Edit hosts file using powershell script-CodePudding

I want to create powershell script which gonna detect machine's ip address for example 10.10.10.2 and then looks into hosts file , if there is different ip addresses for example:

10.10.20.5 - test1env.test.loc 10.10.20.6 - test2env.test.loc 10.10.20.7 - test3env.test.loc 10.10.20.8 - test4env.test.loc

then it should replace third column's number with it's current ip address's third column number, it should look like this after script runs:

10.10.10.5 - test1env.test.loc 10.10.10.6 - test2env.test.loc 10.10.10.7 - test3env.test.loc 10.10.10.8 - test4env.test.loc. is it possible to create script which gonna do this?

CodePudding user response：

You can achieve this by reading the file and replacing said entries. It could be easier to replace the whole start of it rather than just a portion. Assuming that the private network could also change to say 172.16 that would make it work even in that case.

To achieve what you want to do you likely need:

A way to get the IP (e.g. Powershell get ipv4 address into a variable)
A way to read a file (Get-Content)
A way to replace a string (e.g. -replace, see about_Comparison_Operators)
A way to write that file (Set-Content or Out-File would do)

The pseudo code could look like this:

$ip = findIPs()
$hosts = Get-Content hosts
$oldip = findOldIP($hosts)
$hosts -replace $oldip,$ip | Set-Content hosts