Shell-script - Bash script to add dns in etc hosts, Add DNS if host does not exists

Bash script to add dns in etc hosts

shell script to add DNS or host entry in /etc/hosts

The below scrip will search for the given IP and the DNS or host in /etc/hosts file

  # Declare the ip which you want to add
  ip="127.0.0.1"

  # Execute grep command to find IP and store it 
  found=$(grep -lr "$ip" /etc/hosts)

  # Evaluate the IP or DNS is found or not
  if [[ $found != "/etc/hosts" ]]; then
    echo "127.0.0.1       localhost.localdomain   localhost" >> testecho
    echo 'DNS or host is added in /etc/hosts'
  else
    echo 'ip exists!!'
  fi

In this script the grep command searches for given ip and lists the file /etc/hosts

The result is stored in the variable found. If the value stored in the variable found is equal to /etc/hosts then the DNS or host value will not be added or appended into the /etc/hosts. Else the DNS or host will be added into the file /etc/hosts

OUTPUT:

[shell-script]# sh add-dns.sh 
DNS or host is added in /etc/hosts

[shell-script]# cat /etc/hosts
::1	localhost6.localdomain6	localhost6
127.0.0.1	localhost.localdomain	localhost

Here when the script is executed the host or DNS value is added / appended to the file /etc/hosts

The topic on Shell-script - Bash script to add dns in etc hosts is posted by - Math

Hope you have enjoyed, Shell-script - Bash script to add dns in etc hostsThanks for your time