Create a simple APT warehouse Quickly build a simple APT warehouse
As part of my job, the PATHspider I maintain relies on some functionality in cURL and PycURL that has just been merged or is still waiting to be merged. I need to build a Docker container containing these Debian packages, so I need to quickly build an APT repository. The Debian repository is essentially a static website, and the content is GPG signed, so it doesn't necessarily need to be hosted somewhere trustworthy (unless availability is critical to your application). I host my blog on Netlify (a static website host) which I think would be a good fit for this situation. They also support open source projects. You can install netlif with the following command
Apr 21, 2024 am 09:04 AM
vim bug in Debian
I've been wondering why vim on my server behaves so stupidly when it comes to the mouse: it can't jump, copy, and paste like usual. Although it is already set in /etc/vim/vimrc.local. setmouse=Finally I figured out why, thanks to bug#864074 and fixed it. The reason is that when there is no ~/.vimrc, vim loads defaults.vim after vimrc.local, thus overriding several settings. There is a comment in /etc/vim/vimrc (although I don't see it) that explains this: "Vimwillload$VIMRUNTIME/defaults.
Apr 20, 2024 am 09:04 AM
ORB-SLAM2 Beginner's Notes
The system contains modules common to all SLAM systems: 1. Tracking, 2. Mapping, 3. Relocalization, and 4. Loopclosing. The key points are as follows: ORB-SLAM is mainly divided into three threads Progress: The three threads of Tracking, LocalMapping and LoopClosing are stored in corresponding three files, namely Tracking.cpp, LocalMapping.cpp and LoopClosing.cpp files. (1) The main work of this part of tracking is to extract ORB features from the image.
Apr 19, 2024 pm 09:22 PM
Quickly set up Linux operating system and Oracle database
Preparation work: 1. Download and install Oracle's virtual machine software -VirtualBox: Here 2. Download OraclePre-BuiltDeveloperVMs (forOracleVMVirtualBox):Here. Find DatabaseAppDevelopmentVM in the Pre-BuiltVM page. This virtual machine template has built-in OracleLinux and many Oracle database development related software, and you can get started with almost no configuration. Let’s take a look at the software list: OracleLinux6.5OracleDatabase12cRele
Apr 19, 2024 am 09:25 AM
Install python3 under Linux CentOS7
Under CentOS7, python2.7 is installed by default. Now I will teach you how to install python3: 1. First install the dependencies that may be used by python3.6 #yum-yinstallopenssl-develbzip2-develexpat-develgdbm-develreadline-develzlib-devel2. Download Python source code package, the address is https://www.python.org/downloads/source/, and then upload it through xftp, or directly use the wget command, wgethttps://www.
Apr 18, 2024 pm 12:20 PM
Ideas to solve the problem that Xshell cannot connect to the virtual machine
The first time I used xshell, I couldn't connect to Linux. I tried it for a long time and searched many solutions, but finally I solved it. Here I will share my own solution and list the solutions on the Internet. I hope it can help others. . 1. Your linuxip address is not configured. The ip address is not configured. You need to configure it yourself. There are many configuration methods on the Internet. Here is one: enter the vim/etc/sysconfig/network-scripts/ifcfg-eth0 command to change the content of this file to the following: Set the ip yourself, for example It is: 192.168.1.155 and then enter ifconfig-a to find your own IP and change it. 2Change yourself
Apr 17, 2024 am 09:01 AM
Build a Git server under CentOS
1. First, you need to install Git. You can use the yum source to install it online: [root@localhostDesktop]#yuminstall-ygit2. Create a git user to run the git service addusergit3. Initialize the git warehouse: Here we choose /data/git/learngit. git as our git repository [root@localhostgit]#gitinit--barelearngit.gitInitializedemptyGitrepositoryin/data/git/learngit.git/ execute the above command
Apr 15, 2024 pm 07:13 PM
How to install postfix and set up sasl on CentOS6
1. CentOS6 has postfix installed by default. If the system does not have postfix, you can use the following command to install it. [root@mail~]#yum-yinstallpostfix2. Configure the main.cf of postfix, and configure smtp-auth to use the sasl function of dovecot. [root@mail~]#vi/etc/postfix/main.cf#Line 75: Remove the comment and set the host name. myhostname=mail.opsky.top#Line 83: Remove the comment and set the domain name. mydomain=opsky.top#Line 99: Remove the comment.
