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I am VERY rusty with regular expressions and need one to extract a hostname from a fully qualified domain name (FQDN), here's an example of what I have:
myhostname.somewhere.env.com
myotherhostname.somewhereelse.insomeotherplace.byh.info
and I want to return
myhostname
myotherhostname
Would really appreciate some help
I tried "(.+)\." but it matched the string from the right and produced:
myhostname.somewhere.env.
myotherhostname.somewhereelse.insomeotherplace.byh.
678
On your Windows PC, follow these steps to find your FQDN: Launch the Control Panel by searching for "Control Panel" in the Start Menu, or by typing Win+R and typing "control.exe" in the Run menu. On the System Information screen, you will see both the hostname and FQDN of your machine.
A fully qualified domain name (FQDN) is the complete domain name of a specific server or host on the Internet.
The validation of FQDN object is performed using RegEx pattern ^([a-zA-Z0-9. _-])+$ by the system to determine if a given hostname uses valid characters. Where ^ specifies start of a string, and $ specifies end of a string and + indicates one or more strings in the Round Brackets. [a-zA-Z0-9.
Fully Qualified Domain Name (FQDN) mapping enables the Authentication Service to take corrective action in the case where a user may have typed in an incorrect URL. This is necessary, for example, when a user specifies a partial host name or IP address to access protected resources.
use this regexepression (.+?)(?=\.)
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