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How to substitute a word in multiple file?

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# 1  
Old 10-24-2017
How to substitute a word in multiple file?
Team,

I want to change below parameter in all the files in a directory,

Check for HOSTNAME=`hostname`
Change to HOSTNAME=localhost

And I tried below but, its not working ☹

Code:
find /tmp -type f -exec sed 's/"HOSTNAME\=\`hostname\`"/"HOSTNAME\=localhost/g'"

Help me if I am missing something ...

Moderator's Comments:
Mod Comment Please use CODE tags as required by forum rules!
Last edited by RudiC; 10-24-2017 at 12:11 PM.. Reason: Added CODE tags.
# 2  
Old 10-24-2017
Wildly guessing what might be "not working" I came up with
Code:
find /tmp -type f -exec sed 's/HOSTNAME=`hostname`/HOSTNAME=localhost/g' {} \;

Does this do what you want? But - this will output all modified files to stdout; correct redirections may not be that easy to find.
Last edited by RudiC; 10-24-2017 at 12:44 PM.. Reason: Removed escaping the "=" char as proposed by rdrtx1.
# 3  
Old 10-24-2017
Use -i option for sed (if supported). No need to escape the "=" (or maybe for some versions of sed).
# 4  
Old 10-24-2017
Quote:
Originally Posted by RudiC
Wildly guessing what might be "not working" I came up with
Code:
find /tmp -type f -exec sed 's/HOSTNAME=`hostname`/HOSTNAME=localhost/g' {} \;

Does this do what you want? But - this will output all modified files to stdout; correct redirections may not be that easy to find.
My bad, still its not get substituting, I used below one
Code:
find /tmp -type f -exec sed 's/HOSTNAME=`hostname`/HOSTNAME=localhost/g' {} \;

Moderator's Comments:
Mod Comment
Please wrap all code, files, input & output/errors in CODE tags.
It makes it easier to read and preserves spaces for indenting or fixed-width data.
Last edited by rbatte1; 10-24-2017 at 01:44 PM.. Reason: Added CODE tags
# 5  
Old 10-24-2017
Sorry: no info - no help.
# 6  
Old 10-24-2017
Quote:
Originally Posted by RudiC
Sorry: no info - no help.
I mean after executing the command the pattern is not getting changed/substituted with the new one. .. It remains the same old one...

---------- Post updated at 12:31 PM ---------- Previous update was at 12:24 PM ----------

Quote:
Originally Posted by natraj005
I mean after executing the command the pattern is not getting changed/substituted with the new one. .. It remains the same old one...
It is working if the dirctory have only one file, but in my condition I have around 40 files in the direcyiry and in that 40 files around 7 files will have my search pattern and that has to be changed with new pattern.
# 7  
Old 10-24-2017
I mean it worked perfectly on my linux system, and so there's no reason to believe it doesn't on yours unless you show us
- your OS, shell, find, and sed versions
- input data (file names, directory contents, files' contents)
- DETAILED error description
- system and / or error messages

What do you expect people in here to work upon?
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