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Facing issues with shell script changes

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# 1  
Old 11-22-2018
Facing issues with shell script changes
My current requirement is to replace xxyxx string with value of date

date1 variable holds a date

and the current script writes html tags to a file as follows

Code:
 echo date1
  nawk 'BEGIN{
  FS=","
  print "<HTML>""<HEAD>""<p>Hi All,<br><br>There are no cases closed on the xxyxx"
  print  "that meet the criteria for submission.</p>"
  }
  END{
  print "<p>Regards,<br>Application Team</p></BODY></HTML>"
  }
  ' /u001/Scripts/abc.txt > /u001/Scripts/abc.html

I have tried like this as follows,

Code:
gawk -i inplace 'NR==1{gsub(/xxyxx/,"$$date1")};1' /u001/Scripts/abc.html

I am getting search string replaced as $$date1 instead I want value of date1

and the following sed command is not working

Code:
sed -i 's/xyxx/'"$date1"'/' /u001/Scripts/abc.html

Moderator's Comments:
Mod Comment Added code tags and deleted duplicate post.
# 2  
Old 11-22-2018
Basically never use options like -i as they have lots of unfortunate side effects, like changing file ownerships and permissions besides destroying your original input if anything goes wrong. It's not worth it just to make a pretty one-liner.

Code:
awk 'NR==1 { sub(OLD, NEW); }; 1' OLD="xxyxx" NEW="XXYXX" inputfile > outputfile
# Uncomment these once you've tested awk does what you want.
# cat outputfile > inputfile
# rm -f outputfile

Last edited by Corona688; 11-22-2018 at 11:46 AM..
# 3  
Old 11-23-2018
A few further comments:
- As you don't use any awk feature in your sample code, why use it at all? A shell "here document" might be way more efficient leading to the same result.
- IF you insist on awk, why run it twice in lieu of putting it all into one script?
- Look into awk's man page to find out about how to pass variables / parameters into it.
- The $$ will lead you nowhere in awk, and yield the process ID in (most) shells.
- Your output will be missing the </HEAD> closing tag, and the <BODY> opening one.
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