see PATH：echo $PATH
To add python3 Column
Modify method 1 ：
export PATH=$PATH:$HOME/bin:
export PATH=$PATH:$HOME/bin:/usr/local/python3/bin
// After configuration, you can use echo $PATH View configuration results .
Effective method ： Immediate effect
Term of validity ： A temporary change , Only valid in the current terminal window , When the current window is closed, it will be restored path To configure
Scope of authority ： Only for current users
Modify method 2 ：
By modifying the .bashrc file :
vim ~/.bashrc
// Add... To the last line ：
export PATH=$PATH:$HOME/bin:
export PATH=$PATH:$HOME/bin:/usr/local/python3/bin
Effective method ：（ There are two ）
1、 Close the current terminal window , Reopening a new terminal window will take effect
2、 Input “source ~/.bashrc” command , Immediate effect
Term of validity ： Permanent validity
Scope of authority ： Only for current users
Modify method 3 :
By modifying the profile file :
vim /etc/profile
/export PATH // Find settings PATH The line of , add to
export PATH=$PATH:$HOME/bin:
export PATH=$PATH:$HOME/bin:/usr/local/python3/bin
must ： System restart
Term of validity ： Permanent validity
Scope of authority ： For all users
Modify method 4 :
By modifying the environment file :
vim /etc/environment
stay PATH="/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:" Add “/usr/local/python3/bin”
must ： System restart
Scope of authority ： Permanent validity
