内容: 介绍cURL。
Version 7.50
curl是一个命令行工具，用于从服务器获取数据或者向服务器发送数据，支持的协议有：
DICT, FILE, FTP, FTPS, GOPHER, HTTP, HTTPS, IMAP,
IMAPS, LDAP, LDAPS, POP3, POP3S, RTMP, RTSP, SCP, SFTP, SMB, SMBS,
SMTP, SMTPS, TELNET, TFTP
curl提供了一大堆功能，比如支持代理、用户认证、FTP上传、HTTP POST、SSL链接、cookie、Metalink、文件传输恢复等。正如手册所说：
As you will see below, the number of features will make your head spin!
curl依赖于libcurl库，”man 3 libcurl“查看libcurl的详细信息。
CentOS Linux release 7.9.2009 (Core)
安装最新版本：
# vim /etc/yum.repos.d/city-fan.repo [CityFan] name=City Fan Repo baseurl=http://www.city-fan.org/ftp/contrib/yum-repo/rhel$releasever/$basearch/ enabled=1 gpgcheck=0 # yum clean all # yum install curl
安装的可执行程序
curl
is a command line tool for transferring files with URL syntax.
curl-config
prints information about the last compile, like libraries linked to and prefix setting.
参考文献
Homepage: http://curl.haxx.se
Doc: https://curl.haxx.se/docs/manpage.html
Wiki: https://en.wikipedia.org/wiki/CURL
yum – Upgrade cURL to latest on CentOS – Server Fault