[operating system] cognitive framework construction of Linux kernel VFS virtual file system (super_block,inode,dentry,file)
VFS
concept
Virtual file system (also known as virtual file system switch) is the software layer in the kernel, which provides file system interface for user space programs. It also allows different kernel file systems to coexist
"Everything is a file" is one of the basic philosophies of Linux. It is not only an ordinary file, but ...
Posted by summoner on Sat, 30 Apr 2022 09:15:48 +0300
Installing k8s version 1.18.0 in CentOS 7 environment with full record of dashboard interface (command only version)
k8s# 1.18.0 one master and two node s setup commands
catalogue
k8s# 1.18.0 one master and two node s setup commands
1, Environmental requirements (all nodes)
2, Environment system configuration (all nodes)
2.1 turn off the firewall
2.2 close selinux#
2.3 close swap partition#
2.4 host name#
2.5 adding hosts
2.6 deliver bridged IPv4 tr ...
Posted by djKale on Fri, 29 Apr 2022 19:46:14 +0300
Learn the necessary basic operation commands of Liunx
User login
root user
It is a special management account and can also become a super administratorThe root user has full control over the systemThe damage to the system will be unlimitedIn work, if there is no special need, try not to use root Ordinary users
Limited authorityThe damage to the system will be small
terminal
classific ...
Posted by eRott on Fri, 29 Apr 2022 14:55:59 +0300
Ansible learning summary -- Explanation of common ansible modules and playbook examples
1, Ansible installation
Download, install and unzip python 3.7 package
Install wget yum -y install wgetDownload Python file {wget https://www.python.org/ftp/python/3.7.0/Python-3.7.0.tgz (compressed package shall be prepared in advance for offline installation)Unzip the file tar zxvf python-3.7.0 tgzSwitch directory cd Python-3.7.0
Comp ...
Posted by TobyRT on Tue, 26 Apr 2022 22:12:51 +0300
Ansible study notes
Ansible
introduce
Ansible is a new automated operation and maintenance tool. It is developed based on Python and integrates the advantages of many operation and maintenance tools (puppet, cfengine, chef, func, fabric), and realizes functions such as batch system configuration, batch program deployment, and batch running commands. No client. ...
Posted by livvylove on Tue, 26 Apr 2022 21:34:55 +0300
Full record of installing Oracle11g in CentOS7 in 2021
Installing oracle on linux is often used in actual operation and maintenance. Just recently, I reinstalled the system. By the way, I recorded the whole process of installing oracle.
environmental information
Different environments may have small differences, which are similar. To prevent influence, the version information I use is give ...
Posted by ibo on Tue, 26 Apr 2022 01:17:39 +0300
maven private server setup
In this paper macbook pro Build in environment maven Private server, package and deploy the basic code for team members to download temporarily (for a long time, you can apply to the company for a server installation and deployment), so as to increase the reusability of the code and the code specification of team members.
preface
The o ...
Posted by baitubai on Mon, 25 Apr 2022 12:35:04 +0300
Nginx prevents large traffic attacks and restricts traffic access ----------- limit_req_zone module
1, Several algorithms of current limiting
(1) . counter algorithm
It's a little simple and crude to use the counter to limit the number of requests that can pass within one second. For example, the current limiting qps (query rate per second) is 100. The implementation idea of the algorithm is to start timing from the first request. In th ...
Posted by jvquach on Mon, 25 Apr 2022 02:48:03 +0300
Interaction free Shell programming
catalogue
1, Here Document interaction free
1.1 here document overview
1.2 precautions for use of here document
1.3 here document operation
1.3Here Document variable setting
2, Expect
1. expect introduction
2. expect basic command
1, Here Document interaction free
1.1 here document overview
Using I/O redirection to provide a list ...
Posted by suicide-boy on Sun, 24 Apr 2022 18:33:01 +0300
CentOS7 mount the CentOS7 everything installation CD and set the yum source as the mounted CD
CentOS7 mount the CentOS7 everything installation CD and set the yum source as the mounted CD
1, Mount CD
First, you need to put the disc into the optical drive. The device file cdrom under / dev will be used for mounting:
[root@localhost ~]# ls -lh /dev/cdrom
lrwxrwxrwx. 1 root root 3 1 November 23:55 /dev/cdrom -> sr0
Mount command i ...
Posted by dreams4000 on Sun, 24 Apr 2022 01:49:05 +0300