Hello,

I have a configuration file in the following format: 

DEVICE=eth0
ONBOOT=yes
BOOTPROTO=static
TYPE=Ethernet
IPADDR=10.9.0.200
NETMASK=255.255.0.0
GATEWAY=10.9.1.254

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Some of the parameters above need to update. E.g. IPADDR needs to be updated to say 1.2.3.4. I have written a function that reads the entire file: 

sub read_file {
  local $/ = undef;
  open FILE, $_[0] or die "Couldn't open file: $!";
  $_[1] = <FILE>;
  close FILE;

}

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I call it read_file("config.txt", $file_content); Now $file_content has the entire file in form of string. I don't have option to install packages so need to use standard Perl. Can anyone please help in coming up with perl syntax that would update the config file parameters in the string. I can then write the string back to the file.

In reply to Update config file parameters by pavan.gup

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