java开发rxtx程序

java开发rxtx程序，springboot开发rxtx程序

部署到ubantu服务器上面

部署步骤：
ubuntu安装jdk1.8命令：
sudo apt-get install openjdk-8-jdk
apt-get install lrzsz
查找java安装目录：
/usr/lib/jvm/java-8-openjdk-amd64/jre/bin/java
拷贝jar到目录下面
将 librxtxParallel.so 和 librxtxSerial.so 文件放到${JAVA_HOME}\jre\bin目录下，将 RXTXcomm.jar 包放到{JAVA_HOME}\jre\lib\ext目录下即可
用dmesg | grep tty看看系统启动过程中初始化了哪些串口设备

解决问题参考：
https://www.dianjilingqu.com/84665.html
https://blog.csdn.net/qq_30488445/article/details/126262119
https://blog.csdn.net/qq_29761395/article/details/123007041
https://www.cnblogs.com/xudong1990/p/14849921.html

报错信息：

Err:1 http://ports.ubuntu.com/ubuntu-ports xenial/main armhf vim-runtime all 2:7.4.1689-3ubuntu1
Temporary failure resolving 'ports.ubuntu.com'
Err:2 http://ports.ubuntu.com/ubuntu-ports xenial/main armhf vim armhf 2:7.4.1689-3ubuntu1
Temporary failure resolving 'ports.ubuntu.com'
E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/v/vim/vim-runtime_7.4.1689-3ubuntu1_all.deb Temporary failure resolving 'ports.ubuntu.com'

E: Failed to fetch http://ports.ubuntu.com/ubuntu-ports/pool/main/v/vim/vim_7.4.1689-3ubuntu1_armhf.deb Temporary failure resolving 'ports.ubuntu.com'

E: Unable to fetch some archives, maybe run apt-get update or try with --fix-missing?
再执行apt-get update 还是提示错误

2. 解决办法
百度了下：
使用cat命令追加nameserver设置

cat >> /etc/resolv.conf << EOF

>nameserver 8.8.8.8
>nameserver 8.8.4.4

>EOF

或

echo nameserver 8.8.8.8 > /etc/resolv.conf（还不知道如何换行。。。）

设置完毕查看：

cat /etc/resolv.conf
# Dynamic resolv.conf(5) file for glibc resolver(3) generated by resolvconf(8)
# DO NOT EDIT THIS FILE BY HAND -- YOUR CHANGES WILL BE OVERWRITTEN
nameserver 8.8.8.8
nameserver 8.8.4.4

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