If you’re facing an EC2 boot issue after Terraform deployment, you’re not alone. In my recent experience using Rocky Linux 9 on AWS EC2, everything worked perfectly after provisioning — until I rebooted. The instance failed to come back online due to a missing NVMe driver in the initramfs, resulting in a kernel panic. Here’s … Read more
When I recently renewed my SSL certificate files from 123-reg, I was confused by all the different files they sent me. If you’ve ever wondered what those various SSL certificate files are for, here’s what I learned through the process. The Certificate Files Breakdown When I downloaded my new SSL certs, I got these files: On my server, I … Read more
Confluence database restoration can be tricky, especially when you encounter permission errors. I just wrapped up a challenging restoration project and wanted to share some key insights that might save you hours of troubleshooting. The biggest challenge? Database privileges. Our restore kept failing with this error: This happens because the SQL dump contains DEFINER clauses … Read more
Bila kita beli pam air di platform e-dagang online, selalunya kita akan jumpa pam yang kononnya boleh capai tekanan sampai 6 bar. Bunyi memang power, tapi betul ke? Ramai tak tahu, sebenarnya kita boleh semak sendiri tekanan sebenar yang pam tu mampu hasilkan — dan bukan ikut sembang penjual semata-mata. Apa Maksud “Head Max” Pada … Read more
Today I want to share my experience setting up a development environment for the ESP8266 (specifically the ESP-12E module) using PlatformIO. If you’re transitioning from Arduino IDE or just getting started with microcontroller development, PlatformIO offers a more robust and flexible environment with better dependency management. Setting Up PlatformIO The first step was creating a … Read more
Kesilapan Umum dalam Pemasangan Solar: Pengajaran dari Kegagalan Sistem RM80K Dalam dunia tenaga boleh diperbaharui, sistem solar semakin menjadi pilihan utama bagi mereka yang ingin menjimatkan kos elektrik serta mengurangkan kebergantungan kepada grid nasional. Namun, pemasangan yang tidak betul boleh menyebabkan kerugian besar dan bahkan kegagalan sistem secara keseluruhan. Salah satu kes yang menarik perhatian … Read more
If you encounter the following error while using AWS Vault: Follow these steps to resolve it. Step 1: Remove the Existing Profile Clear the credentials and sessions for the problematic profile. Step 2: Add the Profile Again Re-add the profile and provide valid AWS credentials (Access Key ID and Secret Access Key). Step 3: Validate … Read more
Explanation: Voltage Divider Formula The voltage divider formula is: $$V_{out} = V_{in} \times \frac{R_2}{R_1 + R_2}$$ Substituting the values: $$V_{out} = 5 \times \frac{1}{4 + 1} = 5 \times 0.2 = 1\,V$$ Therefore, the output voltage (Vout) at the junction is 1V. Voltage dividers are commonly used in electronics to scale down voltages for sensors, … Read more
As interest in renewable energy and sustainable living grows, more people are considering solar power solutions for their homes and businesses. With the Solar Power Calculator for Home Energy Needs, you can quickly estimate your solar requirements, including the necessary battery capacity, solar panel wattage, and inverter size for your home setup. This tool takes … Read more
DIY Air Quality Sensor: Build with ESP8266 and InfluxDB If you’re a DIY enthusiast who enjoys tinkering with smart devices, this project will guide you in building a real-time air quality monitoring system. We’ll use an ESP8266 microcontroller (version 3.0.2) along with the DHT22 and MQ135 sensors to measure temperature, humidity, and gas concentration. The … Read more
Simplified approach to upgrading from InfluxDB 1.8 to 2.7 using Docker Compose: Step 1: Create Docker Compose for InfluxDB 1.8 Step 2: Create Docker Compose for InfluxDB 2.7 Upgrade This will upgrade the data automatically from InfluxDB 1.8 to 2.7. It will create the required structure for InfluxDB 2.x in the ./influxdb2 directory and migrate … Read more
Cara Penyediaan Tanah Campuran untuk Berkebun Berkebun di rumah semakin popular di kalangan masyarakat hari ini, terutamanya bagi mereka yang ingin menikmati sayur-sayuran segar dan bebas bahan kimia. Salah satu elemen penting dalam berkebun adalah penyediaan tanah campuran berkebun dapur yang sesuai. Tanah campuran berkualiti adalah kunci kepada pertumbuhan tanaman yang sihat. Dalam post ini, … Read more
Pengenalan Durian: Status Industri Durian: Varieti Popular: Keperluan Asas Tanaman Durian: Amalan Kultura: Pengurusan Perosak Bersepadu: Penuaian dan Pengendalian Lepas Tuai: Analisa Kewangan:
Ini adalah gambar yang menunjukkan cara kerja panel solar bifasial. Panel solar bifasial ini berbeza dengan panel solar biasa kerana ia boleh menangkap cahaya matahari dari kedua-dua sisi, iaitu bahagian depan dan belakang panel. Berikut adalah penjelasan berdasarkan gambar: Dalam erti kata lain, panel solar bifasial memanfaatkan lebih banyak sumber cahaya, baik dari cahaya matahari … Read more
Panduan tentang pemupukan tanaman cabai (chili) pada berbagai tahap pertumbuhan, yang dilabelkan dengan “HST” (Hari Setelah Tanam). Setiap tahap pertumbuhan memerlukan elemen nutrisi yang berbeda untuk memastikan tanaman cabai tumbuh dengan baik. Berikut adalah penjelasan berdasarkan imej: Gambaran ini memberi panduan untuk memastikan tanaman cabai mendapat nutrien yang tepat pada waktu yang sesuai agar tumbuh … Read more
Berdasarkan gambar yang ditunjukkan fiddle-leaf fig nampaknya mengalami masalah bintik hitam atau coklat, yang biasanya menandakan beberapa kemungkinan isu: Untuk menyelesaikan masalah ini, anda boleh: Adakah anda perasan sebarang perubahan pada cara anda menyiram atau lokasi tumbuhan sejak kebelakangan ini?
Using toys to explain these three placement groups: In short:
Reset password the Zabbix’s users or for the admin itself if you lost their password. Would be easy this command can be reach from alias, place them on the shell you’re currently use. It requires python3 , couldnt know if this support python2, feel free to test. Generate password, my example password as such. To … Read more
“not contain the JNI_CreateJavaVM” – The JNI_CreateJavaVM symbol is a function symbol that is used in the Java Native Interface (JNI) to create a Java Virtual Machine (JVM) instance. If a system does not contain the JNI_CreateJavaVM symbol, it means that the JNI library cannot be loaded properly and that the JVM cannot be created … Read more
Been using letsencrypt for couple of years and manually generate using certbot whenever certificates expired. Yesterday taking sometime to upgrade certbot packages and set up some automation for renewal. I have removed old certbot packages which was installed using yum and then use snap to install new certbot. You can refer to their guides to … Read more