"Python" CentOs7 Python3 installing OpenSSL and resolving SSL issues

I. Installation of OpenSSL

1. Download the compressed package on the root directory

wget http://www.openssl.org/source/openssl-1.0.2j.tar.gz

2, under the folder decompression, get openssl-1.0.2j folder

Tar-xzf openssl-1.0.2j.tar.gz

3. Enter the extracted directory:

CD openssl-1.0.2j

4, set the OpenSSL installation, (--prefix) parameters for the installation of the directory, that is, the installed files will appear in this directory:

./config--prefix=/usr/local/openssl

5. Execution of Orders

./config-t

6. Execute make to compile OpenSSL

Make

Here if the following error occurs

MAKE[1]: Gcc:command not found

Surf the internet to find out I installed the CentOS7 in the GCC compiler

Ensure the system network is unblocked, execute command yum-y install GCC installation gcc

7. Installing OPENSSL:

Make install

8. View version

OpenSSL version

Second, install Python3.6.4 and solve SSL problem

1, the installation python3.6 may use the dependence

Yum install openssl-devel bzip2-devel expat-devel gdbm-devel readline-devel sqlite-devel gcc gcc-c++  openssl-devel

2, to the Python website to find the download path, download with wget

wget https://www.python.org/ftp/python/3.6.5/Python-3.6.5.tgz

3 Unpacking the TGZ package

TAR-XF python-3.6.5.tgz

4 Entering the Python directory

cd/python-3.6.5/

5, compile, install

　　5.1 Hint that the SSL module could not be found

　　After the Python installation is complete, you are prompted not to find the SSL module:

Import # if we can ' t import it, let the error propagate Importerror:no module named _ssl

5.2 Recompile Python (minus the last 4 lines of comments)

# Modify the Setup file under the Modules folder under the Unzip folder Setup.distvim modules/setup.dist# The results are as follows: Remove the last 4 lines of comments, Get the following result #  Socket Module Helper for socket (2)_socket socketmodule.c timemodule.c#  Socket Module helper for SSL support; must comment out the "other" socket line above D possibly edit the SSL variable:ssl=/usr/local/-duse_ssl-i$ (SSL)/include-i$ (SSL)/include/  -l$ (SSL)/lib-lssl-lcrypto

5.3 Compiling the installation

#这里要先把目录切回到解压文件夹下
./configure--prefix=/usr/local/python3makemake Install

5.4 Test, ready for normal use

[[Email protected] ~]#pythonPython 3.6.4 (default, May 28 2018, 23:45:10) [GCC4.1.2 20080704 (Red Hat 4.1.2-54)] on Linux2type" Help","Copyright","credits" or "License"  forMore information.>>>ImportSSL>>>

Note: If you want to keep the old version, you do not need to do 6.72

6. Rename the old version of Python dependency

Ll/usr/bin |  /usr/bin/python/usr/bin/python2.7

7. Delete the old soft link and create a new soft link to the latest Python

rm-rf/usr/bin/-s/usr/local/bin/python3.6/usr/bin/-V

Use the Yum command to error file "/usr/bin/yum", line except Keyboardinterrupt, E:
The problem occurs because:

Yum package management is written using python2.x, and after upgrading python2.x to python3.1.3, the problem occurs due to Python version syntax compatibility
Workaround:
Modify the Yum configuration file to point the Python version to the previous old version

# Vi/usr/bin/yum # !/usr/bin/python2.7

Modify the Urlgrabber-ext-down file to change the Python version

# Vi/usr/libexec/urlgrabber-ext-down # !/usr/bin/python2.7

Adding environment variables

Vim ~/.bash_profile

Add the following parameter

Export Path=/usr/local/python/bin: $PATH

Save
SOURCE ~/.bash_profile

Execute the script as follows:

Vim install_python.sh

#!/bin/BashEcho "Installing related Components"Yum Install-Y Openssl-develbzip2-devel expat-devel gdbm-devel readline-devel sqlite-develGCC-c++GCCopenssl-develEcho "Download the installation package"wgetHttps//www.python.org/ftp/python/3.6.5/Python-3.6.5.tgzEcho "Unpacking the installation package"Tar-XF python-3.6.5. tgz-c/root/&& cd/root/python-3.6.5/Echo "Add SSL Support"Cat>>/root/python-3.6.5/modules/setup.dist <<"EOF"_socket Socketmodule.cssl=/usr/local/Ssl_ssl _ssl.c-duse_ssl-i$ (SSL)/include-i$ (SSL)/include/OpenSSL-l$ (SSL)/lib-lssl-lcryptoeofEcho "compiling and installing Python"./configure--prefix=/usr/local/python && Make&& Make InstallCD/RootEcho "To delete an installation package"RM-rf/root/python-3.6.5. tgz &&RM-rf/root/python-3.6.5Echo "Adding environment Variables"Echo "export Path=/usr/local/python/bin: $PATH">> ~/. Bash_profilesource~/. Bash_profileEcho "the installation is complete, please perform python3 to test"

Reference article: 53021686

http://blog.51cto.com/13160495/2093863

Https://www.cnblogs.com/mlgjb/p/7976561.html

"Python" CentOs7 Python3 installing OpenSSL and resolving SSL issues