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Most of the environments described in this article are based on linux. For a program, under Linux, we can find the corresponding process ID according to the program response information: ps -ef | grep java | grep -v grep | |awk '{print $2}' In this way, we can get the process id and PID of the corresponding program After obtaining the PI ...

What's Helm? Helm is the package manager of Kubernetes. Like package management tools such as yum and apt, helm can easily deploy the applications we want with one click. Writing Helm has three main goals: 1. Easily realize "from zero to Kubernetes"; 2. Provide a software package management system similar to the operating syste ...

background I've also built and experienced Elasticsearch 7 X's services and clusters, however, have been running in the Intranet environment at that time, and there is no configuration xpack related to its authentication. I remember the suggestion written at that time: because Elasticsearch does not enable the built-in security defense mechani ...

Experimental environment systemctl stop firewalld 1.journald Service Name: SYSTEMd journal service journalctl Default log storage path: / run/log Experiment 1 usage of journalctl command journalctl -n 3 ## latest 3 entries in log --since "2020-05-01 11:00:00" ## displays the log after 11:00 --until "2020-05-01 11:05:00&quot ...

openvpn version: 2.5.2 Server installation mode: source code compilation and installation Certificate generation method: easy RSA 3 Server configuration Compile and install openvpn source code download address Easy RSA download address # system configuration echo 'net.ipv4.ip_forward = 1' >> /etc/sysctl.conf sysctl -p /etc/sys ...

What is GoAccess GoAccess is an open source, real-time Web log analysis tool running under the command line terminal. The tool provides fast and diverse HTTP status statistics. The analysis results can be viewed through client tools such as XShell, and Html reports can be generated. GitHub address: https://github.com/allinurl/goaccess Offi ...

Follow < buddy (anti fragment mechanism) of Linux kernel (4) > , if there is not enough memory in the migration type specified in the same zone, the fallback mechanism will be started to find suitable other types from the fallbacks array, obtain the steel page, and implement the core processing function of steel page as steel_ suitable_ f ...

user management Users, Group Management Commands Organize: (1 message) Linux users, group management command collation and example details_ captainyuxiaoyu's Blog - CSDN Blog sudo user authorization Privileges to execute commands given to ordinary users by administrators vim /etc/sudoers redhat ALL=(ALL) NOPASSWD: /usr/sbin/useradd Author ...

1, MHA overview MHA (MasterHigh Availability) is a set of excellent software for failover and master-slave replication in MySQL high availability environment. The emergence of MHA is to solve the problem of MySQL single point. During MySQL failover, MHA can automatically complete the failover operation within 0 ~ 30 seconds. MHA can ensure ...

1, Meaning of cluster Cluster, cluster It is composed of multiple hosts, but externally, it is only shown as a whole. It only provides an access portal (domain name or IP), which is equivalent to a mainframe computer. 1. Why do clusters exist In Internet applications, as the site has higher and higher requirements for hardware per ...