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Exclamation marks in echos (shell scripts)

veryangryman · 2014-07-28 13:17:48

Hi im trying to do the following temp=tempFile.$$ touch $tempFile echo "<!DOCTYPE ThisCode PUBLIC "-//company//DTD ThisCode" >> $temp But the echo gives this error bash: !DOCTYPE: event not found How do i make it do the echo literally?

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28-07-2014 2:17pm

#1

veryangryman

Registered Users Posts: 5,531 ✭✭✭

Join Date: November 2007

Posts: 4554

Hi im trying to do the following

temp=tempFile.$$
touch $tempFile
echo "<!DOCTYPE ThisCode PUBLIC "-//company//DTD ThisCode" >> $temp

But the echo gives this error

bash: !DOCTYPE: event not found

How do i make it do the echo literally?

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#2 28-07-2014 2:25pm
Skrynesaver

Registered Users Posts: 1,109 ✭✭✭

Join Date: January 2005

Posts: 1089
Either slash escape the exclamation mark
echo "<\!DOCTYPE.."
or single quote the text to prevent shell interpolation

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#3 29-07-2014 7:37am
daymobrew

Registered Users Posts: 6,490 ✭✭✭

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Posts: 5973

Skrynesaver wrote: »

or single quote the text to prevent shell interpolation

+1 on single quotes - shell doesn't mess with your text. And copy/pasting from other sources doesn't need escaping.

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