Customizing Your Terminal's Prompt
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.
You will need to edit your
~/.bashrc file using a text editor (e.g., emacs, vim, nano, gedit, …)
You will define a
PS1 variable and export it.
Bash Escape Sequences
The allowed escape sequences allowed in the Bash prompt are decoded as follows:
\a an ASCII bell character (07) \d the date in "Weekday Month Date" format (e.g., "Tue May 26") \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 \u the username of the current user \v the version of bash (e.g., 2.00) \V the release of bash, version + patchlevel (e.g., 2.00.0) \w the current working directory \W the basename of the current working direc tory \! 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 \[ begin a sequence of non-printing characters, which could be used to embed a terminal con trol sequence into the prompt \] end a sequence of non-printing characters
Here are some examples prompts:
PS1='[\u@\h \W]\$ '
Look at the escape sequences above to help you determine what the above prompt description means. The prompt would print out something like
This one would look like hostname:currdir
PS1="\[\e[0;35m\]\u@\h \W\$ \[\e[00m\]"
export PS1="\[\e[1;31m\]\h:\W \u\$ \[\e[00m\]"