shell scripting find/replace text

[phunni]

I have a project that a shell script is going to deploy on a server for me ni both a testing and a staging context. Some paths, db connection strings etc, will be different for my development environment and boththe staging and testing environments.

 

How can I, in a shell script (for bash) do a simple find and replace for text? Is it possible?

[sellis]

Does sed do what you want?

[phunni]

from a brief scan of the man page - possibly. Is this going to involve the use of regular expressions?

[ramfree17]

yes. and if you are like me who suck at regular expressions then having somebody handy to teach you (like aru for example if you can get his attention long enough ) the intricacies of RE+sed. not everything i scripted worked the way i planned them to but the simple expressions work well enough. :)

 

ciao!

[theYinYeti]

I may help you, but I don't have the time to explore all possibilities, so please post a specific example:

- Input data (env. number or name, ...)

- Rules (eg here at work, we have numbered envs, and we can access the logs like that: \\server\env_${ENV}\logs)

- Example of expected result.

 

Yves.

[Qchem]

In general:

 

sed s/foo/bar/g

 

(the g causes global replacement)

 

this will replace foo by bar. If you're lucky you might not actually need reg exp if you're looking for a unique string.