Posts in 2021
Fix Slow Wi-Fi on Mac OS X by Reset Wi-Fi configuration and Advanced Wireless Troubleshooting
in Mac
Fix Slow Wi-Fi on Mac OS X by Reset Wi-Fi configuration and Advanced Wireless Troubleshooting. After use Mac OS X for a long time or OS upgrade, the signal indicate the wifi connection is in good state, however the Wifi connection speed became very slow, with speed test result less than 1MB/s in very good router signal coverage.
Slow Wi-Fi Symptom After use Mac OS X for a long time or OS upgrade, the signal indicate the wifi connection is in good state, however the Wifi connection speed became very slow, with speed test result less than 1MB/s in very good router signal …
Troubleshooting ProtonVPN Linux cli EnableIPv6LeakProtectionError: Unable to add IPv6 leak protection connection/interface
in Linux
protonvpn-cli connect
report An unknown error has occured. Please ensure that you have internet connectivity. If the issue persists, please contact support.protonvpn-cli.log
show error protonvpn_nm_lib.exceptions.EnableIPv6LeakProtectionError: Unable to add IPv6 leak protection connection/interfaceprotonvpn.log
show Error: Failed to add ‘pvpn-ipv6leak-protection’ connection: Insufficient privileges.Environment Linux OS: Debian 10 Buster 64 bit (Fresh install with default options). $ uname -a Linux debian10 4.19.0-17-amd64 #1 SMP Debian 4.19.194-3 (2021-07-18) x86_64 GNU/Linux $ protonvpn-cli -v ProtonVPN CLI v3.8.0 (protonvpn-nm-lib v3.3.2; …
Tips on Hugo SEO
Last Update: in Hugo
Tips on Hugo SEO (Search Engine Optimization). Add describe
metadata
, link build, handle external link, lighthouse SEO checklist etc.Hugo is one of the most popular open-source static site generators. With its amazing speed and flexibility, Hugo makes building websites fun again. However the default hugo template does not take too much consideration on SEO. Here are some tips to …
Custom hugo RSS template
Last Update: in Hugo
Custom hugo RSS content. Add
lastBuildDate
to show the page last modification time. Make a customdescription
like adding image, usedescription
field instead ofsummary
orcontent
.Hugo ships with its own RSS 2.0 template, it generated the RSS feed file as index.xml and embedded into index.html header. e.g. {{ range .AlternativeOutputFormats -}} {{ printf `<link rel="%s" type="%s" href="%s" >` .Rel …
Hugo troubleshooting: execute of template failed: can't give argument to non-function
Last Update: in Hugo
render of “page” failed: execute of template failed: can’t give argument to non-function …
Symptom After upgrade hugo from 0.62.2 to 0.79.1 and run hugo build got following error: $ HUGO_ENV="production" hugo Start building sites … ERROR 2021/05/05 15:01:35 render of "page" failed: execute of template failed: template: …
Android OkHttp change User-Agent header
in Android
Android OkHttp addHeader(“User-Agent”) does not work troubleshooting.
Symptom Use OkHttpClient.Builder() to add User-Agent header. val okHttpClient = OkHttpClient.Builder() .addNetworkInterceptor { chain -> val requestBuilder = chain.request().newBuilder() .addHeader("User-Agent", userAgent) With this code, …
Various ways to load PDF in Android webview
Last Update: in Android
Android webview can not load PDF file by default. Luckily, there are various ways to how to load PDF file in Android webview, like use google service, pdf.js etc.
Pain point: By default, Android WebView cannot load PDF files. :( Luckily, there are various ways to how to load PDF file in Android webview. Open Intent with startActivity If your requirement does not need use embedded webview to show PDF, you can …
Weird Android junit test failure java.lang.NoClassDefFoundError: android/content/Context
in Android
Symptom Have a Android project run junit test fine, suddenly it failed to run unit test with following error: xxxxTest initializationError java.lang.NoClassDefFoundError: android/content/Context at java.lang.Class.getDeclaredMethods0(Native Method) …
ECDSA signature verify in kotlin and Golang
Last Update: in Security
How to verify ECDSA signature generated by kotlin and verify it in Go?
Introduction Elliptic Curve Digital Signature Algorithm (ECDSA) offers a variant of the Digital Signature Algorithm (DSA) which uses elliptic curve cryptography. ECDSA keys and signatures are shorter than in RSA for the same security level. A 256-bit …
Posts in 2020
Test TLS Connection Ciphers TLS Version and Certificate with OpenSSL Command Line
Last Update: in Security
Use OpenSSL command line to test and check TLS/SSL server connectivity, cipher suites, TLS/SSL version, check server certificate etc. TLS 1.2 and TLS 1.3 test support. Force TLS 1.2, Force TLS 1.3. STARTTLS test. openssl s_client example commands with detail output. Works on Linux, windows and Mac OS X.
Introduction openssl s_client is an SSL/TLS client program that can be used to test TLS server connectivity, TLS/SSL version support, check cipher suites, and verify server certificate. It is a very useful diagnostic tool for SSL servers. Usage: …