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前因
我服务器上想用curl下载docker-compress，发现没有curl命令，就去下载安装，安装完成之后，报-bash: curl: command not found
解决方法
[root@centos ~]# rpm -e --nodeps curl
warning: file /usr/bin/curl: remove failed: No such file or directory[root@centos ~]# yum remove curl
Loaded plugins: fastestmirror, langpacks
No Match for argument: curl
No Packages marked for removal[root@centos ~]# rpm -qa|grep curl
python-pycurl-7.19.0-19.el7.x86_64
libcurl-7.29.0-57.el7_8.1.x86_64[root@centos ~]# yum -y install curl
Loaded plugins: fastestmirror, langpacks
Loading mirror speeds from cached hostfile
Resolving Dependencies
--> Running transaction check
---> Package curl.x86_64 0:7.29.0-57.el7_8.1 will be installed
--> Finished Dependency ResolutionDependencies Resolved
============================================================================================================================================Package Arch Version Repository Size
============================================================================================================================================
Installing:curl x86_64 7.29.0-57.el7_8.1 updates 271 kTransaction Summary
============================================================================================================================================
Install 1 PackageTotal download size: 271 k
Installed size: 528 k
Downloading packages:
curl-7.29.0-57.el7_8.1.x86_64.rpm | 271 kB 00:00:00
Running transaction check
Running transaction test
Transaction test succeeded
Running transaction
Warning: RPMDB altered outside of yum.
** Found 5 pre-existing rpmdb problem(s), 'yum check' output follows:
abrt-addon-kerneloops-2.1.11-57.el7.centos.x86_64 has missing requires of curl
abrt-addon-xorg-2.1.11-57.el7.centos.x86_64 has missing requires of curl
2:postfix-2.10.1-9.el7.x86_64 has missing requires of libmysqlclient.so.18()(64bit)
2:postfix-2.10.1-9.el7.x86_64 has missing requires of libmysqlclient.so.18(libmysqlclient_18)(64bit)
rpm-4.11.3-43.el7.x86_64 has missing requires of curlInstalling : curl-7.29.0-57.el7_8.1.x86_64 1/1 Verifying : curl-7.29.0-57.el7_8.1.x86_64 1/1
Installed:curl.x86_64 0:7.29.0-57.el7_8.1
Complete![root@centos ~]# curl --version
curl 7.29.0 (x86_64-redhat-linux-gnu) libcurl/7.29.0 NSS/3.44 zlib/1.2.7 libidn/1.28 libssh2/1.8.0
Protocols: dict file ftp ftps gopher http https imap imaps ldap ldaps pop3 pop3s rtsp scp sftp smtp smtps telnet tftp
Features: AsynchDNS GSS-Negotiate IDN IPv6 Largefile NTLM NTLM_WB SSL libz unix-sockets
[root@centos ~]#
其实我第一次按照csdn一篇博客试了一下，是失败的，第二次又找了篇博客园的文章试了下，就成功了，但两篇文章的内容是一模一样的，也很离谱。