We are writing a shell script for installing a website on linux/solaris machine.

Since we donno shell script we are struggling a lot,and no proper persons to help us here. Our requirement is

Assume I have a file say sachi.txt

It has

Abc
Ssd
Sds
/opt="/opt/sourcecode"
sds

Now we have a shell script which has

Read a

And assume a=sourcecode
Now we need to search sachi.txt for sourcecode pattern and get /opt/sourcecode in a shell variable say $res

You send us the best possible method to do this.

Depending on what you want to get into the variable :

the first line

res=`grep "$a" sachi.txt

worked fine.

but the second stmt
res=`awk -F'=' '$0 ~ Pattern { print $2 }' Pattern="$a"`

did not work
when i execute it,it waits for user input and does nothing

and you are not using the res variable which has the search string in the second statement at all.

i think it should be
res=`awk -F'=' '$0 ~ Pattern { print $2 }' Pattern="$res"`

but how do i solve the "Waiting for user input problem"

I forgot the input file for awk commands :
These are 3 independant commands, you chooses one depending on the result you need (third i think).