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edit Win / Linux Mac Notes Frequency of use Ctrl + Space ⌃Space Code auto-completion (usually conflicts with input method) ★☆☆☆☆ Ctrl + Shift + Enter ⌘ ⇧ ↩ Intelligent code completion (such as: if ()) ★☆☆☆☆ Ctrl...

Commonly used terminals on Mac are terminal and iterm. In many cases, we need to modify the host name displayed in these terminals. As shown in the figure above, we use the command hostname to view the current host name From the results we...

Adding and removing users on a Linux system is one of the most important system administration tasks we need to be familiar with. When a new system is created, usually only the root account is accessible by default. While running as the roo...

Let's Encrypt is a Certificate Authority (CA) that provides an easy way to obtain and install free TLS/SSL certificates, enabling encrypted HTTPS on your web server. It simplifies the process by providing a software client, Certbot, which a...

Nginx is one of the most popular web servers in the world, responsible for hosting some of the largest and most trafficked sites on the Internet. It is a lightweight application software that can be used as a web server or a reverse proxy....

Generally, the configuration files of supervisor are /etc/supervisord.conf . The directory where tasks are stored is /etc/supervisord.d , and you can create a new file named yourname.ini under this directory. Each .ini file is a task, and w...

The following task names are represented goserver by In Supervisor, shutting down a task is very simple. $ supervisorctl stop goserver Just execute the above command to close the task you want to close. However, here comes the problem. As w...

You can use yum to install it under Linux $ yum install supervisor After installation, add the startup $ systemctl enable supervisord Finally, start the supervisor service $ systemctl start supervisord...

Usually, centos system comes with man commands, which can be used to view the details of commonly used commands. However, sometimes we need to view some functions, and using only the default man functions cannot meet the needs. At this time...

Screen is a software used for switching between command line terminals. Let's take an example to illustrate the function of screen. For example: When remotely connecting to a server, a terminal is opened using ssh. I need to execute a long...

Problem 1: Android cannot send network requests There was a problem when cordova was packaging Android. After packaging, it was impossible to send a request (whether it was http or https). In the end, I had to delete the original project an...

On a Mac, you may encounter the following error when using gdb for the first time: (gdb) run Starting program: /usr/ local /bin/order_monitor Unable to find Mach task port for process-id 26551: (os/kern) failure (0x5). (please check gdb is...

The xargs command is also a member of the pipeline command. The function of the xargs command is simply to replace parameters. So what is parameter replacement? First, we need to understand the concept of pipelines. In the section on Linux...

Linux classic practice - log filtering Let's talk about the problem first. Count the number of IP addresses in a log file after deduplication. In fact, this is a very common and relatively simple problem. I personally think that the most im...

1. Add a rule to allow access to a port $ iptables -A INPUT -p tcp --dport 3005 -j ACCEPT Add a rule and append a rule to the INPUT chain to allow access to port 3005. The rules added in this way are only temporarily saved in the memory and...