我先贴一部分
\t the current time in HH:MM:SS format
\d the date in "Weekday Month Date" format
\s the name of the shell, the basename of $0
\w the current working directory
\W the basename of the current working directory
\u the uname of the current user
\h the hostname
\# the command number of this command
\! the history number of this command
\$ if the effective UID is 0, a #, otherwise a $