Centos 7 升级gcc yum -y install centos-release-scl yum -y install devtoolset-9-gcc devtoolset-9-gcc-c devtoolset-9-binutils scl enable devtoolset-9 bashcat CentOS-SCLo-scl.repo [sclo-rh] nameCentOS-7 - SCLo RH - Aliyun Vault baseurlhttps://mirrors.aliyun.com/centos-vault/7.9.2009/sclo/$basearch/rh/ gpgcheck1 gpgkeyhttps://mirrors.aliyun.com/centos-vault/RPM-GPG-KEY-CentOS-SIG-SCLo enabled1