Insert a line including Variable & Carriage Return / sed command as Variable

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# 1  
Old 05-19-2009
Insert a line including Variable & Carriage Return / sed command as Variable

I want to instert Category:XXXXX into the 2. line

something like this should work, but I have somewhere the wrong sytanx. something with the linebreak goes wrong:

sed "2i\\${n}Category:$cat\n"


Titel Blahh Blahh abllk sdhsd sjdhf
Blahh Blah Blahh

Should look like this afterwards;

Titel Blahh Blahh abllk sdhsd sjdhf
Category:The Blahh
Blahh Blah Blahh

2. Question: how should the syntax be, if the sed command itself should be a variable, like:

insertcat="sed "2i\\${n}Category:$cat\n""
# 2  
Old 05-20-2009
you can use awk
awk '{if(NR==2){print "Category:"$0}{print $0}}' filename

# 3  
Old 05-20-2009
awk 'NR==2{print "Category:TheBlah\n"$0;next}1' file

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