Compiling and Installing STAR

Use PuTTY to log in to the server as the root user.
Run the following command to install the system dependency zlib-devel:
```
yum install zlib-devel -y
```
The Yum source is a local source of the CentOS 7.6 image. You can modify the files in the /etc/yum.repos.d directory as required.
Run the following commands to decompress the STAR installation package:
```
tar -xvf STAR-2.7.1a.tar.gz
```
Run the following command to switch to the directory generated after the package is decompressed:
```
cd STAR-2.7.1a
export BLAST_TOP=`pwd`
```
Run the following commands to modify the Makefile file:
1. Open Makefile.
```
vi source/Makefile
```
2. Press i to enter the insert mode and modify the file as follows:
```
LDFLAGSextra ?= -flto -march=native -mcpu=tsv110
CXXFLAGSextra ?= -flto -march=native -mcpu=tsv110
```
3. Press Esc, type :wq!, and press Enter to save the file and exit.
Run the following commands to compile and install STAR:
```
cd source
make STAR
```
Run the following command to check whether an executable file is generated:
```
-rwxr-xr-x 1 root root 2018464 Aug  9 13:29 STAR
```
Run the following command to set STAR environment variables:
```
export PATH=/path/to/STAR/STAR-2.7.1a/source/:$PATH
```

Parent topic: STAR 2.7.1a Porting Guide (CentOS 7.6)