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JPA : update 报错:Executing an update/delete query; nested exception is javax.persistence.TransactionRequiredException: Executing an update/delete query 阅读全文
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1. 下载安装包 地址: https://downloads.mysql.com/archives/community/ 版本选择 (mysql-server_5.7.27-1ubuntu19.04_amd64.deb-bundle.tar) Product Version: 5.7.27 Oper 阅读全文
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https://www.oracle.com/java/technologies/downloads/archive/ https://www.oracle.com/java/technologies/javase/javase8-archive-downloads.html 阅读全文
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1 查看硬盘 fdisk -l 2 查看目前硬盘挂载情况 df -h 3 格式化硬盘 mkfs.ext4 /dev/xxx 4 创建挂载点 mkdir /data_dir1 5 挂载硬盘 mount /dev/xxx /data_dir1 6 创建开机自动挂载任务 echo '/dev/xxx /d 阅读全文
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https://zhuanlan.zhihu.com/p/354528659 https://blog.csdn.net/mfkjq/article/details/114278434 阅读全文
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ps -aux 查看进程 kill -9 进程ID https://blog.csdn.net/qq_41901122/article/details/113690354 阅读全文
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1 安装必备软件 apt install vim curl wget -y 2 查看ip配置 cat /etc/netplan/00-installer-config.yaml 结果 # This is the network config written by 'subiquity' networ 阅读全文
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1、防火墙 CentOS升级到7之后,发现无法使用iptables控制Linuxs的端口,google之后发现Centos 7使用firewalld代替了原来的iptables。下面记录如何使用firewalld开放Linux端口: 查看防火墙状态 systemctl status firewall 阅读全文
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下载文件: jdk-8u241-linux-x64.tar.gz https://blog.csdn.net/lishuoboy/article/details/114689492 https://www.oracle.com/java/technologies/oracle-java-archiv 阅读全文
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user www-data; worker_processes auto; pid /run/nginx.pid; events { worker_connections 768; # multi_accept on; } http { ## # Basic Settings ## sendfile 阅读全文