0
curl http://v6.ipv6-test.com/api/myip.php returns me my current IPv6 addr.
I'd like to use this string as part of a filename to be created, followed by timestamp of when the script ran.
Any idea how that could be done?
Hikari
Posted 2019-08-17T02:47:36.087
Reputation: 268
1
To use the result of a string as a variable, use the $(command) construct (aka command substitution):
whatevercommand >$(curl http://v6.ipv6-test.com/api/myip.php)-$(date '+%F@%T')
However, in this specific case, this is a bit dangerous since in case of network problems you can get something unexpected, so it is best to get the address separately:
myip=$(curl http://v6.ipv6-test.com/api/myip.php)
[[ $? -ne 0 ]] && exit 1
whatevercommand >$myip-$(date '+%F@%T')
In practice you can get your ipV6 address using ip address show.
xenoid
Posted 2019-08-17T02:47:36.087
Reputation: 7 552
Thanks a lot! I'm gonna try it, I'm very noob on bash scripting. My intent is to append on a flat file the datetime and current IP, so that I can log if my IP is changing. Later I'll try to store in another file the last IP found, then compare with current one, and make some notification in case it changed. – Hikari – 2019-08-21T20:04:42.860