Reference article: Thanks to Blogger 1
There are three levels of python version control: system level, folder level and pycharm level
First, check the number of python versions installed in the system:
zht@zht0:~$ ls /usr/bin/python*
Posted by pob123 on Thu, 02 Apr 2020 19:34:11 -0700
Download it on the official website Redis -3.2.0.tar.gz, put redis-3.2.0.tar.gz in the / opt directory
xiaoyao@xiaoyao-virtual-machine:/opt$ sudo tar -zxvf redis-3.2.0.tar.gz
xiaoyao@xiaoyao-virtual-machine:/opt$ cd redis-3.2.0/
xiaoyao@xiaoyao-virtual-machine:/opt/redis-3.2.0$ sudo m ...
Posted by hoopplaya4 on Tue, 31 Mar 2020 13:28:41 -0700
In the production environment, the ddl execution of mysql does not affect the normal use of online, and the tool Pt online is often used
Install Pt Online
wget http://www.cpan.org/modules/by-module/DBD/DBI-1.634.tar.gztar -xf DBI-1.634.tar.gzcd DBI-1.634/
perl Makefile.PLmake && sudo make install
Posted by sheac on Sun, 29 Mar 2020 11:44:11 -0700
Author: Liu An
A member of the test team of akesheng, who is mainly responsible for the related test tasks of TXLE open source project, is good at Python automatic test development, and is recently absorbed in the relevant knowledge of Linux performance analysis and optimization.
Source: original contribution
*Aikesheng is produced by the op ...
Posted by alex57 on Tue, 24 Mar 2020 02:54:48 -0700
ECK has not been deployed on the cluster for a long time and has not been officially put into use. Many problems have been found in the trial phase. Now it is about to be formally deployed. I want to upgrade the k8s cluster when it is formally deployed. After reading some data, since my cluster has only one master node, although it is very pow ...
Posted by flash-genie on Sat, 21 Mar 2020 07:14:15 -0700
1, Details of common parametersThis paper is about https://blog.51cto.com/8355320/2471354 The parameter configuration of is extended.The default configuration file of ansible is / etc/ansible/ansible.cfg. Parameters of ansible can be adjusted in the configuration file, including concurrent thread, user, module path, configuration optimization, ...
Posted by hopelessX on Fri, 20 Mar 2020 04:29:59 -0700
Kubernetes 1.17.4 has been officially released, and it can also be upgraded directly for highly available clusters. The quick upgrade (including the quick download link of domestic image) includes three main steps: upgrading the kubeadm/kubectl/kubelet version, pulling the image, and upgrading the kubernetes cluster. Reference The software lock ...
Posted by jonah on Wed, 18 Mar 2020 09:28:32 -0700
Ansible's specified user and password login, secret-free login, specified ssh port, and host list Inventory configuration
It is not necessary to modify the ansible configuration in practice, or it is only necessary to modify the ansible configuration.
Add user account
1. Login accounts used by operations and maintenance personnel;
Posted by artist-ink on Sun, 15 Mar 2020 09:06:45 -0700
tcpdump is a necessary tool in debugging network communication program. tcpdump is very powerful, you can see every detail of network communication. For example, TCP can see 3 handshakes, PUSH/ACK data push, close 4 waves, all details. Including the number of bytes and time of each network packet reception.
The simplest exa ...
Posted by johnrcornell on Sat, 14 Mar 2020 01:03:59 -0700
1, Last course review
2, Linux basic command 3
2.1 users and user groups
2.2. Use of personal environment variables (. Selection of bashrc and. Bash? Profile) and global environment variables (/ etc/profile) and aliases
2.3 use of history command
2.4 use of delete command
1, Last cour ...
Posted by Arsench on Thu, 12 Mar 2020 03:15:32 -0700