Shell Features: PS1, PS2

[Email protected] ~]# echo $PS 1                    # View the main prompt  ~]# echo $PS 2                    # View from the prompt  ~]# export ps1= ' [\[email protected]\h \w]\$ '   # Set the main prompt (temporary), If you want to permanently take effect, you should write ~/.BASHRC

\u    # user name
\h    # host name
\w    # Current working directory
\ t    # time (HH:MM:SS)
\$    # If the root user displays ' # ' otherwise displays ' $ '

Shell Features: PS1, PS2