开心很重要。

NTP和Chrony服务介绍

runlike工具可以输出容器的启动命令whaler工具可以输出容器的Dockerfile。

挂载第三方存储glusterfs,重启节点后mount失效

通过yum安装上mongodb4.2，启动时报下面的错误：MongoDB shell version v4.2.14connecting to: mongodb://127.0.0.1:27017/?compressors=disabled&gssapiServiceName=mongodb2021-05-17T23:13:08.452-0400 E QUERY [js] Error: couldn't connect to server 127.0.0.1:27017, conn

firewall命令systemctl status firewalld #查看firewall防火墙状态firewall-cmd --list-ports #查看firewall防火墙开放端口systemctl start firewalld.service #打开firewall防火墙systemctl stop firewalld.service #关闭firewall防火墙firewall -cmd --reload #重启firewal防火墙sy

报错如下：Password has been already used. Choose another.passwd: Have exhausted maximum number of retries for service解决方案：vim /etc/pam.d/system-authpassword required pam_pwhistory.so use_authtok remember=5 enforce_for_root修改remember=0，保存。然后通过命令pas

安装net-ping包需要环境中有gcc，所有先安装gcc1.更新apt库sudo apt-get updatesudo apt-get upgrade2.安装gccsudo apt-get build-dep gcc3.安装net-pingnpm install net-ping