Links

A Brief Look at Go Iterators

A Brief Look at Go Iterators type Seq[V any] func(yield func(V) bool) type Seq2[K, V any] func(yield func(K, V) bool)

Saturday, September 6, 2025 Read

Docker Containers Can't Access the Internet? NAT Configuration Guide for nftables

Docker Containers Can’t Access the Internet? NAT Configuration Guide for nftables

Wednesday, September 3, 2025 Read

Dedicated Server CPU Frequency Maximization Guide

Dedicated Server CPU Frequency Maximization Guide Check which CPU mode is in use Prerequisites System: Linux (Debian, Ubuntu, Proxmox, etc.) Privileges: root CPU: supports dynamic frequency scaling (Intel Xeon, AMD EPYC / Ryzen, etc.) governor cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor powersave: low-power mode (locked low frequency, power-saving but weak) ondemand: on-demand boost (only boosts when needed, may respond a bit slowly) performance: full performance (this is what we want) Check which driver the kernel uses (Intel / AMD) cat /sys/devices/system/cpu/cpu0/cpufreq/scaling_driver

Tuesday, September 2, 2025 Read

6首國際最強公認催眠曲

6 首國際最強公認催眠曲 Marconi Union - Weightless 432Hz (深度治癒身心靈連接宇宙能量) Clair de Lune Deep sleep delta waves - Binaural beats sleep (30 分鐘版本) Erik SATIE - Gymnopédie No. 1 (鋼琴慢速版) Himalayan Healing - Tibetan Singing Bowls Meditation (15 分鐘版本)

Friday, August 29, 2025 Read

Use LinuxServer.io Docker Images to Turn Desktop Apps into Web Apps

Use LinuxServer.io Docker Images to Turn Desktop Apps into Web Apps LinuxServer.io Official Site

Friday, August 1, 2025 Read

Gluetun: Route Docker Containers Through a VPN, Disconnect on No Network

Gluetun: Route Docker Containers Through a VPN, Disconnect on No Network Gluetun OpenVPN services: gluetun: image: qmcgaw/gluetun container_name: gluetun restart: unless-stopped cap_add: - NET_ADMIN devices: - /dev/net/tun:/dev/net/tun ports: - 8888:8888/tcp # HTTP proxy - 8388:8388/tcp # Shadowsocks - 8388:8388/udp # Shadowsocks volumes: - /home/user/gluetun:/gluetun environment: # Fill in based on your VPN provider's OpenVPN config - VPN_SERVICE_PROVIDER=protonvpn - VPN_TYPE=openvpn - OPENVPN_USER= # OpenVPN username - OPENVPN_PASSWORD= # OpenVPN password - SERVER_COUNTRIES=United Kingdom # Set server country, separated by commas networks: # (Optional) fixed IP for the Gluetun container network: ipv4_address: 172.27.0.5 networks: # (Optional) fixed IP for the Gluetun container network: driver: bridge ipam: config: - subnet: 172.27.0.0/16 gateway: 172.27.0.5 WireGuard services: gluetun: image: qmcgaw/gluetun container_name: gluetun restart: unless-stopped cap_add: - NET_ADMIN devices: - /dev/net/tun:/dev/net/tun ports: - 8888:8888/tcp # HTTP proxy - 8388:8388/tcp # Shadowsocks - 8388:8388/udp # Shadowsocks volumes: - /home/user/gluetun:/gluetun environment: - VPN_SERVICE_PROVIDER=protonvpn # Fill in based on your VPN provider's WireGuard config - VPN_TYPE=wireguard - WIREGUARD_PRESHARED_KEY= # Preshared key - WIREGUARD_PRIVATE_KEY= # Private key - WIREGUARD_ADDRESSES= # Set IPv4 and IPv6 addresses, separated by commas - SERVER_COUNTRIES=United Kingdom # Set server country, separated by commas networks: # (Optional) fixed IP for the Gluetun container network: ipv4_address: 172.27.0.5 networks: # (Optional) fixed IP for the Gluetun container network: driver: bridge ipam: config: - subnet: 172.27.0.0/16 gateway: 172.27.0.5 Let containers use Gluetun’s VPN connection If the service and Gluetun are in the same docker-compose, add network mode: network_mode: “service:gluetun” If the service is in a different docker-compose from Gluetun, add network_mode: “container:gluetun” Open Gluetun’s docker-compose file and re-add the service ports you need (e.g. 8080) Start Gluetun first, then start services that should use Gluetun’s VPN connection The container’s public IP should match the VPN server you selected

Friday, August 1, 2025 Read

Go Practical Guide: Execute Lua Scripts with go-redis

Go Practical Guide: Execute Lua Scripts with go-redis Redis command Eval Redis package redis.NewScript, script.Run

Tuesday, July 22, 2025 Read

TIL: timeout in Bash scripts

TIL: timeout in Bash scripts timeout 1m ./until.sh wrap timeout 1m bash -c "until curl --silent --fail-with-body 10.0.0.1:8080/health; do sleep 1 done"

Thursday, June 12, 2025 Read

TaigiTube - Taiwanese Hokkien YouTube

Thursday, May 8, 2025 Read

I use Zip Bombs to Protect my Server

I use Zip Bombs to Protect my Server What happens is, they receive the file, read the header that instructs them that it is a compressed file. So they try to decompress the 1MB file to find whatever content they are looking for. But the file expands, and expands, and expands, until they run out of memory and their server crashes. The 1MB file decompresses into a 1GB. This is more than enough to break most bots. However, for those pesky scripts that won’t stop, I serve them the 10MB file. This one decompresses into 10GB and instantly kills the script.

Saturday, May 3, 2025 Read

Everyone Needs an HTTP Proxy to Debug

Everyone Needs an HTTP Proxy to Debug Charles Burp Suite mitmproxy

Friday, April 25, 2025 Read

Why are QR Codes with capital letters smaller than QR codes with lower-case letters?

Why are QR Codes with capital letters smaller than QR codes with lower-case letters? If you want the smallest possible physical size for a QR code which contains a URl, make sure the text is all in capital letters.

Wednesday, April 23, 2025 Read