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Escaping Special characters


 
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# 8  
Old 10-26-2009
Code:
echo " '$x' "
'  '

# 9  
Old 10-26-2009
The single quote behaved like a normal character inside double quote..Smilie
# 10  
Old 10-26-2009
Yes.

The quote in the site you reference is clearly misleading.

Quote:
double-quotes
Used to partially remove the special significance os certain characters. Characters such as the $, single-quotes(') and back-ticks (``) retain their special significance.
# 11  
Old 10-26-2009
We don't know what Operating System or Shell you have so this solution may not work.

Code:
Maybe you mean:

echo "*/7 * * * * \"/root/${Service_Name}.sh 2>&1 >dev/null\""

Which produces the line:

*/7 * * * * "/root/Linux CPU (EDF).sh 2>&1 >dev/null"

However. You will be well advised to avoid brackets and spaces in the filenames of shell scripts because they will drive you nuts!


I have omitted the append because the root crontab is more usually:
/var/spool/cron/crontabs/root

As hinted at earlier it is much safer to copy the crontab twice (once with a date extension and again under its correct name) to a work directory before editing the copy of "root" and then with the work directory as the current working directory publishing the edited version with "crontab root". Never issue "crontab root" unless you are in the directory containing your new crontab or the command will wipe your root crontab.

Last edited by methyl; 10-26-2009 at 09:59 PM.. Reason: Qualify CWD when issuing "crontab root".
# 12  
Old 10-27-2009
I am using centos 5.3 and the root crontab is /var/spool/cron/root.

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