Powershell Get FQDN Hostname

Question

I want to retrieve the FQDN name of windows server via powershell script  I have found 2 solution so far    server    Invoke-Command -ScriptBlock  hostname    Above line will print just the short name of the server   sysinfo   Get-WmiObject -Class Win32 ComputerSystem  server       0   1     -f  sysinfo Name   sysinfo Domain   Above two line will get me the FQDN but this looks really nasty code to retrieve just the hostname     So  My question is  is there an easier way to get the FQDN in powershell  I am a bash perl coder and recently picked up powershell   so finding it difficult   Thanks

User · Answer

I use the following syntax      Domain  System Net Dns   GetHostByName  VM  Hostname split       Domain  Domain 1       Domain 2    it does not matter if the  VM is up or down

User · Answer

env computername  env userdnsdomain     will work if separated out like this     env computername    env userdnsdomain

User · Answer

If you have more than one network adapter and more than one adapter is active  f e WLAN   VPN  you need a bit more complex check  You can use this one-liner   System Net DNS   GetHostByAddress   System Net DNS   GetHostAddresses  System Environment   MachineName    Where-Object      AddressFamily -eq  quot InterNetwork quot      Select-Object IPAddressToString  0  IPAddressToString  HostName ToLower

User · Answer

How about   quot  env computername  env userdnsdomain quot  This actually only works if the user is logged into a domain  i e  no local accounts   logged into the same domain as the server  and doesn t work with disjointed name space AD configurations  Use this as referenced in another answer   myFQDN  Get-WmiObject win32 computersystem  DNSHostName  quot   quot   Get-WmiObject win32 computersystem  Domain   Write-Host  myFQDN

User · Answer

Local Computer FQDN via dotNet class   System Net Dns   GetHostEntry  string  env computername  HostName   or   System Net Dns   GetHostEntry  string  localhost   HostName   Reference   Dns Methods  System Net   note  GetHostByName method is obsolete    Local computer FQDN via WMI query   myFQDN  Get-WmiObject win32 computersystem  DNSHostName      Get-WmiObject win32 computersystem  Domain Write-Host  myFQDN   Reference   Win32 ComputerSystem class

User · Answer

A cleaner format FQDN remotely  System Net Dns   GetHostByName  remotehost   HostName

User · Answer

How about this   FQDN  System Net Dns   GetHostByName  VM  Hostname Split       int  i   1  int  x   0  string  Domain    null do        x    i- FQDN Count      Domain    Domain  FQDN  x           i    i   1   until    i -eq  FQDN Count    Domain    Domain TrimEnd

User · Answer

System Net Dns   GetHostByName  hostname   HostName    env computerName returns NetBIOS name of the host  so that both previous examples return netbioshostname domainsuffix  not FQDN   instead of dnshostname domainsuffix  FQDN   for example  host has FQDN aa-w2k12sv-storage something com and NetBIOS name aa-w2k12sv-stor  an easy case  I usually change NetBIOS name   the hostname utility returns dnshostname  i e   the first part of FQDN and code   System Net Dns   GetHostByName  hostname   HostName   returns the right FQDN  Comment  never use the same NetBIOS and DNS names of AD domains and hosts  If your or 3rd party application writes to the log   cannot connect to hostname domainsuffix   what name it tries to resolve  If you see in the log  cannot connect to netbiosname domainsuffix   no doubt  a lazy programmer added domain suffix to the NetBIOS name and you are sure  this is a bug  and can open a ticket to force them to fix the issue

User · Answer

I have the following add   I need to separate out the dns suffix from the hostname   and I only  know  the servers alias shortname    and want to know what the dns suffix is   example   serveralias      MyAppServer us fred com  actualhostname   server01 us fred com   I  know           MyAppServer     I pass this on as an env var called myjumpbox    this could also be  env computername    forname                    env myjumpbox  fqdn                       System Net Dns   GetHostByName  forname  Hostname  shortname                  fqdn split      0   domainname                 fqdn -split  fqdn split      0       dnssuf                     domainname 1      name parts are- alias       forname     actual hostname       shortname     suffix       dnssuf   returns  name parts are- alias  MyAppServer actual hostname  server01 suffix  us fred com

User · Answer

Get-ADComputer   hostname   DNSHostName

User · Answer

to get the fqdn corresponding to the first IpAddress  it took this command   PS C  Windows system32 gt   System Net Dns   GetHostByAddress  System Net Dns   GetHostByName  env computerName  AddressList 0   HostName WIN-1234567890 fritz box   where  System Net Dns   GetHostByName  env computerName  AddressList 0  represents the first IpAddress-Object and  System Net Dns   GetHostByAddress gets the dns-object out of it   If I took the winning solution on my standalone Windows  I got only   PS C  Windows system32 gt   Get-WmiObject win32 computersystem  DNSHostName      Get-WmiObject win32 computersystem  Domain WIN-1234567890 WORKGROUP   that s not what I wanted

User · Answer

To get FQDN of local computer    System Net Dns   GetHostByName  env computerName    or   System Net Dns   GetHostByName  env computerName  HostName   To get FQDN of Remote computer    System Net Dns   GetHostByName  mytestpc1     or  For better formatted value use     System Net Dns   GetHostByName  mytestpc1   HostName    For remote machines make sure host is reachable

User · Answer

Here is a way to determine the FQDN of a server based on the  Name  and  DistinguishedName   Works for multiple domains    server   Get-ADComputer serverName -Server domainName -Properties     select Name  DistinguishedName  domain    server DistinguishedName -split      domain    domain         -like  DC      domain    domain -join      domain    domain -replace  DC    FQDN    server Name          domain

User · Answer

Here s the method that I ve always used    fqdn    ping localhost -n 1  1  split      1

User · Answer

It can also be retrieved from the registry   Get-ItemProperty -Path  HKLM  SYSTEM CurrentControlSet Services Tcpip Parameters               NV HostName       NV Domain  -join

[windows] Powershell: Get FQDN Hostname

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