Install and Secure Redis on CentOS 7

 

Redis Installation

Add the EPEL repository, and update YUM

 

Install Redis

 

Start Redis and setup automatically start Redis on boot

 

Verify the Installation

If Redis is running, it will return: PONG

 

Redis Configuration

Password settings

find and uncomment the requirepass line in the configuration file, and replace master_password with a secure password

 

Firewall settings

 

Local Benchmark Test

 

Check Redis Version

 

Setup PHP session to Redis

 

 

How to fix MySQL connection error: Authentication plugin ‘caching_sha2_password’ cannot be loaded: dlopen(/usr/local/mysql/lib/plugin/caching_sha2_password.so, 2): image not found

The problem is some MySQL clients not yet support new password encryption method.

 

Just change the user password encryption back to legacy version, then problem will be fixed.

The following SQL update specific user to legacy encryption:

 

Also, you can change the default authentication plugin to legacy version.

Update /etc/my.cnf and add the following line after [mysqld]:

 

 

Install wkhtmltopdf & wkhtmltoimage to CentOS with Chinese & Asian fonts support

Install dependencies

 

Install wkhtmltopdf and wkhtmltoimage

p.s. you can find more versions in the following link:

https://github.com/wkhtmltopdf/wkhtmltopdf/releases

 

Install  Chinese & Asian fonts support

 

References

https://wkhtmltopdf.org/

Add swap to CentOS without reboot

Add 4G swap

 

How to encrypt and decrypt .cpt file

What is .cpt extension?

.cpt is a encrypted file format, you can use ccrypt to create and decrypt .cpt file

 

How to encrypt and decrypt .cpt file

Encrypt a file

Decrypt a file.

 

How to install ccrypt

Install ccrypt on CentOS

Install ccrypt on Debian/Ubuntu

 

Install MySQL-Python (MySQLdb) on macOS

MySQLdb is an thread-compatible interface to the popular MySQL database server that provides the Python database API.

Standard Installation

 

EnvironmentError: mysql_config not found

You need install mysql and link, before install MySQL-Python