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Shell Programming and Scripting

change first word in the every new line

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# 1  
Old 11-01-2008
change first word in the every new line
Hello, i'm new with the scripting on unix and i need such script or maby something to that way:

I need to change the the first word in every new line to a given word. Using just /bin/sh ( not using sed, awk, perl and ect).

I would be very grateful.
# 2  
Old 11-01-2008
Look like a homework, please read the The UNIX and Linux Forums - Forum Rules.
You can use this basic example:
Code:
while read i eol
do
  echo new_word "$eol" >> new.file
done < old.file
mv new.file new.file

# 3  
Old 11-04-2008
#/bin/sh
while read firstword restofline
do
echo $firstword
firstword="word"
done < datafile.txt
#

This part just changes first words, how to glue the first word ant the rest of the line ?
# 4  
Old 11-04-2008
Base on your example
Code:
#/bin/sh
while read firstword restofline
do
echo "word" "$restofline" >> new_file
done < datafile.txt
#

Finlay replace datafile.txt by new_file
Code:
mv new_file datafile.txt

# 5  
Old 11-04-2008
thank you danmero!
# 6  
Old 11-09-2008
I'm sorry, but i'm curious about writting it usig set and awk, can enyone give me a hint how to begin?Smilie
# 7  
Old 11-09-2008
Code:
neword=new_word
sed -i "s/^\([a-z]*\)/$neword/g" file
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