安装已经直接rpm-Uvh;验证方法：有漏洞：执行：envx='(){:;};echovulnerable'bash-c"echothisisatest"显示：vulnerablethisisatest无漏洞：执行：envx='(){:;};echovulnerable'bash-c"echothisisatest"显示：bash:warning:x:ignoringfunctiondefinitionattemptbash:errorimportingfunctionde