This demonstration is to install Nginx under CentOS6.5/' target='_blank'>CentOS6.5Operating system:
CentOS6.5/' target='_blank'> CentOS6.5-x86-64Nginx version: nginx-release-centos-6-0.el6.ngx.noarch.rpm
Nginx download address: http://nginx.org/en/linux_packages .html#stable
Epel version: epel-release-6-8.noarch.rpm
Epel package download address: http://dl.fedoraproject.org/pub/epel/6/x86_64/epel-release-6 -8.noarch.rpm
Epel source mirror address: http://mirrors.ustc.edu.cn/fedora/epel/6/x86_64/
1. Install the EPEL package
Because installing nginx requires configuring the EPEL source. So first install the EPEL rpm package, go to the directory of epel-release-6-8.noarch.rpm, and install EPEL:
[root@localhost tmp]# rpm -ivh epel-release-6-8.noarch.rpm warning: epel-release-6-8.noarch.rpm: HeaderV3 RSA/SHA256 Signature, key ID 0608b895: NOKEY Preparing... ########################################### [100%] 1:epel-release ########################################### [100%]
2. Configure the EPEL source
Since this demonstration is not connected to the Internet, nginx needs the EPEL source You need to download the file yourself and configure the source:
[root@localhost tmp]# vi /etc/yum.repos.d/epel.repo
Modification: (The EPEL source package required here is placed in the /tmp/epel directory)
baseurl=file:///tmp/epel
Note:
#mirrorlist
Attachment: This is the EPEL source file required to install nginx (under the /tmp/epel directory)
(Mirror address: http://mirrors.ustc.edu.cn/fedora/epel/6/x86_64/)
[root@localhost tmp]# rpm -ivh nginx-release-centos-6-0.el6.ngx.noarch.rpm
warning:nginx-release-centos-6-0.el6.ngx.noarch.rpm: Header V4 RSA/SHA1 Signature, keyID 7bd9bf62: NOKEY
Preparing... ########################################### [100%]
1:nginx-release-centos ########################################### [100%]</p>
<p></p>2) Delete nginx source<br><pre name="code">[root@localhost yum.repos.d]# pwd
/etc/yum.repos.d
[root@localhost yum.repos.d]# rm nginx.repo
rm: remove regular file `nginx.repo'? y
[root@localhost yum.repos.d]# yum install nginx Loaded plugins: fastestmirror, security Loading mirror speeds from cached hostfile Setting up Install Process Resolving Dependencies --> Running transaction check ---> Package nginx.x86_640:1.0.15-12.el6 will be installed --> Processing Dependency:nginx-filesystem = 1.0.15-12.el6 for package: nginx-1.0.15-12.el6.x86_64 --> Processing Dependency:nginx-filesystem for package: nginx-1.0.15-12.el6.x86_64 --> Processing Dependency: gd forpackage: nginx-1.0.15-12.el6.x86_64 --> Processing Dependency: GeoIP forpackage: nginx-1.0.15-12.el6.x86_64 --> Processing Dependency:libgd.so.2()(64bit) for package: nginx-1.0.15-12.el6.x86_64 --> Processing Dependency:libGeoIP.so.1()(64bit) for package: nginx-1.0.15-12.el6.x86_64 --> Running transaction check ---> Package GeoIP.x86_64 0:1.6.5-1.el6will be installed --> Processing Dependency: geoipupdatefor package: GeoIP-1.6.5-1.el6.x86_64 --> Processing Dependency: GeoIP-datafor package: GeoIP-1.6.5-1.el6.x86_64 ---> Package gd.x86_64 0:2.0.35-11.el6will be installed --> Processing Dependency:libXpm.so.4()(64bit) for package: gd-2.0.35-11.el6.x86_64 ---> Package nginx-filesystem.noarch0:1.0.15-12.el6 will be installed --> Running transaction check ---> Package GeoIP-GeoLite-data.noarch0:2015.04-2.el6 will be installed --> Processing Dependency:GeoIP-GeoLite-data-extra = 2015.04-2.el6 for package:GeoIP-GeoLite-data-2015.04-2.el6.noarch ---> Package geoipupdate.x86_640:2.2.1-2.el6 will be installed ---> Package libXpm.x86_640:3.5.10-2.el6 will be installed --> Running transaction check ---> PackageGeoIP-GeoLite-data-extra.noarch 0:2015.04-2.el6 will be installed --> Finished Dependency Resolution Dependencies Resolved ================================================================================================ Package Arch Version Repository Size ================================================================================================ Installing: nginx x86_64 1.0.15-12.el6 epel 404 k Installing for dependencies: GeoIP x86_64 1.6.5-1.el6 epel 113 k GeoIP-GeoLite-data noarch 2015.04-2.el6 epel 343 k GeoIP-GeoLite-data-extra noarch 2015.04-2.el6 epel 23 M gd x86_64 2.0.35-11.el6 base 142 k geoipupdate x86_64 2.2.1-2.el6 epel 28 k libXpm x86_64 3.5.10-2.el6 base 51 k nginx-filesystem noarch 1.0.15-12.el6 epel 8.1 k Transaction Summary ================================================================================================ Install 8 Package(s) Total download size: 24 M Installed size: 50 M Is this ok [y/N]: y Downloading Packages: ------------------------------------------------------------------------------------------------ Total 61 MB/s | 24 MB 00:00 warning: rpmts_HdrFromFdno: Header V3RSA/SHA256 Signature, key ID 0608b895: NOKEY Retrieving key fromfile:///etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 Importing GPG key 0x0608B895: Userid : EPEL (6)<epel> Package: epel-release-6-8.noarch (installed) From :/etc/pki/rpm-gpg/RPM-GPG-KEY-EPEL-6 Is this ok [y/N]: y Running rpm_check_debug Running Transaction Test Transaction Test Succeeded Running Transaction Warning: RPMDB altered outside of yum. Installing : GeoIP-GeoLite-data-extra-2015.04-2.el6.noarch 1/8 Installing : GeoIP-GeoLite-data-2015.04-2.el6.noarch 2/8 Installing : geoipupdate-2.2.1-2.el6.x86_64 3/8 Installing : GeoIP-1.6.5-1.el6.x86_64 4/8 Installing : libXpm-3.5.10-2.el6.x86_64 5/8 Installing : gd-2.0.35-11.el6.x86_64 6/8 Installing : nginx-filesystem-1.0.15-12.el6.noarch 7/8 Installing : nginx-1.0.15-12.el6.x86_64 8/8 Verifying : nginx-filesystem-1.0.15-12.el6.noarch 1/8 Verifying :GeoIP-1.6.5-1.el6.x86_64 2/8 Verifying :GeoIP-GeoLite-data-2015.04-2.el6.noarch 3/8 Verifying :libXpm-3.5.10-2.el6.x86_64 4/8 Verifying :geoipupdate-2.2.1-2.el6.x86_64 5/8 Verifying : GeoIP-GeoLite-data-extra-2015.04-2.el6.noarch 6/8 Verifying :nginx-1.0.15-12.el6.x86_64 7/8 Verifying :gd-2.0.35-11.el6.x86_64 8/8 Installed: nginx.x86_64 0:1.0.15-12.el6 Dependency Installed: GeoIP.x86_64 0:1.6.5-1.el6 GeoIP-GeoLite-data.noarch 0:2015.04-2.el6 GeoIP-GeoLite-data-extra.noarch 0:2015.04-2.el6 gd.x86_64 0:2.0.35-11.el6 geoipupdate.x86_64 0:2.2.1-2.el6 libXpm.x86_640:3.5.10-2.el6 nginx-filesystem.noarch 0:1.0.15-12.el6 Complete!</epel>4) Run and check nginx
[root@localhost yum.repos.d]# nginx [root@localhost yum.repos.d]# whereis nginx nginx: /usr/sbin/nginx /etc/nginx/usr/share/nginx /usr/share/man/man8/nginx.8.gz/usr/share/man/man3/nginx.3pm.gz5) nginx version
[root@localhost yum.repos.d]# /usr/sbin/nginx -v nginx version: nginx/1.0.15
4. Log in to view , Successful

