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Deployment of PXE brief introduction What is PXE? 1. PXE is the abbreviation of Preboot Execution Environment, which is called Preboot Execution Environment. 2. A network protocol designed by Intel enables the computer to start the installation system through the network. 3. It is a mechanism to start a computer with network interface, which d ...

From: https://blog.csdn.net/ashi198866/article/details/46725813 The logging library provides two class es for log scrolling (refer to https://docs.python.org/2/library/logging.handlers.html), one is Rotating FileHandler, which scrolls mainly according to the size of the log file, and the other is TimeRotating FileHandler, which scrolls mainly ...

I. Two nonsense sentences In the cloud data center, when dozens or even hundreds of servers are online at a time, the system installation will become very cumbersome. After the system is installed, many configurations will be involved. If one server is installed, the workload will be very large. (It's a joke, though there's overtime pay)To s ...

If you are not familiar with rsync services and commands, you can refer to the blog post. Remote synchronization through rsyncThere's not much to say here! Linux kernel has provided inotify notification interface since version 2.6.13 to monitor various changes of file system, such as file access, deletion, movement, modification, etc. Using th ...

Articles Catalogue Introduction to Ansible roles roles directory structure Create roles Give an example Use roles to install and open httpd services for the host, and add httpd to the firewall list haproxy deployment (load balancing) Implementation of keeping alive + haproxy high availability ...

When we have only one server, two servers and several servers, we deploy software tools to log on to the server one by one, but as the number of enterprise servers not only increases, it is obvious that the deployment of logon by one has become unrealistic. At this time, the automated operation and maintenance management tools came on the scen ...

Text Processing Tools 1,cut -d Specifies the separator.For example, -d: -d'' -f Specifies which column to choose.For example, -f1,3 --output-delimiter specifies the separator to display Tr-s compression-d deletion-c except 2. Percentage of disks fetched using tr and cut [root@glowing-bliss-1 data]# df -h | tr -s ' ' | cut -d' ' -f5 | tr -dc ...

View jps[root@master ~]# jps 7445 Jps If this happens, you can move on to the next step. If not, please refer to jdk environment construction Import the Hadoop package and place it in the / opt directory Check if the Hadoop package is imported [root@master ~]# cd /opt [root@master opt]# ll total 4 ...

nginx is deployed by source code compilation through ansible-playbook. All deployed nginx hosts are divided into webserver groups: # vim /etc/ansible/hosts [webserver] 192.168.30.128 192.168.30.129 192.168.30.130   Create a management directory: # mkdir -p nginx/roles/nginx_install/{files,ha ...

1. Basic knowledge: Group replication model: Single master model: automatically elect a master node from many MySQL nodes in the replication group, only the master node can write, and other nodes Automatically set to read only Multi-master model: Any node in the replication group can be ...