Powershell tail multiple files command - powershell

Question

I can tail one file via the following command:
Get-Content -Path C:\log1.txt -Tail 10 –Wait
How do I extend this to multiple files, I have tried the following with no luck:
Get-Content -Path C:\log1.txt,C:\log2.txt -Tail 10 –Wait
This will only pick up updates from the first file, not the second.

Answer 1

Based on #mjolinor's comment, I have come up with the following that appears to work,
Workflow My-Tail
{
Param([string[]] $Path)
foreach -parallel ($file in $path)
{
Get-Content -Path $file -Tail 1 -Wait
}
}
My-Tail (dir C:\*.log -Include log1.txt,log2.txt)
However, this has some sort of progress bar that appears...

Answer 2

I can't speak to how efficient this is, but since I'm using PowerShell Core 7.1.3, I can't use Workflows or ForEach -Parallel, but I can use ForEach-Object -Parallel, so I tried it just to see what would happen...
gci -Path C:\ -Filter log*.txt |
% -Parallel {
cat -Wait -Tail 10 -Path $_
} -ThrottleLimit 30
In my case, I had 27 files I needed to monitor, so I chose a number just above that, and this seemed to work.
Just to be sure it was working, I used this, which will output the source file name before each line:
gci -Path C:\ -Filter log*.txt |
% -Parallel {
$file = $_;
cat -Wait -Tail 10 -Path $file |
% { write "$($file.Name): ${_}" }
} -ThrottleLimit 30

Answer 3

I needed tailed output across multiple files and I wanted to try do it in one line,
here's what I eventually came up with:
gci *.txt -recurse | ForEach-Object { Write-Output "$_`n" + $(Get-Content $_ -tail 5) + "`n" }
Its takes a recursive directory listing of all files named *.txt,
writes the file path to console,
then writes the last 5 lines to console.
I didn't need to follow the tails of the files, they weren't being actively written to.