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bash:tip_customize_the_shell_prompt [2011/06/15 17:04] flozz [Example of prompts] |
bash:tip_customize_the_shell_prompt [2011/06/22 12:39] flozz [Bash tips: Customize the shell prompt] |
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| ====== Bash tips: Customize the shell prompt ====== | ====== Bash tips: Customize the shell prompt ====== | ||
| - | FIXME | + | The prompt of Bash can be customized, and can displays several useful informations. |
| + | The main prompt is stored in the ''PS1'' variable of the shell. You can show it with the following command: | ||
| + | <code bash>echo $PS1</code> | ||
| + | and you can change it by modifying the content of this variable. For example this command will change your prompt: | ||
| + | <code bash>PS1="This is my new prompt >>> "</code> | ||
| + | If you close your terminal and open it again, the prompt is reverted to the default ; that is normal because you have not | ||
| + | save it. For permanently changing you prompt, you have to modify your ''~/.bashrc'' file. The simple way to change your | ||
| + | prompt is to add the following line at the end of the file: | ||
| + | <code bash>PS1="Prompt >>> "</code> | ||
| + | |||
| + | Now let's see the different things that can be displayed in the prompt... | ||
| ===== Prompt Helper ===== | ===== Prompt Helper ===== | ||
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| ===== Special sequences ===== | ===== Special sequences ===== | ||
| - | ^ Sequence ^ description ^ Example/Preview ^ | + | ^ Sequence ^ description ^ Example/Preview ^ |
| - | | \d | Date (''+%a %b %d'' format) ((''date'' command format)) | ''Mon Jun 13'' | | + | | \d | The date (''+%a\ %b\ %d'' format) ((''date'' command format)) | ''Mon Jun 13'' | |
| - | | \t | Time, 24-hour (''+%k:%M:%S'' format) ((''date'' command format)) | ''22:42:01'' | | + | | \D{//format//} | The date in the desired //format// (in ''strftime'' format) ((Not supported by Prompt Helper)) | | |
| - | | \T | Time, 12-hour (''+%l:%M:%S'' format) ((''date'' command format)) | ''10:42:01'' | | + | | \t | The time, 24-hour (''+%k:%M:%S'' format) ((''date'' command format)) | ''22:42:01'' | |
| - | | \@ | Time, 12-hour, with AM/PM (''+%l:%M %p'' format) ((''date'' command format)) | ''10:42 PM'' or ''10:42'' | | + | | \T | The time, 12-hour (''+%l:%M:%S'' format) ((''date'' command format)) | ''10:42:01'' | |
| - | | \h | The host name | ''hostname'' | | + | | \@ | The time, 12-hour, with AM/PM (''+%l:%M\ %p'' format) ((''date'' command format)) | ''10:42 PM'' or ''10:42'' | |
| - | | \H | The full host name (with the domain name) | ''hostname.domain'' | | + | | \A | The time, 24-hour (''+%k:%M'' format) ((''date'' command format)) | ''22:42'' | |
| - | | \j | The number of suspended processes in the current shell (<Ctrl>+Z) | ''0'' | | + | | \h | The host name | ''hostname'' | |
| - | | \l | The name of the shell's terminal device | ''tty1'' or ''1'' | | + | | \H | The full host name (with the domain name) | ''hostname.domain'' | |
| - | | \s | The name of the shell executable | ''bash'' | | + | | \j | The number of suspended processes in the current shell (<Ctrl>+Z) | ''0'' | |
| - | | \u | The current user name | ''username'' | | + | | \l | The name of the shell's terminal device | ''tty1'' or ''1'' | |
| - | | \v | The version of the shell (short) | ''4.1'' | | + | | \s | The name of the shell executable | ''bash'' | |
| - | | \V | The version of the shell (with the patch level) | ''4.1.5'' | | + | | \u | The current user name | ''username'' | |
| - | | \w | The path of the working directory | ''~/Documents'' or ''/usr/bin'' | | + | | \v | The version of the shell (short) | ''4.1'' | |
| - | | \W | The name of the working directory | ''Documents'' or ''bin'' | | + | | \V | The version of the shell (with the patch level) | ''4.1.5'' | |
| - | | \! | The current command number in the history | ''538'' | | + | | \w | The path of the working directory | ''~/Documents'' or ''/usr/bin'' | |
| - | | \# | The command number (from the start of the shell) | ''42'' | | + | | \W | The name of the working directory | ''Documents'' or ''bin'' | |
| - | | \$ | If the current user is root, displays a ''#'', else displays a ''$'' | ''$'' or ''#'' | | + | | \! | The current command number in the history | ''538'' | |
| - | | \[ | Start a sequence of non-printing characters | | | + | | \# | The command number (from the start of the shell) | ''42'' | |
| - | | \] | End a sequence of non-printing characters | | | + | | \$ | If the current user is root, displays a ''#'', else displays a ''$'' | ''$'' or ''#'' | |
| - | | \a \\ \007 | The ASCII bell character | | | + | | \[ | Start a sequence of non-printing characters | | |
| - | | \n | Start a new line | | | + | | \] | End a sequence of non-printing characters | | |
| - | | \r | Carriage return | | | + | | \a \\ \007 | The ASCII bell character | | |
| - | | ''\''''\'' | A single backslash | ''\'' | | + | | \n | Start a new line | | |
| - | | \e \\ \033 | The ASCII ''Escape'' character. Used by some [[bash:tip_customize_the_shell_prompt#control_sequences_e_033_x1b|Control Sequences]] (see bellow) | | | + | | \r | Carriage return | | |
| + | | ''\''''\'' | A single backslash | ''\'' | | ||
| + | | \e \\ \033 | The ASCII ''Escape'' character. Used by some [[bash:tip_customize_the_shell_prompt#control_sequences_e_033_x1b|Control Sequences]] (see bellow) | | | ||
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| ===== Links ===== | ===== Links ===== | ||
| - | FIXME | + | * [[bash:tip_colors_and_formatting|Bash tips: Colors and formatting]] |
| + | * [[http://www.gnu.org/software/bash/manual/bashref.html#Printing-a-Prompt|Bash manual: Printing a prompt]] | ||
| + | * [[http://www.funtoo.org/wiki/Prompt_Magic|Funtoo: Prompt magic]] | ||