Linux counts the number of occurrences of a character in a file
In Linux, you can use the command line tools "grep" and "wc" to count the number of occurrences in the file
Linux
Linux counts the number of requests for a certain port
netstat -an will print the current network link status of the system
Centos7 upgrade kernel
Application background: I have recently contacted docker, which requires a higher kernel version. Even the default kernel version of centos7.x currently in use is 3.10.0-xxx, which just meets its minimum requirements.
Basic operation of getting started with Vim
Vim is a popular lightweight and powerful text editor on Linux systems. I use Vim mainly for quick editing of small files, such as configuration files or script files, but it can of course be used for any text editing. This is a beginner’s guide, just scratching the surface of Vim
How to install Node.js and NPM on Ubuntu
Node.js is an open source JavaScript runtime environment on Chrome V8, allowing you to easily develop fast and scalable web applications
Linux nohup in detail
When we execute a command in Linux, it will create our process in the background and assign a unique process ID. This process can be ended in three ways: the assigned task is completed, you explicitly terminate the process, you log out, or in the case of SSH, the connection is disconnected and the session is terminated
Linux system DNS error resolution
CentOS, Euleros series operating systems: ping the public network domain name fails, prompting Name or service not known, but you can ping the elastic public network IP, CURL is the same
Docker Bridge container cannot access the external network
Ping pass cannot be accessed (curl)
Linux modify Docker Storage Driver
overlay2 requires high-core support, and low-core use overlay
Linux one command counts Nginx access IP
Count IP access from Nginx logs