Introduction to Unix |
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5.5. PS1¶
The appearance of the command prompt is determined by the PS1 environment
variable. This is often set in the ~/.bash_profile file. It may contain
fixed characters and the following symbols.
| Symbol | Meaning |
|---|---|
| \a | an ASCII bell character (07) |
| \d | the date in “Weekday Month Date” format (e.g., “Tue May 26”) |
| \D{format} | the date - the format is passed to strftime(3) |
| \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 |
| \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 |
| \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 |
