What SubnetSlinger needs, and removing it

What it does: this page lists what SubnetSlinger needs installed (almost nothing), and how to update or remove it.

Self-contained by default: the core tools — ping, trace, DNS, ports, SNMP, speed test, subnet calc, HTTP/TLS/WHOIS, discovery, the local servers, the SSH client, the vault — need nothing installed. They run on the bundled runtime.

A few tools call OS commands that already ship with your system (Windows: netsh, route, ipconfig, arp, sc; Linux: ping (iputils), nmcli, iw, systemctl, and secret-tool from libsecret-tools for the keyring — the ARP table is read from /proc/net/arp). If one isn't present (rare, mostly on minimal Linux), that single tool says so and everything else keeps working.

Two things you install ONLY if you use the tool that needs them:

• Capture (packet analyzer) needs a capture library. On Windows that's the Npcap driver (npcap.com, tick "WinPcap API-compatible mode"). On Linux it's libpcap (usually preinstalled; if not, install libpcap0.8 on Debian/Ubuntu or libpcap on Fedora/Arch) plus a one-time grant: sudo ./install-linux.sh from the unpacked folder. The tool detects a missing piece and tells you.
• SFTP/SCP receive (in Local servers) uses your OS's OpenSSH server — on Windows the OpenSSH Server optional feature, on Linux the openssh-server package. Enable it once (the panel shows the exact commands).

Optional: Lab Testing's throughput test needs iperf3 installed on both ends. It isn't bundled or required.

Updating on Windows: the Microsoft Store updates SubnetSlinger in place — your settings, saved work, Vault and license stay (only uninstalling removes them). After an update from 1.2, connect once (open Account while online) so Pro carries over.

Uninstalling on Windows: Settings → Apps → Installed apps → SubnetSlinger → Uninstall (or right-click it in Start ▸ Uninstall) — the MSIX package uninstalls cleanly, no separate uninstaller needed. Windows keeps the app's data inside the package, so uninstalling REMOVES your settings, inventory, incidents, runbooks, projects, saved hosts, the Activity log, the Vault and the saved license. Only the files in Documents\SubnetSlinger (exports, reports, captures, server folders) are kept. Back up first with File ▸ Back up & restore your work… — the backup leaves out the Vault (note your Vault entries first), and the license comes back when you sign in. If you pressed "Add firewall rules", those rules aren't removed by uninstalling — delete the group 'SubnetSlinger' in Windows Defender Firewall.

Uninstalling on Linux: run ./uninstall.sh from the unpacked folder (sudo ./uninstall.sh if you ran install-linux.sh). It asks first, and keeps your data — ~/.config/SubnetSlinger (settings, saved work, Vault, license) and ~/Documents/SubnetSlinger (exports, captures, server folders) — unless you say yes to a separate question. libpcap, openssh-server and libsecret-tools, if you added them, are system packages you remove separately. The key SubnetSlinger saved in your keyring (labelled "SubnetSlinger secret store key") is removed only if you also say yes to deleting your data (and secret-tool is installed); otherwise it stays until you delete it (Seahorse / KWallet, or: secret-tool clear service SubnetSlinger key protectedstore-key).