lsb_release -a
lscpu

# start with reboot
systemctl enable nginx.service       
systemctl enable supervisord

systemctl disable nginx.service
systemctl disable supervisord

systemctl is-enabled nginx
systemctl is-enabled supervisord
# show all
systemctl list-unit-files --type service -all

# start
systemctl start <service-name>
systemctl stop <service-name>
systemctl restart <service-name>
systemctl status <service-name>

service --status-all
service <service-name> start
service <service-name> stop
service <service-name> restart
service <service-name> status

# 安装jdk8
sudo apt install openjdk-8-jdk
whereis java

# 配置jre等包,不配置的话，运行的java程序，会找不到CLASSPATH下的包，导致一些功能不能正常使用，比如远程debug
vim ~/.profile
export JAVA_HOME=/usr/lib/jvm/java-8-openjdk-amd64
export JRE_HOME=$JAVA_HOME/jre
export CLASSPATH=$JAVA_HOME/lib:$JRE_HOME/lib:$CLASSPATH
export PATH=$JAVA_HOME/bin:$JRE_HOME/bin:$PATH

sudo ufw allow 22/tcp
sudo ufw allow 21/tcp
sudo ufw allow 23/tcp
sudo ufw allow 80/tcp
sudo ufw allow from 59.75.133.222
sudo ufw enable|disable


sudo ufw delete allow 22/tcp
sudo ufw delete allow 21/tcp
sudo ufw delete allow 23/tcp
sudo ufw delete allow 80/tcp