Compiling and Installing AMG

Use PuTTY to log in to the server as the root user.
Run the following command to decompress the AMG installation package:
```
unzip AMG-1.2.zip
```
Run the following command to switch to the directory generated after decompression:
```
cd /path/to/AMG/AMG-1.2
```
Run the following commands to perform compilation:
```
make
```
In Makefile.include, -DHYPRE_USING_PERSISTENT_COMM optimizes the MPI and -DHYPRE_HOPSCOTCH optimizes the OpenMP.

Parent topic: AMG 1.2 Porting Guide (CentOS 7.6)