Programmer Think

abstract The commodity search function in the mall project has never done real-time data synchronization. Recently, it was found that Alibaba's open source canal can synchronize the data in MySQL to Elasticsearch in real time, which can well solve the problem of data synchronization. Today, let's talk about the use of canal, hoping to help ...

Meaning of different file colors Color modification:[root@fyr ~]# ls --color=no / / turn off color [root@fyr ~]# ls --color=yes / / open color Black: ordinary file (e.g. txt)Blue: folderSky blue: linked filesGreen: executableRed: compressed fileYellow: block device files (e.g. hard disk, U SB flash disk) Expansion: -Ordinary ...

1, Virtual environment 1. Download conda (skip if conda already exists) wget -c https://repo.continuum.io/miniconda/Miniconda3-latest-Linux-x86_64.sh 2. Add permissions chmod 777 Miniconda3-latest-Linux-x86_64.sh 3. Operation sh Miniconda3-latest-Linux-x86_64.sh (1) There will be two prompts in the middle. Press enter for the first on ...

catalogue 1, Linux Application Foundation 1. Relationship between application program and system command  2. Common package encapsulation types 2, RPM package management tool 1.Red-  Hat Package Manager 2.RPM software package 3.rpm command function 4. Query RPM package information 5. Install, upgrade and uninstall RPM software pac ...

summary This paper mainly introduces the common Linux kernel parameters and the treatment of related problems. View and modify Linux instance kernel parameters Starting from the actual needs, try to have the support of relevant data, and it is not recommended to adjust the kernel parameters at will.To understand the specific functions of ...

catalogue 1. Document processing command 1.1 # directory processing 1.2 document processing 1.3 link handling 2. Permission management command 2.1 change authority 2.2 # change of ownership 3. File search command 4. Help command 5. User management commands 6. Compression and decompression command 7. Network command 8. Shutdown and ...

Python - implement file downloader Supplementary knowledge points tcp servers generally need to be bound, otherwise the client cannot find the servertcp clients are generally not bound, because they send out the linked server, so as long as the ip, port and other information of the server is determined, the local client can be randomly connec ...

1. Install redis for Ubuntu / CentOS (redis5.0.8 does not need to update gcc) https://blog.csdn.net/qq_34246965/article/details/115269542 2. Start redis service and verify If it is in the bin directory under the redis file, the command: redis-server /etc/redis/redis.conf # start redis service If it is in the redis file /bin/redis-server /et ...

preface MySQL is generally installed in three ways: binary version, compiled version and RPM package. The more common is the binary version installation, which is convenient and simple. Compared with the compilation and installation, if it does not pursue the ultimate performance, it is not very different in use. This tutorial takes the binary ...

Preface: This post is a rough summary of the class notes and my own insights from Mr. Wei Dongshan's linux kernel tutorial. If you want to know more about linux kernel, please detour. There are many contents in the linux startup process. This paper only briefly analyzes the kernel startup process. The assembly code initialization process is ...