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【OpenGauss】CentOS安装 1、关闭防火墙 修改 vim /etc/selinux/config SELINUX=disabled # 禁止自动启动 systemctl disable firewalld.service # 停止防火请 systemctl stop firewalld. 阅读全文
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# Disabling symbolic-links is recommended to prevent assorted security risks #symbolic-links=0 # Settings user and group are ignored when systemd is u 阅读全文
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【CentOS7】安装ffmpeg 编译器 yum -y install gcc cc cl 下载解压yasm cd /ycx wget http://www.tortall.net/projects/yasm/releases/yasm-1.3.0.tar.gz tar -zxvf yasm-1. 阅读全文
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文档删除 1、单个 2、批量 阅读全文
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文档更新 1、单个 2、批量 阅读全文
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创建空索引 PUT myindex { "settings": { "number_of_shards": 1, "number_of_replicas": 1 }, "mappings": { "properties": { "name": { "type": "keyword", "ignore 阅读全文
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对象 @ConfigurationProperties(prefix = "system-upload-prefix") @Configuration @RefreshScope @Data public class SystemUploadPrefix { private String uploa 阅读全文
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String.format 1、字符串左对齐,不足10位的右侧补空格:[123 ] String.format("%-10s", "123"); 2、字符串右对齐,不足10位的左侧补空格:[ 123] String.format("%10s", "123"); 3、整数格式化10位,不足左侧补0:[ 阅读全文
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【CentOS7】rsync文件同步 阅读全文
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【Java Web】行锁for update begin; select * from system_role where id_ = '1626887644786495491' for update; update system_role set version_ = 0 where id_ = 阅读全文