Programmer Think

Known Host Keys Prevent man in the middle attacks. https://www.ssh.com/ssh/host-key#known-host-keys SSH clients store host keys for hosts they have ever connected to. These stored host keys are called known host keys, and the collection is often called known hosts. In OpenSSH, the collection of known host keys is stored in /etc/ssh/known_ ...

Preface Dubbo is a mature and widely used framework.Rao is such that in some extreme cases dubbo-based applications will also have the problem of not being able to reconnect zookeeper.Because this problem is easy to cause relatively large failures, the author has spent a lot of time to locate, and now will write a blog to share the investigatio ...

By Ananias Tsalouchidis Translated by: Meng Wei Original text: https://www.percona.com/blog/2020/01/07/how-securing-mysql-with-tcp-wrappers-can-cause-an-outage/ case Protecting MySQL is always a challenge. There are general best practices for installing reinforcement, but the more complex your settings are, the more likely you are to encou ...

Now let's configure the network card binding in CentOS 7 and run the ip link command to view the available network cards [root@localhost ~]# ip link 1: lo: <LOOPBACK,UP,LOWER_UP> mtu 65536 qdisc noqueue state UNKNOWN mode DEFAULT group default qlen 1000 link/loopback 00:00:00:00:00:00 brd 00:0 ...

  Install openvpn yum install -y epel-release yum install -y openvpn easy-rsa openssl openssl-devel lzo lzo-devel pam pam-devel automake pkgconfig After the above command is executed, there will be a directory of / etc/openvpn, where we usually put configuration files. 1. View the openvpn version: [root@openvpn ~]# openvpn --version |h ...

1. Enter / etc/yum/repos.d / directory (where the configuration files of yum software warehouse are stored) [root@localhost ~]# cd /etc/yum.repos.d/ 2. Delete the original yum source [root@localhost yum.repos.d]# rm -f * 3. Use vim editor to create a new configuration file (the file name is optional, but the suffix must b ...

In recent project requirements, android needs to be able to access the internal and external networks at the same time, that is, different communications go through different networks, and it is feasible to check relevant information, but certain conditions are required 1. Prerequisites: 1) android system version on the cont ...

In daily monitoring, health monitoring is very important for services. Most of its monitoring methods are to monitor service ports and service processes, usually only one of them needs to be monitored. blackbox_exporter is one of the official exporters of Prometheus, which can provide monitoring data collection of http, dns, tcp and icmp Blac ...

Tencent cloud uses the system disk as the default kubelet working directory in / var/lib/kubelet. The system disk is generally not large enough and inconvenient for expansion, so you need to modify the kubelet working directory. The general process is as follows: Preparation Expulsion node Modify configuration Restart service Unseali ...

SpringBoot e-commerce project mall (20k+star) address: https://github.com/macrozheng/mall abstract Spring Cloud Alibaba is dedicated to providing one-stop solutions for microservice development. As one of its core components, Nacos can be used as a registry and configuration center. The usage of Nacos is described in detail in this article. In ...