# Linux - install: `yubico-piv-tool`, `ykman`, `opensc`, `ykcs11` - find path to `libykcs11.so` ```bash sudo find \ -name libykcs11.so 2> /dev/null ``` ![[images/Pasted image 20251106092403.png]] - add below to `~/.ssh/config` ```bash echo "PKCS11Provider /path/to/libykcs11.so" >> ~/.ssh/config ``` - confirm entry added to `~/.ssh/config`![[images/Pasted image 20251106092437.png]] # Windows - Download `yubico-piv-tool` here: [Releases](https://developers.yubico.com/yubico-piv-tool/Releases/) - Run installation wizard - In order for the `libykcs11.dll` to be found by ssh, add its folder to the Windows environment variable system path - Navigate to Device specification > Advanced > Environment variables > System variables - Select path, then edit - Click new - Add path for folder containing the `libykcs11.dll` file, by default this is `C:\Program Files\Yubico\Yubico PIV Tool\bin\`, then click OK - NOTE: ensure this new entry is above the existing ssh entry - Run below command in PowerShell ```powershell New-Item -Path $env:USERPROFILE\.ssh\ -Name "config" -ItemType "file" -Value 'PKCS11Provider "C:\Program Files\Yubico\Yubico PIV Tool\bin\libykcs11.dll"' ``` - Confirm success with below: ```powershell type $env:USERPROFILE\.ssh\config ``` ![[images/Pasted image 20251106090012.png]] - Restart PowerShell and attempt to connect with `ssh [email protected]` - Also try the long form ssh command below if short form does not work ```bash ssh -v -I "C:\Program Files\Yubico\Yubico PIV Tool\bin\libykcs11.dll" [email protected] ```