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problem in using sed command in editing a file

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Top Forums Shell Programming and Scripting problem in using sed command in editing a file
# 1  
Old 07-05-2010
problem in using sed command in editing a file
Hi all,

I have a conf file, i want to update some entries in that conf file. Below is the code for that using a temporary file.

Code:
sed '/workgroup=/ c\workgroup=Workgroup' /usr/local/netx.conf > /usr/local/netx.conf.tmp
mv -f /usr/local/netx.conf.tmp /usr/local/netx.conf

Sample contents of netx.conf :-
Code:
workgroup=Workgroup
Use=hosts
security=user1
....
...

I do not want a .tmp file ,please let me how can i update an entry in a file without using a temp file.
Is it possible using awk ??????
Thanks all !!

Last edited by Scott; 07-05-2010 at 08:55 AM.. Reason: Please use code tags
# 2  
Old 07-05-2010
Code:
sed '/workgroup=/ c\workgroup=Workgroup' * /usr/local/netx.conf/ > /usr/local/netx.conf

Last edited by Scott; 07-05-2010 at 08:56 AM.. Reason: Code tags
# 3  
Old 07-05-2010
if yours is GNU, you will get '-i' option in sed which does what you need.
# 4  
Old 07-05-2010
Check if your sed supports the -i option, the so-called in-place editing.
Code:
sed -ie 's/THIS/THAT/' file

# 5  
Old 07-05-2010
i tried all the given commands.....
Whats happening is EITHER 'the new valus is getting prefixed with the old value'(workgroup=newold) OR 'file contents get duplicated (file contents gets repeated).

Even i tried the below ones ,sill aint able to find a soln :
Code:
sed -i -e 's/workgroup=/workgroup=NEW' filename
perl -pi -e s/"${workgroup=}"/"${workgroup=NEW}"/g

Last edited by Scott; 07-05-2010 at 08:56 AM.. Reason: Code tags
# 6  
Old 07-05-2010
Try
Quote:
Originally Posted by ranj14r
Code:
sed -i -e 's/workgroup=.*/workgroup=NEW' filename

# 7  
Old 07-06-2010
after exec the command:
Code:
sed -i -e 's/workgroup=.*/workgroup=NEW' netx.conf

I get some error as ------:
Code:
sed: -e expression #1, char 28: unterminated `s' command

Last edited by Scott; 07-06-2010 at 07:41 AM.. Reason: Code tags, PLEASE!
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