Hard-links EVE Online config files to keep them roughly in sync.

hardlink.ps1

# Run this script in an Admin(!) Powershell within your EVE settings folder.
# Open the %localappdata%\CCP\EVE folder to dig for the actual settings folder.
# e.g., %localappdata%\CCP\EVE\CCP\EVE\c_eve_sharedcache_tq_tranquility\settings_Low_Graphics

# Set these to the char and user file you want to mirror from.
$charSource = Get-ChildItem "core_char_####.dat"
$userSource = Get-ChildItem "core_user_####.dat"

function HardLink-Many
{
    param(
        $sourceFile,
        $targetFiles
    )
    
    ForEach($target in $targetFiles)
    {
        if($target.Name -ne $sourceFile.Name)
        {
            $targetPath = $target.FullName

            Remove-Item -Path $targetPath
            New-Item -Path $targetPath -ItemType HardLink -Value $sourceFile.FullName
        }
    }
}

$charTargets = Get-ChildItem "." | Where-Object {$_.Name -match "core_char_[0-9]+.dat"}
HardLink-Many $charSource $charTargets

$userTargets = Get-ChildItem "." | Where-Object {$_.Name -match "core_user_[0-9]+.dat"}
HardLink-Many $userSource $userTargets