koungkub

go clean -cache -modcache -i -r

koungkub

sudo chown "$USER":"$USER" /home/"$USER"/.docker -R
sudo chmod g+rwx "$HOME/.docker" -R

koungkub

users:
  - default
  - name: ubuntu
    sudo: ALL=(ALL) NOPASSWD:ALL
    ssh_authorized_keys:
      - {Your local's public key}

koungkub

sbt new sbt/scala-seed.g8

koungkub

version: '3.7'
services:
  pg:
    image: postgres:15-bullseye
    restart: always
    networks:
      - internal
    shm_size: 256mb
    healthcheck:
      test: [ 'CMD', 'pg_isready', '-U', 'postgres' ]

koungkub

# linux-based
netstat -lnptu

# mac-based
lsof -i 8080 | grep LISTEN
ps -ef | grep 1029
kill -9 1029

koungkub

# linux system infomation
lsb_release -a

# macos system information
sw_vers

# kernal information
uname -a

koungkub

# debian based

# Protect Against TCP Time-Wait
net.ipv4.tcp_tw_reuse = 1
net.ipv4.tcp_tw_recycle = 1
net.ipv4.tcp_rfc1337 = 1

# reload
# sysctl -p

koungkub

// install
sudo apt install fio -y

// read
fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=random_read.fio --bs=4k --iodepth=64 --size=4G --readwrite=randread;

// write
fio --randrepeat=1 --ioengine=libaio --direct=1 --gtod_reduce=1 --name=test --filename=random_write.fio --bs=4k --iodepth=64 --size=4G --readwrite=randwrite;

koungkub

#
# /etc/sysctl.conf - Configuration file for setting system variables
# See /etc/sysctl.d/ for additional system variables.
# See sysctl.conf (5) for information.
#

#kernel.domainname = example.com

# Uncomment the following to stop low-level messages on console
#kernel.printk = 3 4 1 3