Troubleshooting
Why Your Site Says Not Secure—and How to Fix It
Updated Sep 3, 2026
Fix
Diagnose the failure,
then fix it safely
Search errors, logs, and symptoms to get proven solutions. Follow step-by-step fixes, understand the cause, and verify with confidence.
Avoid pasting passwords, access tokens, private keys, or other secrets.
Start here — Get unstuck fast
I have an error messageSearch exact errors · 85My device is not workingHardware and driver issues · 5System is slow or laggingCPU, memory and I/O · 5Network / Wi-Fi issuesConnectivity problems · 6App / Service is crashingLogs and runtime failures · 2Kernel / Boot problemsBootloops, panic and init · 5
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How every Fix works
Identify the issue
Start with the exact error, log, or observable symptom.
Understand the cause
Connect evidence to known root causes before changing the system.
Apply the safest fix
Prefer reversible steps and clearly label destructive commands.
Verify and confirm
Run an explicit check and compare the expected result.
Existing library
Continue exploring
Networking
Read guide Build a Small Ubuntu LAN That You Can Actually Debug
Connect Ubuntu systems through a switch, decide whether DHCP or an isolated static subnet fits, configure Netplan with rollback, and test each network layer.
Android
Read guide Fix ContextImpl Cannot Be Cast to Activity
`Context` is a capability family, not another name for `Activity`. Find the failing cast, decide whether the operation truly needs a UI owner, and change the API contract instead of swapping context methods until the crash disappears.
Errors & Failures
Read guide Fix apt Stuck at 0% Connecting on Ubuntu
When apt pauses at “0% Connecting,” the last displayed address is evidence, not a diagnosis. Determine whether DNS, IPv6 routing, IPv4 routing, a proxy, TLS, a captive portal, the selected mirror, or an unsupported Ubuntu release is failing before changing system-wide address selection.
Linux
Read guide Fix “sudo: unable to resolve host” on Ubuntu
This warning usually means the machine’s active hostname no longer resolves through its configured Name Service Switch sources. Diagnose the exact name first, correct `/etc/hosts` or hostname configuration safely, and verify through `getent` before changing DNS.
Linux Kernel
Read guide Fix Yocto QA Issue : “was already stripped, this will prevent future debugging !”
Fix Yocto BitBake build warning "QA Issue: binary was already stripped": configure INSANE_SKIP += "already-stripped" or prevent premature binary stripping.
Android
Read guide How to Enable/Disable WiFi problematically in Android ?
Using “setWifiEnabled” API in Android, you can enable or disable Wi-Fi programmatically. Below an example of how … Read more
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