=20.212
actualtemp=55.129

What I can't get is I need to compare the actualtemp to temphigh and templow

But how do I compare these values - when -lt and -gt needs integer??







HELP!! Having trouble with bash script - need quick response

Kernel programming for Linux operating systems can be done with many different languages; C, C++, Python, Perl and Java, which are some of the most common languages used.There are also many different varieties of Linux, such as Ubuntu, Fedora and OpenSUSE.