command to reopen the terminal without reopening it.

source ~/.bashrc 

Basically this command will update and open the bash file in the same terminal page, But writing this sucks!

Instead, 

Type: nano ~/.bashrc

And at the end type: alias reopen='source ~/.bashrc'. After typing this, press Ctrl+O, Enter, and Ctrl+x respectively. Then type source ~/.bashrc. And you are good to go.

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Now, Typing reopen will update and reopen it on the same page. cool!

Bonus;

You can also add something like this to directly open it up from the terminal, which looks great!