It does nothing

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# 1  
Old 07-11-2002
It does nothing

I was running this sed -e 's/D/walter/g' CD* command to replace D with walter in all files that starts with CD,

It executes but D is not replaced

txs fwd
# 2  
Old 07-11-2002
Are you get any error messages?

Are you sure you are in the correct directory containing the file CD*?
# 3  
Old 07-11-2002
Kevin Pryke

Ya I'm in the right Dir

It does give any error It print son screen as if is replacing
then brings me back to the prompt.
I'm using Sco Openserve 5.04

# 4  
Old 07-11-2002
I understand now.

what your doing is

sed -e 's/D/walter/g' CD*

which replaces the D with Walter in each file. The ouput is going to the screen to so the files themselves are unaffected.

You need to redirect the output to a new file name.

The bit of code that I put up before, in your last message should do the trick.
# 5  
Old 07-11-2002
Kevin Pryke

Do I have to write a script or type it as a command

my CD* files are in /u1/walter

I have tried runnin' it as ./ask (ASK been script name)

command line does not work and script cann't execute

# 6  
Old 07-11-2002
If you have multiple CD* files ie CD1, CD2 CD3...and you want to make this substitution for all instances (which I guess you do from your question)... then you should use a for loop. you can do this from a script or a command line. I'd suggest script so that you can run it again...or modify it for later use.


for files in /u1/walter/CD*
sed -e 's/D/walter/g' $files > temp_file
mv temp_file $files

This will take each file in the /u1/walter directory that starts with CD make the substitution to the file and direct the output to a file called temp_file. It will then rename the temp_file to be the origianl filename.

To allow execution change the permissions on the file using chmod 755 ask. Then run as you have tried with ./ask

Hope this helps. (the -e syntax is probably optional in the sed command if you are only using one substitution).
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