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1. What is a terminal In short, it is something that can accept input and display (output) results. Terminal is the most important man-machine interface of computer system.Corresponding program file of desktop terminal (pseudo terminal) of CentOS / usr / bin / Gnome terminal 2. console and Terminal In the early days, the physical I / O devic ...

Finding a virtual address by traversing the page table and mapping the corresponding physical memory is a very common operation, so the whole walk traversal process should take as little time as possible. show_pte() With show_ The PTE () function is taken as an example to illustrate how to obtain the physical page conversion process according ...

Function [#]( ) Ensure complete data transmission Redis distributed lock implementation source code explanation [#]( ) Graphic explanation [#]( ) Step [#]( ) Distributed locks meet two conditions: one is the lock with effective time, and the other is high-performance unlockingredis commands setnx (set if not exist) and setex (set exp ...

In my blog website, Nacos is used as the configuration and registration center and associated with the database. Since the data, data and website settings are stored in the database, I always want to make a backup. So I found a relatively simple scheduled backup mode. Of course, it is based on linux. Method: use the timer in linux system to ...

1, Centos6 X version of yum image installation 1. If you are using a simplified version of CentOS, you need to install yum first Note: if you have no problem with yum, please skip this step to install Yum by yourself 2. If there is a problem with yum, you need to execute these five lines of commands Note: five lines of commands, five steps ...

catalogue 1, Foreword 1. Introduction to moosefs 2. Characteristics of moosefs (1) Tomographic structure (directory tree) (2) Store file properties (permissions, access, and modification time) (3) Support special files (block device, character device, pipeline) (4) Symbolic link (5) Access to the file system can be restricted by IP addr ...

1, What is ELK Generally speaking, ELK is a combination of three open-source software * * Elasticsearch (log storage and search), Logstash (log collection) and Kibana (log viewing), which can complete more powerful user query, sorting and statistical requirements * *. ELK is also known as ELKstack. The official domain name is elastic.co. The ...

Linux Distribution Linus towaz's Linux is just a kernel. Kernel refers to a system software that provides functions such as device driver, file system, process management and network communication. The kernel is not a complete operating system, it is only the core of the operating system. Some organizations or manufacturers package the Linux ...

Configure Docker environment of ROS target Configure two independent Docker environments, ROS1 and ROS2 GUI applications in the ros docker container on the local display server, such as rqt, rviz, etc From the local, you can directly ssh log in to the ROS container of the server Mount a directory of the server into the container to facil ...

reference resources: https://blog.csdn.net/u012319493/article/details/85331567 Accessing disk based files is a complex activity, which involves not only the processing of VFS abstraction layer and block devices, but also the use of disk cache. The ordinary files and block device files of the disk file system are simply collectively referred to ...