#Bash script to get ip address full#
#Bash script to get ip address mac#

The most reliable way is asking an outside web server to tell you what is your IP address, and the most reliable DNS servers in the world right now are owned by Cloudflare. The point is, that the ways in which it can fail are numerous and you probably should consider either a) specifying more precisely what systems you are targeting or b) whether you really need to know the IP at all - is a solution that seems to work in simple cases worth using when it fails miserably in slightly more complicated setup? If you think you need the IP, prepare a way to handle failures gracefully in cases where you either don't get the IP at all or you get a wrong one. So I needed a way to determine the IP address of the host computer from the Bash script that was launching the processes. etc/hostname: does not need to exist, on many systems it is /etc/HOSTNAME, and it does not contain IP address rather it should contain the hostname (usually the FQDN). The script will collect information from Redhat and So. What if the machine has more NICs? How do you tell what IP is the right one? What if only IPv6 is used on the machine's LAN? In any case, you'll get the least public IP you can (and possibly a wrong one if more interfaces are configured on the machine - which often is the case these days with omnipresent virtualization using network tap devices and/or). For a more reliable answer, use the dig command instead like 'dig +short' to get your IP from a DNS server. I am trying to write a scrip that will collect the hostname, IP and total memory installed on remote hosts from a list I feed into the script. Ifconfig: must run as root, otherwise you'd have to try /sbin/ifconfig or /usr/sbin/ifconfig as well.

Currently I make the user set the IP address.

#Bash script to get ip address full#

I am currently using docker-compose to create a local version of my full deployment, however I cant access it using localhost or 127.0.0.1, I have to refer to the current machines IP address, for example curl 192.168.0.23:80.

#Bash script to get ip address mac#

How much public public IP are you looking for? What if the machine is behind NAT?Ĭurl / wget / netcat ( nc) which contains requester's address: should work most of the time, but may the site may be unreachable from the machine (be it firewall or temporary/permanent unavailability). I need to get the IP address the same way for Windows Linux and Mac OS.