What’s still popular is the ease of use, flexibility and a strong ecosystem. 1) Ease of use and simple syntax make it the first choice for beginners. 2) Closely integrated with web development, excellent interaction with HTTP requests and database. 3) The huge ecosystem provides a wealth of tools and libraries. 4) Active community and open source nature adapts them to new needs and technology trends.

PHP and Python are both high-level programming languages that are widely used in web development, data processing and automation tasks. 1.PHP is often used to build dynamic websites and content management systems, while Python is often used to build web frameworks and data science. 2.PHP uses echo to output content, Python uses print. 3. Both support object-oriented programming, but the syntax and keywords are different. 4. PHP supports weak type conversion, while Python is more stringent. 5. PHP performance optimization includes using OPcache and asynchronous programming, while Python uses cProfile and asynchronous programming.

PHP is mainly procedural programming, but also supports object-oriented programming (OOP); Python supports a variety of paradigms, including OOP, functional and procedural programming. PHP is suitable for web development, and Python is suitable for a variety of applications such as data analysis and machine learning.

PHP originated in 1994 and was developed by RasmusLerdorf. It was originally used to track website visitors and gradually evolved into a server-side scripting language and was widely used in web development. Python was developed by Guidovan Rossum in the late 1980s and was first released in 1991. It emphasizes code readability and simplicity, and is suitable for scientific computing, data analysis and other fields.

PHP is suitable for web development and rapid prototyping, and Python is suitable for data science and machine learning. 1.PHP is used for dynamic web development, with simple syntax and suitable for rapid development. 2. Python has concise syntax, is suitable for multiple fields, and has a strong library ecosystem.

PHP remains important in the modernization process because it supports a large number of websites and applications and adapts to development needs through frameworks. 1.PHP7 improves performance and introduces new features. 2. Modern frameworks such as Laravel, Symfony and CodeIgniter simplify development and improve code quality. 3. Performance optimization and best practices further improve application efficiency.

PHPhassignificantlyimpactedwebdevelopmentandextendsbeyondit.1)ItpowersmajorplatformslikeWordPressandexcelsindatabaseinteractions.2)PHP'sadaptabilityallowsittoscaleforlargeapplicationsusingframeworkslikeLaravel.3)Beyondweb,PHPisusedincommand-linescrip

PHP type prompts to improve code quality and readability. 1) Scalar type tips: Since PHP7.0, basic data types are allowed to be specified in function parameters, such as int, float, etc. 2) Return type prompt: Ensure the consistency of the function return value type. 3) Union type prompt: Since PHP8.0, multiple types are allowed to be specified in function parameters or return values. 4) Nullable type prompt: Allows to include null values and handle functions that may return null values.


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