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09-10-2009
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How to correctly use an echo inside an echo?
Bit of a weird one i suppose, i want to use an echo inside an echo... For example...
i have a script that i want to use to take users input and create another script. Inside this script it creates it also needs to use echos... echo "echo "hello"" >$file echo "echo "goodbye"" >$file Why is this not correct? Thanks. |
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09-10-2009
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it should be echo "echo \" somthing\" " > $file
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09-10-2009
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echo "echo "hello"" >$file If you want only hello should be written to $file, then The command should be Code:
echo `echo "hello"` For mor ecample: Code:
echo "echo `date`" echo Thu Sep 10 08:15:31 EDT 2009 echo `echo \`date\`` Thu Sep 10 08:15:12 EDT 2009 |
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09-20-2009
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Quote:
1. As suggested earlier, either "escape" the double quotes surrounding "hello" or use single quote i.e. use Code:
echo "echo \"Hello\" " or echo "echo 'hello' " 2. By doing >$file two times the second echo (i.e. good bye) will over write $file. Instead use Code:
echo "echo 'goodbye'" >> $file to append the contents of the echo into the file. 3. It is a best practice to refrain from creating elaborate scripts using the echo command. Instead use shell "here documents" Code:
cat <<! > $file echo "Hello" echo "Good bye" ! is certainly a lot cleaner. |
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