The notation of the terminal has changed.
I do n’t know what happened when I googled.

It would be helpful if you could tell me what is happening.
Also, if you can tell me how to solve it, it will be very helpful.

Current status
admin @ user name%
user name admin $
(I remember it)
Environmental information
macOS Catalina 10.15.1
Terminal 2.10
Other useful information

Execution result of terminal command ls-a at root (partially hidden)
* If i paste it as it is, it will be difficult to see the format and it will be difficult to see

  • Answer # 1

    Solved. The information is summarized below for your reference.

    The appearance of the shell (reference URL) changes from bash to zsh.

    It seems to have changed by changing to Catalina. I apologize to you for a fuss over.
    (In macOS 10.15 Catalina, zsh is the default shell instead of bash.)

    Various functions (plug-ins) can be used by changing from bash to zsh.
    For example, it is now possible to move a directory with a tab, which has been a direct hit, until now, with a command input error completion function, and color-coded according to the input contents. There seems to be a drawback of slow startup, but I was at an acceptable level. (Click here for details)

    As a result, the appearance and functions have been improved!

    By the way, if you want to change "%" to "$", you can use the following command.
    PROMPT = '% m:% F {green}% ~% f% n% F {yellow} $% f'
    Reference URL

    Conversely, if you want to change "$" to "%",
    PROMPT = "% {$fg [cyan]%}% c% {$reset_color%} %%"
    Reference URL