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catalogue 1 miscellaneous character device Core structure Operation function Miscellaneous character device registration application 2 early classic registration Operation function Classic device registration application 3 Linux2.6 character device Core structure Operation function Linux2.6 device registration application Linux sys ...

Install JDK Download Oracle JDK https://www.oracle.com/java/technologies/javase-jdk14-downloads.html 1. Decompress tar -xvf jdk-14.0.2_linux-x64_bin.tar.gz 2. Configuration file vim /etc/profile Add the following in the last line export JAVA_HOME=/usr/local/jdk/jdk-14.0.2 export PATH=$JAVA_HOME/bin:$PATH export CLASSPATH=.:$JAVA ...

I wrote a manual about installing ROS 2E under Ubuntu 20.04 before. I'm going to use Moveit2 recently. I found that I still need to upgrade to Fox Fitzroy. I've seen that the latest one has arrived at Galactic Geochelone, so I'll record the process of installing ROS 2 Galactic Geochelone under Ubuntu 20.04. Because there are many holes in th ...

Experiment of deploying LVS-DR mode with ENSP simulator and Linux topology environment The customer's private network IP is 192.168.10.6/24. The gateway points to the cell exit router, which is configured with SNAT conversion. OSPF is simulated between the whole backbone network to obtain the whole network route, and the private network ad ...

1 Hadoop overview 1.1 what is Hadoop (1) Hadoop is a distributed system infrastructure developed by the Apache foundation (2) It mainly solves the problems of massive data storage and massive data analysis and calculation (3) In a broad sense, Hadoop usually refers to a broader concept - Hadoop ecosystem 1.2 Hadoop advantages (1) High ...

Dynamic link library What is dynamic link library The following is my own understanding, which may not be correct, but it should be roughly the same Long ago, without the concept of library, every time I wrote code, I was building wheels from scratch Later, people found that some functions are common to most programs and have nothing to do w ...

1. Install gcc environment yum install gcc-c++ 2. Install two libraries The first libevent Library yum -y install libevent The second libfastcommon Library libfastcommon download address: https://github.com/happyfish100/libfastcommon/archive/V1.0.43.tar.gz Copy the downloaded libfastcommon to the / usr/local / directory, and then execute ...

1. Check whether the disk supports online capacity expansion https://help.aliyun.com/document_detail/113316.html 2. Create snapshot from cloud disk 3. Online capacity expansion purchase 4. Log in to the server to view the disk status # View cloud disk partition [root@middleware ~]# fdisk -l Disk /dev/vda: 200 GiB, 214748364800 bytes, 419 ...

Summary of Linux polkit rights raising As soon as I was about to take my annual leave, I received a regulatory vulnerability alert - "pkexec program in Linux Polkit has a privilege escalation vulnerability (vulnerability number: CVE-2021-4034). Pkexec application is a pre installed tool for Linux system, and the vulnerability affects main ...

*** * this article aims to record the experimental report and implementation process of pintos project1, the course design of operating system at the end of this semester. The whole experiment refers to many articles and some codes. Some of them are the same as other articles. Please forgive me. At the same time, it is also to test the article ...