How to reinstall NVIDIA driver after a linux kernel upgrade In my NVIDIA card-attached PC, the NVIDIA graphic driver always fails to start every time the Linux kernel is upgraded. Whenever I upgrade the kernel version, after a PC restart, the second display cannot connect. I tried running nvidia-smi, it shows an error message
bash How to add admin user To add new user with admin (root) privilege, named "new-username" with password "new-username-pass" sudo adduser new-username sudo usermod -aG root new-username sudo passwd new-usernameThen type new username's password or follow the instruction of the interactive commands. To remove user sudo userdel new-username
bash Useful bash command to use with environment variable My practical use when I want to store scripts in git repository but do not want to expose secret key (password, ...etc) is storing secured data in .env file. It
infra Configure docker to send log to AWS (with many practical commands) In this post I will show how to configure docker to send log from container to AWS cloudwatch log. My tutorial will also show how to debug if something wrong
bash Ubuntu show disk usage by folders (directories) To show disk usage by folderssudo du --max-depth=1 -x -h /To show total disk usage by volumesdf -hSometimes, file is deleted but disk usage is not up-to-date. Because some processes may still be using those deleted files. To show which processes are using
infra Test SMTP configuration from command line In this post, I will show full command line to test a SMTP connection. There are 2 types of configuration, one requires STARTTLS and one does not. Typical configuration has
infra How to generate dh pem file dh.pem is a file containing a very big prime number (1066~2066 bit), generated randomly to be used with SSL certificate. The following command can be used to generate
infra SSL certificates miễn phí với letsencrypt Bài viết này giới thiệu cách cấu hình SSL certificates miễn phí với letsencrypt. Bao gồm: tạo mới, gia hạn tự động, xóa cấu hình. Để tạo mới SSL certificatedocker
infra mysql with docker This post show how to use mysql with docker: install, query, setup phpmyadmin, scheduling backup (to AWS S3) To install(To support phpmyadmin server) First, create $HOME/mysql.cnf with
infra Redis with docker This post shows how to install redis server with docker To start/restart redis serverdocker container stop redis; docker run --name redis -p 6379:6379 -v $HOME/redis:/data --rm
infra Cách cấu hình gửi email trên Ubuntu Bài viết này sẽ giới thiệu cách cấu hình email server trên Ubuntu với sendmail. Bài viết bao gồm: cài đặt, cấu hình SSL, cấu hình spf (trên domain), gửi
python Khởi tạo đa môi trường cho python project Bài viết nhằm giải quyết vấn nạn khi bạn chạy 1 python project ngon lành trên máy mình mà đem sang máy khác thì chết tức tưởi do thiếu các
blog Bình luận về luật An Ninh Mạng Đây là bình luận cho bài viết của anh "Thái" về bộ luật An Ninh Mạng. https://vnhacker.blogspot.com/2018/11/luat-ninh-mang-cho-nao-bao-ve-rieng-tu.htmlHi anh Thái, Bài báo anh đưa
programming Practical coding with multiple timezone It is normal situation that the server, client, database have different timezone. In this blog post, I will introduce my coding practice to handle multiply timezone in web development. To
devops Một vài câu lệnh git (nâng cao) git cat-file -p <commit>. VD: git cat-file -p master. Kết qủatree 78ff5631102bf0a3ffa324aba689eb8f747b3524 parent af17132094f118b6b126b11ca2422fb2f17e65a4 author Tran Sang <tranvansangk41@gmail.com> 1545708057 +0900 committer Tran Sang <
Tip Cách cài đặt docker trên ubuntu Bạn sử dụng những câu lệnh này sudo apt -y remove docker docker-engine docker.io containerd runc; \ sudo apt install -y \ apt-transport-https \ ca-certificates \ curl \ gnupg-agent \ software-properties-common && curl -fsSL
infra Cách thiết lập CSDL mongo thông qua docker English translation is here Trong bài viết này mình sẽ giới thiệu cách thiết lập CSDL (cơ sở dữ liệu) mongo thông qua docker. Bài viết gồm các phần Thiết
infra Cách tạo đường hầm qua SSH Refer this post for more concise and straightforward explanation. Câu chuyện là hôm rồi nói chuyện với thằng bạn làm CTO. Thằng này rất giỏi, hồi học ĐH hay được
infra Deadly simple sock proxy via ssh tunnel You are in front of PC A, for e.g. your company firewall PC A is under a network with a firewall that blocks outbound traffic to some websites. You
backend Ghost mail config with sendgrid In your config.production.json add following entry "mail": { "from": "info@transang.me", "transport": "SMTP", "options": { "port": 587, "host": "smtp.sendgrid.net", "secureConnection": false, "auth": { "user": "apikey", "pass": "your sendgrid
infra How to send your custom email from Gmail via Sendgrid Suppose that you already setup Sendgrid account and request an API from sendgrid. Remember to store the API key somewhere because the key won't be revealed once you close the
infra How to setup CORS for nginx Add the following lines into the location block of your server's nginx.conf If you want to serve the content in any site:add_header Access-Control-Allow-Origin *;If you want to serve the content in some specific sites:add_header Access-Control-Allow-Origin http://my.site.com;
infra Nginx alias vs root directives. Nginx serves static files. Trailing slash in path Sample nginx.conf events { worker_connections 1024; } http { server { listen 80; location /a { root /www; # root without trailing slash } location /b { root /www/; # root with trailing slash } location /c { alias
infra How to debug nginx configuration Check if your nginx was built with --with-debug via nginx -V Sample output of nginx -V nginx -V nginx version: nginx/1.14.0 (Ubuntu) built with OpenSSL 1.1.0g 2 Nov 2017 TLS SNI support enabled configure arguments: --with-cc-opt='-g -O2 -fdebug-prefix-map=
Tip Sort Google Photos by uploaded date Currently, Google Photos does not support sorting photos by uploaded date via UI explicitly. You can use this functionality via this url https://photos.google.com/search/_tra_
