ubunbtu add Environment variables to system（ubuntu添加环境变量到系统的三种方法）

ubuntu add Environment variables to system:

There are 3 methods:
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1.Temporary
$ export PATH=/home/sll/anaconda3/bin:$PATH(your path,the same below)

(your path,the same below)
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2.Current user's global settings and permanent:
open   ~/.bashrc:
$ sudo gedit ~/.bashrc

and add at the end of the file:
 export PATH=/home/sll/anaconda3/bin:$PATH

and then make it work:
$ source .bashrc
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3.all users's global settings and permanent:

$ vim /etc/profile

and add at the end of the file:
export PATH=/home/sll/anaconda3/bin:$PATH

and then make it work:
$ source profile

finally,you can test if it is successful：

$ echo $PATH

The process of loading profile and bashrc is as follows:

1)/etc/profile-------->/etc/profile.d/*.sh
2)$HOME/.bash_profile-------->$HOME/.bashrc---------->/etc/bashrc

Reference blog(参考博客)：https://blog.csdn.net/witsmakemen/article/details/7831631（For more detail,please click here 详细请看此博客）