sed question

Shell Programming and Scripting
1

How can I use sed to

1) delete a create part of a string? Go to position 3 and delete everything after or pattern match to a poistion and delete after that.

2) insert a string into another string?

thanks.

2

Don't use an external command to manipulate strings. The shell can do it with parameter expansion.

See the stringfuncs library in my book, Shell Scripting Recipes: A Problem-Solution Approach. The scripts are available at
http://shell.cfajohnson.com/ssr/ssr-scripts.tar.gz

3

I can't get to the site because of who I work for. More information:

I have these lines in a script:

base_config_a=10.2.03.390
base_config_b=9dk.305md0.00

and so on. I want to use sed to capture everything up to the = , i.e.

base_config_a=
base_config_b=

So my sed one-liner removes everything after the =.

thanks.

---------- Post updated at 03:47 PM ---------- Previous update was at 02:58 PM ----------

Ok. I got the first one be

nawk -F'[=]'  '{print $1 "="}'

this resulted in

base_config_a=

and so on ...

4

Try this sed one liner

sed 's/\(^.*=\)\(.*$\)/\1/'