topic Re: need help with shell scripting 101 class in Operating System - HP-UX

need help with shell scripting 101 class

Randy Hagedorn — Tue, 05 Apr 2005 14:09:45 GMT

Hi,

I am a novice at HP-UX shell scripting. I need help with the syntax of the following.

File A, contains "Buggers".

I want file B with the results of "Huggers Buggers". How would I write a script to concatenate "Huggers " with "Buggers"?

Thanks,
Randy

Re: need help with shell scripting 101 class

Hein van den Heuvel — Tue, 05 Apr 2005 14:17:55 GMT

First lesson:

review your questions from the audience perspective. In doing so, you may actually solve the problem.

In this case... where is 'Huggers' coming from? File C? Every other lines in file A?

You might not needs a scripts... the 'paste' command may well do just what you need.

Cheers,
Hein.

Re: need help with shell scripting 101 class

Pete Randall — Tue, 05 Apr 2005 14:19:55 GMT

Try:

cat Huggers Buggers > HuggersBuggers

Pete

Re: need help with shell scripting 101 class

Randy Hagedorn — Tue, 05 Apr 2005 14:29:28 GMT

To claify my question.

I want to 'hardcode' "Huggers " before whatever value is in file A, so that "Huggers " always preceeds the contents of File A and is written to File B.

Thanks,
Randy

Re: need help with shell scripting 101 class

Bob Smith_23 — Tue, 05 Apr 2005 14:35:45 GMT

sed 's/^/Huggers /' FileA > FileB

sed 's/Buggers/Huggers Buggers/' A > B

Re: need help with shell scripting 101 class

A. Clay Stephenson — Tue, 05 Apr 2005 14:41:43 GMT

# Pure Shell solution

OFILE="FileB"
echo "Huggers \c" > ${OFILE}
cat FileA >> ${OFILE}

Re: need help with shell scripting 101 class

Biswajit Tripathy — Tue, 05 Apr 2005 14:41:44 GMT

Solution 1)

while read -r line
echo "Huggers $line"
done < FileA > FileB

Solution 2)

cat FileA | sed 's/^/Huggers //' > FileB

- Biswajit

Re: need help with shell scripting 101 class

Jim Butler — Tue, 05 Apr 2005 14:42:50 GMT

If buggers is the only thing in file a,

cat filea | while read line
do
var1=$line
echo "Huggers $line"
done

If buggers is field 3 in file a,
lets say filea has the following text

bob has buggers the size of idaho
sally has BugGers that are smaller

Then you want to pick the third word out of file a

cat filea | while read line
do
word=`awk '{print $3}' $line`
echo "Huggers $line"
done

would output
Huggers buggers
Huggers BugGers

Don't forget the shebang line is the first line of your script, and specifies the shell

she - bang #! - get it?
(The exclamation point is the BANG, the pound sign is the comment shhhh)

good luck

Re: need help with shell scripting 101 class

Hein van den Heuvel — Tue, 05 Apr 2005 14:47:14 GMT

>> I want to 'hardcode' "Huggers " before whatever value is in file A, so that "Huggers " always preceeds the contents of File A and is written to File B.

Ah! Clear:

# cat > a
aap
noot
mies
# perl -ne 'print "Huggers $_"' a > b
# cat b
Huggers aap
Huggers noot
Huggers mies

or

# awk '{print "Huggers " $0}' a
Huggers aap
Huggers noot
Huggers mies

Cheers,
Hien.

Re: need help with shell scripting 101 class

Randy Hagedorn — Tue, 05 Apr 2005 15:20:58 GMT

Thanks all for you participation. It's obvious that there is more than one way to do things in Unix.

It seems that I need to take a class in scripting and / or the command language.

Thanks,
Huggers Buggers