Collectives™ on Stack Overflow

Find centralized, trusted content and collaborate around the technologies you use most.

Teams

Q&A for work

Connect and share knowledge within a single location that is structured and easy to search.

I want this command to be executed : /bin/sed 's/HOSTNAME=.*/HOSTNAME= server_domain_com /g' /etc/sysconfig/network

Instead of this one : /bin/sed 's/HOSTNAME=.*/HOSTNAME= server.domain.com /g' /etc/sysconfig/network

the string "server.domain.com" is contained in a env variable and I would like to replace the dots by an underscore before replacing the appropriate line in /etc/sysconfig/network.

Thank you!

You can do this with bash substitution too:

/bin/sed -i "s/HOSTNAME=.*/HOSTNAME=${HOSTNAME//./_}/g" /etc/sysconfig/network
The // instructs it to change all occurences (like g in sed). Do not forget the -i flag to actually change the file, not just print it.
        
Thanks for contributing an answer to Stack Overflow!
Please be sure to answer the question. Provide details and share your research!
But avoid …
Asking for help, clarification, or responding to other answers.
Making statements based on opinion; back them up with references or personal experience.
To learn more, see our tips on writing great answers.