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Shell Programming and Scripting

replace a line in a file

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# 8  
Old 03-14-2009
Code:
  awk -v var="12345" ' 
  /ABC/ {sub ($3, var)}
  {print}
  ' $file > $file.temp
  mv -f $file.temp $file

I'm having some issues with this part because sometimes there's alot of the same values.

Example:

cat test.file
ABC 0 0 0 0 0 313131 0 0 13131313 0 34214325 0234234

Applying the above command would result in:

cat test.file
ABC 12345 0 0 0 0 313131 0 0 13131313 0 34214325 0234234

while I need it to be:

ABC 0 12345 0 0 0 0 313131 0 0 13131313 0 34214325 0234234

How to fix?
# 9  
Old 03-14-2009
The code should be:

Code:
awk -v var="12345" ' 
  /ABC/ {$3=var}
  {print}
  ' $file > $file.temp
  mv -f $file.temp $file

Regards
# 10  
Old 03-14-2009
Works like a harm, thank you Franklin.
# 11  
Old 03-16-2009
Code:
line: the specific line to be replaced
col:  the specific column to be replaced
val:  the value going to replace others
nawk -v line=3 -v col=4 -v val="---" 'NR==line{$col=val}1' filename
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