Apr 15, 2024 pm 02:30 PM
Detailed explanation of the double type in C++ and how to retain three decimal points
We know that in C language, if the output result is required to retain three decimal places, we can use the pritf() function to easily solve the problem. But C++’s output operator
Apr 15, 2024 am 11:25 AM
How to create custom monitoring items with zabbix
Background: Zabbix itself provides many optional monitoring items, which can meet most monitoring needs. Sometimes due to business needs, monitoring items need to be customized. The following takes creating a MySQL custom monitoring item as an example to share how to create a Zabbix custom monitoring item. Environment description: zabbix version: 3.0.3 Operating system: CentOS7 mysql version: 5.7.1 Implementation steps: 1. Modify zabbix_agentd.conf and add zabbix_agent configuration directory. The following is the configuration of my local zabbix: remove the comments from the following lines# Include=/usr/local/etc/zabbix_agentd.c
Apr 14, 2024 pm 09:01 PM
A comprehensive list of visual SLAM solutions
MoNoSLAM uses the extended Kalman filter as the backend, tracks the very sparse feature points on the front end, uses the current state of the camera and all landmark points as state quantities, and updates its mean and covariance. Advantages: In 2007, with the improvement of computer performance and the system's sparse way of processing images, this solution enabled the SLAM system to run online. (Previous SLAM systems basically could not run online, and could only rely on robots to carry data collected by cameras, and then perform positioning and mapping offline.) Disadvantages: MoNoSLAM has narrow application scenarios, a limited number of road signs, and coefficient feature points are easily lost, etc. Disadvantage, its development has now been stopped. PTAM(ParallelTrackingAndMappi
Apr 14, 2024 pm 01:31 PM
How to deploy CSVN server on CentOS6.7
Server required components: Minimal installation is acceptable (personal test), additional required components: jdk-8u91-linux-x64.gz, CollabNetSubversionEdge-5.1.4_linux-x86_64.tar.gzCollabNetSubversionEdge-5.1.4_linux-x86_64.tar.gzCollabNetSubversionEdge- 5.1.4_linux-x86_64.tar.gzstep1: Upload these two software packages to the /opt directory of the server and install jdk1.8tarzxvfjdk-8u91-l
Apr 14, 2024 am 09:43 AM
Implementing the apple and bug problem using C++
Recently, I was tutoring children for the Olympiad Mathematical Olympiad class. I read a few questions and thought it would be more focused to write them down. Let’s sort them out. Hahaha. The problem is as follows: Apples and worms: You bought a box of n apples. Unfortunately, a worm was mixed into the box when you finished buying. The worm can eat one apple every x hours. Assume that the worm eats one apple. If you won't eat another one before, how many whole good apples do you have after y hours? Sample input: 1049 (meaning a box of 10 apples, eat one in 4 hours, how many will be complete after 9 hours?) Sample output: 7 Code implementation: Note that it is rounded up, and the default is down Rounded. The code is as follows: #include#includeusingnamespacestd;/*
Apr 14, 2024 am 09:20 AM
How to use the sed command tool
sed Usage Using sed can realize most of the functions of grep, and it can also search and replace. Syntax: sed[options]'command'filenamesed[options]-fscriptfilefilenameOptions: -n: The -n option is used with the p command to indicate printing -e: Equivalent to --expression, multi-point editing, used to execute multiple commands on one line sed implements matching (grep) function = prints lines with root string [root@cham2sed]#sed-n'/root/'ptest.txtroot:x:0:0:root:/root:/b
Apr 13, 2024 pm 01:40 PM
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