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Windows 10 Ubuntu App Shell


su : root -> .bashrc

.bash_profile -> ssh


When Bash is invoked as an interactive login shell, or as a 
 non-interactive shell with the --login option, it first reads 
 and executes commands from the file /etc/profile, if that file
 exists. After reading that file, it looks for ~/.bash_profile, 
 ~/.bash_login, and ~/.profile, in that order, and reads and executes
 commands from the first one that exists and is readable. The 
 --noprofile option may be used when the shell is started to inhibit
 this behavior.

.bashrc is a shell script that Bash runs whenever it is started interactively. It initializes an interactive shell session. You can put any command in that file that you could type at the command prompt.

There could be some messy implementation variations depending on the flavour of Unix, Ubuntu, macOS, etc.