执行：yum -y install wget，无法正常安装。
Package wget-1.14-18.el7_6.1.x86_64 already installed and latest version
Nothing to do
卸载重新安装下，即可，执行：
#先卸载
yum remove wget
#再安装
yum -y install wget再执行：
[root@VM-0-10-centos fast]# wget https://github.com/happyfish100/libfastcommon/archive/V1.0.7.tar.gz
--2021-04-27 11:07:56-- https://github.com/happyfish100/libfastcommon/archive/V1.0.7.tar.gz
Resolving github.com (github.com)... 192.30.255.112
Connecting to github.com (github.com)|192.30.255.112|:443... connected.
Unable to establish SSL connection.发现还是无法安装：
解决方法
加上跳过验证证书的参数“--no-check-certificate”
[root@VM-0-10-centos fast]# wget --no-check-certificate https://github.com/happyfish100/libfastcommon/archive/V1.0.7.tar.gz
--2021-04-27 11:15:53-- https://github.com/happyfish100/libfastcommon/archive/V1.0.7.tar.gz
Resolving github.com (github.com)... 192.30.255.112
Connecting to github.com (github.com)|192.30.255.112|:443... connected.
... ] 73,148 154KB/s in 0.5s
2021-04-27 11:15:56 (154 KB/s) - ‘V1.0.7.tar.gz’ saved [73148]
[root@VM-0-10-centos fast]# ll
total 72
-rw-r--r-- 1 root root 73148 Apr 27 11:15 V1.0.7.tar.gz
[root@VM-0-10-centos fast]#