local

docker image ls
docker image prune -a
docker system prune -a
docker stop [container-ID]
docker build -t blogloo-server .
docker-compose build
docker-compose up -d
docker-compose stop
docker-compose -f docker-compose.yml up
docker exec -it [container-ID] sh
docker stats
mysql -usa -p
sudo service docker start
sudo service redis-server restart

aws

ssh -i lu-dev-key.pem [username]@[instance-public-ip]
scp -r -i lu-dev-key.pem ./target/blogloo-0.0.1-SNAPSHOT.war [username]@[instance-public-ip]:~/apps/blogloo/target
scp -r -i lu-dev-key.pem ./var/www/html [username]@[instance-public-ip]:/var/www
sudo yum update

rpm lock

cd /var/lib/rpm
ps -aux | grep rpm
sudo rpm --rebuilddb

docker

Ubuntu: Follow this link and docker-compose, but still need to run sudo usermod -a -G docker [user] and reboot
AmazonEC2: Follow this link

install

sudo amazon-linux-extras install docker
sudo service docker start
sudo usermod -a -G docker ec2-user
sudo chkconfig docker on #autostart
sudo chkconfig docker off
sudo reboot

docker-compose install

sudo curl -L https://github.com/docker/compose/releases/latest/download/docker-compose-$(uname -s)-$(uname -m) -o /usr/local/bin/docker-compose
sudo chmod +x /usr/local/bin/docker-compose
docker-compose version

data migration

docker exec -i mysqldump --no-tablespaces -u -p <database_name> > database_dump.sql
#copy the sql file to target machine, and make sure target mysql container is running
docker cp /path/to/destination/database_dump.sql :/database_dump.sql
docker exec -i mysql -u -p <database_name> < database_dump.sql

nginx

install

sudo yum clean metadata
sudo yum -y install nginx
nginx -v
sudo chkconfig nginx on #autostart
sudo chkconfig nginx off

config and start

sudo nginx -t
sudo nginx -s quit
sudo nginx -s reload
ps -ax | grep nginx
sudo fuser -k 80/tcp
sudo fuser -k 443/tcp
sudo service nginx restart
sudo service nginx status
sudo service nginx stop
sudo less /var/log/nginx/error.log

SSL

install

sudo apt install certbot python3-certbot-nginx
Follow this link

config

Stop nginx server before running certbot

sudo certbot certonly --standalone --preferred-challenges http -d [domain1] -d [domain2] -d [domain3]

renew (stop nginx)

grep CRON /var/log/syslog
sudo certbot renew
sudo certbot renew --dry-run
sudo crontab -e
add 0 0 1 * * \<absolute_path\>/RenewSSL.sh >> "\<absolute_path\>/logs/$(date +\%Y-\%m-\%d_\%H:\%M).log"
sudo systemctl restart crond

linux

performance

top #shift+m
free -h
df -h

add and config swapfile

sudo swapon --show #check if swapfile exists
sudo fallocate -l 5G /swapfile
ls -lh /swapfile
sudo chmod 600 /swapfile
sudo mkswap /swapfile
sudo swapon /swapfile

preserve swapfile settings

sudo cp /etc/fstab /etc/fstab.bak #preserve swapfile settings
echo '/swapfile none swap sw 0 0' | sudo tee -a /etc/fstab

config swappiness

cat /proc/sys/vm/swappiness
sudo sysctl vm.swappiness=10
sudo vi /etc/sysctl.conf
add vm.swappiness=10

config cache_pressure

cat /proc/sys/vm/vfs_cache_pressure
sudo sysctl vm.vfs_cache_pressure=50
sudo vi /etc/sysctl.conf
add vm.vfs_cache_pressure=50