ssh is named secure shell, the current version number is 2, and the port number used is port 22 of tcp, which can achieve secure remote login. ssh protocol version has v1 version and v2 version: v1 is based on CRC-32 to do MAC, which is not safe and can not prevent middlemen ***. V2 version host protocol chooses secure MAC mode ...
Posted on Sun, 05 May 2019 09:24:37 -0700 by chriscloyd
In the test, you need to send data through Netcat.
Configuration environment: CentOS 6.8
1. Download the installation package to the specified directory, e.g. the blogger is: /opt/software/
2. Unzip the file to the specified directory (note: cre ...
Posted on Sat, 04 May 2019 08:10:38 -0700 by Soccerplayer1316
The most detailed linux grep command tutorial
grep (global search regular expression(RE) and print out the line, which comprehensively searches for regular expressions and prints out rows) is a powerful text search tool that uses regular expressions to search for text and print out matching rows.
The grep family of Unix incl ...
Posted on Fri, 03 May 2019 20:10:38 -0700 by myys
I believe you have heard about thread pool all the time, but you don't necessarily know what it is and how it is realized.
1.1 Why use thread pools?
Because of the high cost of creating and destroying threads, it is too late to create threads for processing large amounts of tasks per unit time.
The number of threads can be controll ...
Posted on Fri, 03 May 2019 16:50:38 -0700 by mrobertson
I. Cluster Planning
Implement master high availability and load balancing
Posted on Wed, 01 May 2019 18:20:36 -0700 by samdennis
php preview the implementation of word documents and pits encountered in the implementation process
During the course design of software engineering, our group chose to make a data-sharing website. Of course, the most important function of the website is to upload files and download files.But this requires a more important process: preview.
Posted on Wed, 01 May 2019 10:10:36 -0700 by punky79
PXE System Automation Installation --- Summary of Seven Weeks'Contents
Using PXE to Realize Automatic Installation System
Network Card: Host Only, Close vmware's dhcp Service
Install http software
yum install httpd
Start the service and set it to boot from scratch
systemctl start httpd
systemctl enable httpd ...
Posted on Mon, 29 Apr 2019 08:30:36 -0700 by scottrad
Configuration file details:
1. Main configuration file: / etc/asiable/ansiable.cfg
module_name =command ##The default module of ansible is command module, but it has some limitations when it is used. It is suggested to change to shell module.
host_key_checking = False ##Check the host_key corresponding to the host to be contro ...
Posted on Sat, 27 Apr 2019 20:30:35 -0700 by mindfield
Sometimes we have to deal with a system that someone else has used or with a newly installed system.For security and other reasons, the system is in a minimal installation state or selectively installs packages.Some of the commonly used tool commands are not installed.Many people's ways (including my previous ones) search for answers through s ...
Posted on Sat, 27 Apr 2019 12:36:34 -0700 by scald
I. File and Catalog Classes
1.1 File exist file already exists
[root@oldboyedu59 ~]# mkdir /data /lidao [root@oldboyedu59 ~]# mkdir /data /lidao mkdir: cannot create directory ‘/data’: File existsmkdir: cannot create directory ‘/lidao’: File exists
Cannot create directory because it already exists
1.2 No such file or directory does ...
Posted on Fri, 26 Apr 2019 13:36:34 -0700 by Lassie