Différence entre /# et ~# debian

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~

~

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man bash

Prompting

PROMPTING
       When  executing  interactively,  bash displays the primary prompt PS1 when it is ready to read a command, and the secondary
       prompt PS2 when it needs more input to complete a command.  Bash allows these prompt strings to be customized by  inserting
       a number of backslash-escaped special characters that are decoded as follows:
              \a     an ASCII bell character (07)
              \d     the date in "Weekday Month Date" format (e.g., "Tue May 26")
              \D{format}
                     the  format  is  passed  to  strftime(3)  and  the result is inserted into the prompt string; an empty format
                     results in a locale-specific time representation.  The braces are required
              \e     an ASCII escape character (033)
              \h     the hostname up to the first `.'
              \H     the hostname
              \j     the number of jobs currently managed by the shell
              \l     the basename of the shell's terminal device name
              \n     newline
              \r     carriage return
              \s     the name of the shell, the basename of $0 (the portion following the final slash)
              \t     the current time in 24-hour HH:MM:SS format
              \T     the current time in 12-hour HH:MM:SS format
              \@     the current time in 12-hour am/pm format
              \A     the current time in 24-hour HH:MM format
              \u     the username of the current user
              \v     the version of bash (e.g., 2.00)
              \V     the release of bash, version + patch level (e.g., 2.00.0)
              \w     the current working directory, with $HOME abbreviated with a tilde (uses  the  value  of  the  PROMPT_DIRTRIM
                     variable)
              \W     the basename of the current working directory, with $HOME abbreviated with a tilde
              \!     the history number of this command
              \#     the command number of this command
              \$     if the effective UID is 0, a #, otherwise a $
              \nnn   the character corresponding to the octal number nnn
              \\     a backslash
              \[     begin  a  sequence  of non-printing characters, which could be used to embed a terminal control sequence into
                     the prompt
              \]     end a sequence of non-printing characters

       The command number and the history number are usually different: the history number of a command is  its  position  in  the
       history  list,  which  may include commands restored from the history file (see HISTORY below), while the command number is
       the position in the sequence of commands executed during the current shell session.  After the string  is  decoded,  it  is
       expanded  via  parameter  expansion, command substitution, arithmetic expansion, and quote removal, subject to the value of
       the promptvars shell option (see the description of the shopt command under SHELL BUILTIN COMMANDS below).