Modification of configuration file using sed

Question

mongod.conf file

 # mongod.conf
 # for documentation of all options, see:
 # http://docs.mongodb.org/manual/reference/configuration-options/
 # Where and how to store data.
   storage:
   dbPath: /var/lib/mongodb
   journal:
   enabled: true
 #  engine:
 #  mmapv1:
 #  wiredTiger:
 # where to write logging data.
   systemLog:
   destination: file
   logAppend: true
   path: /var/log/mongodb/mongod.log
 # network interfaces
   net:
   port: 27017
   bindIp: 127.0.0.1
 #processManagement:
 #security:
 #operationProfiling:
 #replication:
 #sharding:
 ## Enterprise-Only Options  
 #auditLog: 
 #snmp:

This is the mongoDB configuration file I have, I need to Update keys in the file like this,

port: 27017 
bindIp: 0.0.0.0 
#security: 
keyFile:/opt/mongodb/keyfile 
authorization: enabled 
#replication: 
replSetName: mongoreplica1

How can I do this using bash script?

Answer 1

You may fix the sed command using

sed -i 's/^\( *bindIp *: *\).*/\10.0.0.0/'

The BRE POSIX pattern ^\\( *bindIp *: *\\).* matches

• ^ - start of string
• \\( *bindIp *: *\\) - Capturing group #1 (referred to with \\1 from the RHS): zero or more spaces, bindIp , zero or more spaces, : and zero or more spaces
• .* - rest of the line