大佬们各种情况都说了，我说一下我的情况
直接贴解决方案，记录一下，首先 在网上看见wget的默认目录为/usr/local/bin/wget
[root@duckweed mysql]# cd /usr/local/bin
[root@duckweed bin]# ls
chardetect cloud-id cloud-init cloud-init-per easy_install easy_install-3.6 easy_install-3.8 jsondiff jsonpatch jsonpointer jsonschema
发现没有这个目录，于是rpm -qa|grep wget 一下发现确实安装了
[root@duckweed bin]# rpm -qa|grep wget
wget-1.19.5-8.el8_1.1.x86_64灵光一闪，果断卸载
[root@duckweed bin]# rpm -e wget-1.19.5-8.el8_1.1.x86_64
warning: file /usr/bin/wget: remove failed: No such file or directory不管这个警告（本来就没有这个目录），确认删除成功后重新安装
[root@duckweed bin]# rpm -qa|grep wget
[root@duckweed bin]# yum install -y wget
Repository epel is listed more than once in the configuration
Last metadata expiration check: 0:47:54 ago on Fri 14 Aug 2020 02:46:55 PM CST.
Dependencies resolved.
==============================================================================================================================================================================================
Package Architecture Version Repository Size
==============================================================================================================================================================================================
Installing:
wget x86_64 1.19.5-8.el8_1.1 AppStream 735 k
Transaction Summary
==============================================================================================================================================================================================
Install 1 Package
Total download size: 735 k
Installed size: 2.9 M
Downloading Packages:
wget-1.19.5-8.el8_1.1.x86_64.rpm 1.8 MB/s | 735 kB 00:00
----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Total 1.8 MB/s | 735 kB 00:00
Running transaction check
Transaction check succeeded.
Running transaction test
Transaction test succeeded.
Running transaction
Preparing : 1/1
Installing : wget-1.19.5-8.el8_1.1.x86_64 1/1
Running scriptlet: wget-1.19.5-8.el8_1.1.x86_64 1/1
Verifying : wget-1.19.5-8.el8_1.1.x86_64 1/1
Installed:
wget-1.19.5-8.el8_1.1.x86_64
Complete!
确认安装成功
[root@duckweed bin]# wget
wget: missing URL
Usage: wget [OPTION]... [URL]...
Try `wget --help' for more options.记录一下，记得点赞哦亲！