Shell Programming and Scripting

awk -v cnt=0 -v replace="    " '/'$cc'/ {if (cnt=="0"){sub(/$cc/,replace)};cnt++} {print}' in.file > out.file

or

awk -v cnt=0 -v cc=$cc -v replace="    " '$0 ~ cc {if (cnt=="0"){sub(/$cc/,replace)};cnt++} {print}' in.file > out.file

cat in.file|awk -v cnt=0 -v replace="NEWSTUFF" "/$cc/{if (cnt=="0"){sub(/$cc/,replace)};cnt++} {print}" > out.file

$ echo something | awk "{print $NF}"   
something
 
$ echo something | awk "{ if ($1 == "something") A=$1 }"
awk: { if ( == something) A= }
awk:        ^ syntax error
 
$ echo something | awk "{print "Here is " $NF}" 
awk: cmd. line:1: {print Here
awk: cmd. line:1:            ^ unexpected newline or end of string
 
$ echo something | awk "{print 'Here is ' $NF}"
awk: {print 'Here is ' }
awk:        ^ invalid char ''' in expression
 
$ echo something | awk "{print \"Here is \" $NF}"
Here is

awk -v cc=$cc '...' file1 file2 ... etc.
or
awk '...' cc=$cc file1 dd=$dd file2 ... etc.