1、首先查看系统发行版本
cat /etc/redhat-release
(base) [root@ai software]# cat /etc/redhat-release
CentOS Linux release 7.4.1708 (Core)
(base) [root@ai software]#
我们的系统是CentOS Linux release 7.4.1708 (Core)，
在没有外网的情况下，如何安装gcc
- 下载RPM包（任选一个源）
国外：
https://vault.centos.org/7.8.2003/os/x86_64/Packages/
国内：
清华源：https://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.8.2003/os/x86_64/Packages/
中科大源：https://mirrors.ustc.edu.cn/centos-vault/7.8.2003/os/x86_64/Packages/
163源：http://mirrors.163.com/centos-vault/7.8.2003/os/x86_64/Packages/
我选择的是清华源下载，打开网址：
https://mirrors.tuna.tsinghua.edu.cn/centos-vault/7.8.2003/os/x86_64/Packages/
3、依次下载如下安装包全部放在一个文件夹里：
cpp-4.8.5-39.el7.x86_64.rpm
gcc-4.8.5-39.el7.x86_64.rpm
glibc-2.17-307.el7.1.x86_64.rpm
glibc-common-2.17-307.el7.1.x86_64.rpm
glibc-devel-2.17-307.el7.1.x86_64.rpm
glibc-headers-2.17-307.el7.1.x86_64.rpm
kernel-headers-3.10.0-1127.el7.x86_64.rpm
libgcc-4.8.5-39.el7.x86_64.rpm
libgomp-4.8.5-39.el7.x86_64.rpm
libmpc-1.0.1-3.el7.x86_64.rpm
mpfr-3.1.1-4.el7.x86_64.rpm
4、安装
执行如下命令安装：
rpm -Uvh *.rpm --nodeps --force
5、验证，gcc --version
(base) [root@ai software]# gcc --version
gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-39)
Copyright (C) 2015 Free Software Foundation, Inc.
This is free software; see the source for copying conditions. There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
(base) [root@ai software]#
6、验证，make --version
(base) [root@ai software]# make --version
GNU Make 3.82
Built for x86_64-redhat-linux-gnu
Copyright (C) 2010 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.
(base) [root@ai software]#
大功告成。