CentOS 7 installs Python 3.6, pip3 error problem

After installing Python 3.6.3 on CentOS 7, the following errors occurred when using the pip command Traceback (most recent call last): File "/usr/Python3.6.3/lib/python3.6/site-packages/pip/basecommand.py", line 215, in main status = self.run(options, args) File "/usr/Python3.6.3/lib/python3.6/site-packages/pip/commands/search.py", l ...

Posted on Mon, 13 Jul 2020 12:30:51 -0400 by ionik

GMSSLGMSSL double certificate generation for novice

First of all, I'm not a professional in cryptography. I don't have the knowledge base in this area. This blog and the next blog are all based on the materials and blogs I can find on the Internet. I've explored and summed them up a little bit. I asked many predecessors and bloggers, but I didn't see ...

Posted on Wed, 24 Jun 2020 00:00:29 -0400 by Xyox

SM2 encryption and decryption algorithm (based on GMSSL C code implementation) [non original, record it]

1, Elliptic curve cryptography Elliptic curve: it is a kind of bivariate polynomial equation whose solution forms an elliptic curve. Elliptic curve parameter: defines a unique elliptic curve. Two parameters g (base point) and n (order) are introduced. G point (xG, yG) is the base point on the elliptic c ...

Posted on Sat, 20 Jun 2020 04:22:35 -0400 by rane500

Centos7 install apache server

Official website address: http://httpd.apache.org/ , take version 2.4.43 as an example Click Download to enter the relevant Download pageHere's another way to download: wget Download First we download dependency yum groupinstall "Development Tools" -y yum install libtool -y yum install expat-devel pcr ...

Posted on Thu, 11 Jun 2020 04:18:17 -0400 by knight

A complete manual for beginners to build ngrok

With all due respect, programmers who can't even be lazy are really tired~ Some time ago, WeChat official account was developed. WeChat official account was required to configure public domain name. The local ones don't work. Set up the ngrok little white manual Mapping local services to the public n ...

Posted on Tue, 09 Jun 2020 00:40:28 -0400 by intercampus

Three methods of generating high strength passwords

Now information disclosure is more and more serious, and a strong password is the first step to prevent the disclosure of personal sensitive information. Liang Xu once shared an article about how to judge whether your password is secure enough. Click the following link to check: In the era of information disclosure, how to make your password mo ...

Posted on Thu, 04 Jun 2020 09:32:18 -0400 by gamblor01

How to Build Rtmp Service and Develop Live APP with uni-app

Preface: Because you have an IM application, you decide to add live and short video capabilities in order to improve it.There are currently two ways to do live broadcasting, one is to directly connect with the third party's live service products, the other is to develop the services themselves.So here are also two ways to recommend simple impl ...

Posted on Tue, 19 May 2020 13:06:49 -0400 by stevebrett

How to optimize Tomcat performance in high concurrency environment? You will understand after reading it!

Yunqi information:[ Click to see more industry information]Here you can find the first-hand cloud information of different industries. What are you waiting for? Come on! As the most commonly used Java Web server, Tomcat's performance will drop sharply with the increasing concurrency. Is there any way to optimize the performance of Tomcat ...

Posted on Sat, 09 May 2020 04:21:50 -0400 by bstruss

Build a proxy server with stunnel+squid

1, Network environment Host A: 192.168.0.11 Host B: 66.0.0.6 Host C: 4.2.2.2 Host A and host B communicate with each other, and host B and host C communicate with each other. If A accesses C network slowly or not, it can be accessed through stunnel+squid agent. 2, squid installation configuration Squid and stunnel can be c ...

Posted on Sat, 02 May 2020 17:22:49 -0400 by karq

Record the pit encountered in the first integrated ios push

testing environment OSX Certificate generation There are many tutorials in this part. There are basically no holes. I just skipped them Try to connect function send(){ $deviceToken = 'xx='; $ctx = stream_context_create(); // ck.pem is your certificate file stream_context_set_option($ctx, 'ssl', 'local_cert', '/cert/ ...

Posted on Fri, 01 May 2020 23:59:18 -0400 by BlueNosE