linux下安裝python3

1.wgethttps://www.python.org/ftp/python/3.6.6/Python-3.6.6.tgz //預設是opt下面 安裝不成功看是否是許可權的問題

2.yum install -y gcc patch libffi-devel python-devel zlib-devel bzip2-devel openssl-devel ncurses-devel sqlite-devel readline-devel tk-devel gdbm-devel db4-devel libpcap-devel xz-devel //依賴包

3.tar -zxvf Python-3.6.6.tgz //解壓

4.cd Python-3.6.6 //進入

5. ./configure --prefix=/opt/python36 //指定安裝目錄

6. make && make install //編譯加安裝

7. vim /etc/profile //配置系統環境變數

PATH=/opt/python36/bin:/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/root/bin (python路徑寫在最前面)

8. echo $PATH //檢視環境變數

source /etc/profile //永久生效

9. cd /opt

python3 //直接輸入python3就可以進入了

10. 退出>>> 用ctrl+D 或者 exit()