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Sed Command to find and delete string from a file.




Scenario-:

So I have a huge host entry and configuration file named as hostname.cfg and a part of the content is shown below

 #cat hostname.cfg

        host_name                mixhost44x
        alias                         test machine
        contact_groups          admins
        hostgroups                mix-Users

Here i have a requirement to delete "  mixhost44x " from the file hostname.cfg.

Syntax  -:  sed 's/word-to-find//g' yourfile.txt > output.txt

So using the above command i can use it as.

                   sed 's/ mixhost44x//g' hostname.cfg > output.txt

  • Sed with backup

         # sed -i.bak 's/ mixhost44x//g' hostname.cfg 

  • Sed without backup 
          # sed -i 's/ mixhost44x//g' hostname.cfg 





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