CentOS 7 yum 安装 MariaDB
yum install -y mariadb-server yum install -y mariadb yum install -y mariadb-libs yum install -y mariadb-devel
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ElasticSearch 查询 语法
1.查询集群的基本运行状况-health curl -XGET 'localhost:9200/_cat/health?v&pretty' 2.集群的节点信息 curl -XGET 'localhost:9200/_cat/nodes?v&pretty' 3.集群 中的索引信息 curl -XGET 'localhost:9200/_cat/indices?v&pretty' 4.根据id查询所需数据
elasticsearch: bootstrap checks failed
**[ERROR][o.e.b.Bootstrap] [localhost] node validation exception [1] bootstrap checks failed [1]: the default discovery settings are unsuitable for production use; at least one of [discovery.seed_hosts, discovery.seed_providers, cluster.initial_master_nodes] must be configured**
Linux 安装 JAVA jdk-11.0.1
**下载：jdk-11.0.2_linux-x64_bin.tar.gz** [https://www.oracle.com/java/technologies/javase/jdk11-archive-downloads.html][1] mkdir /usr/java tar -zxvf jdk-11.0.2_linux-x64_bin.tar.gz vim /etc/profile export JAVA_HOME=/usr/java
debin，ubuntu 清理rc标记的包
dpkg -l | grep ^rc | cut -d' ' -f3 | sudo xargs dpkg --purge删除所有带 rc 标记的dpkg包 **dpkg -l | grep ^rc | cut -d' ' -f3 | sudo xargs dpkg --purge** root@root:/# dpkg -l | grep ^rc | cut -d' ' -f3 | sudo xargs dpkg --purge (Reading database ... 122626 files and directories currently installed.)
