Unix Shell script to edit a file.

Hi Experts , I am looking for a script which i do this task repeatedly.

I am running a task that will create a file called diff_file. I want to back up this original diff_file in /tmp directory  and rename the diff_file to diff_change.
In the diff_change file I want to remove all the lines starting with <URL> and replace the strings :

tshost to host
tslat to lat
autodev to autoapp
100 to 200
gdev to mep
07592161981mAsked:
Who is Participating?
 
farzanjCommented:
cp diff_file /tmp/diff_file.bak
mv diff_file diff_change
sed -i '/^<URL>/d;s/tshost/host/;s/tslat/lat/;s/autodev/autoapp/;s/100/200/;s/gdev/mep/' diff_change

Open in new window

0
 
07592161981mAuthor Commented:
Thank you for the response. If I Want to remove only the urls in the file , what will be the script.
0
 
farzanjCommented:
Are your URLs starting with http?

you can do like

sed -i '/http:/d' filename

Open in new window

0
Cloud Class® Course: Microsoft Azure 2017

Azure has a changed a lot since it was originally introduce by adding new services and features. Do you know everything you need to about Azure? This course will teach you about the Azure App Service, monitoring and application insights, DevOps, and Team Services.

 
07592161981mAuthor Commented:
The file is an xml file and the url line  start with <URL>http://...</URL>
0
 
farzanjCommented:
Oh, so you can simply use:

sed -i '/<URL>/d' filename

Open in new window

0
 
ahoffmannCommented:
# farzanj's first suggestion corrected and improved:

cp diff_file /tmp/
sed -i '/^<URL>/d;s/tshost/host/g;s/tslat/lat/g;s/autodev/autoapp/g;s/100/200/g;s/gdev/mep/g' diff_file > diff_change

# note that this will change also:  lasthosts to lashost  and 1001 to 2001
# hope your want that
# > remove all the lines starting with
# we take that requirement verbatime, means no leading spaces allowed
0
 
farzanjCommented:
@ahoffmann
My solution was correct and I had tested it.  Just putting globals (which was not mentioned by the asker) does not constitute correction.  You have essentially given my solution again

IMHO you need to correct you solution because when you use sed -i, you don't get any output and therefore your diff_change file will be empty.  Yes, you can remove -i and then it would work but IMHO, I am giving a point my point solution as was asked.
0
 
ahoffmannCommented:
@farzanj, you're right, it must be sed -e instead -i (c&p error)

just see that this question is in cygwin topic, I guess there need to be other solutions posted ;-)
0
Question has a verified solution.

Are you are experiencing a similar issue? Get a personalized answer when you ask a related question.

Have a better answer? Share it in a comment.

All Courses

From novice to tech pro — start learning today.