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性能指标 一般来说 I/O 性能指标有这几个： 使用率：ioutil，指

Redis Cluster slave 重做 redis 集群 redis cluster 采用的是去中心化的设计，方便集群在后续的

GitLab 迁移升级 step 1 、配置 docker-compose mkdir gitlab-compose cat << EOF >>gitlab-compose/docker-compose.yaml version: '3.3' services: gitlab-ce: image: gitlab/gitlab-ce:8.14.0-ce.0 container_name: gitlab-ce environment: GITLAB_OMNIBUS_CONFIG: | external_url 'http://192.168.166.166:18080'

使用本地 kubeconfig 配置文件生成客户端证书，jenkins 利用客户端证

step 1 upgrade openssl 1、download openssl from openssl wget https://www.openssl.org/source/openssl-1.1.1n.tar.gz 2、compile and install

Reset root password on rhel7 reboot to grub during boot to grub2 ,press e to edit grub settings. scroll down to linux16 line and add rd.break at the end of the line.

Virtualbox USB Not Work After installation Virtualbox Ext package, You need add current host user to vboxusers group ,otherwise you can’t find local device on vm. sudo adduser username vboxusers reboot

Move Mysql 8.X Data Directory on Ubuntu 1804 Moving Data Directory systemctl stop mysql rsync -av /var/lib/mysql /data mv /var/lib/mysql /var/lib/mysql.bk Modify configuration vim /etc/mysql/mysql.conf.d/mysqld.cnf # change datadir= to another directory Configuring AppArmor Access Control Rules vim /etc/apparmor.

Mysql 连接方式 Mysql 有两种连接方式： TCP/IP Socket 默认情况下使用 socket 进行本地连接