如何在bash提示中添加图标 [英] How to add an icon to the bash prompt
问题描述
我知道您可以通过编辑〜/.bashrc文件中的PS1变量来永久编辑bash提示符，我的样子是这样的:
I know you can edit the bash prompt permanently by editing the PS1 variable in your ~/.bashrc file, mine looks like this:
PS1="\[\e[0;31m\]<HERP(._.)DERP>\[\e[0;0m\]";
但是您也可以在其中设置一个小的图像吗?例如，如果我想添加一个小小的美国国旗图标，或在"HERP(._.)DERP"之前添加一些内容，
but can you set a tiny little image in there as well? For instance, if I wanted to add a little American flag icon, or something before "HERP(._.)DERP", could I do this?
推荐答案
对不起，没有.终端不做图形.
Sorry, no. Terminals don't do graphics.
有关您可以做的事情的完整描述，请参见bash(1)手册页的提示部分:
For a full description of what you can do, see the PROMPTING section of the bash(1) man page:
提示
当以交互方式执行时，bash在准备读取命令时显示主要提示PS1，在需要更多输入来完成命令时显示次要提示PS2. Bash允许通过插入许多反斜杠转义的特殊字符来自定义这些提示字符串，这些特殊字符的解码方式如下:
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
命令号和历史号通常是不同的:命令的历史号是它在历史列表中的位置，其中可能包括从历史文件中还原的命令(请参见下面的历史记录")，而命令号是位置按照在当前Shell会话期间执行的命令顺序.对该字符串进行解码后，可以通过参数扩展，命令替换，算术扩展和引号删除来扩展它，但要遵守hintvars shell选项的值(请参阅下面的SHELL BUILTIN COMMANDS下的shopt命令说明).
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).
\e，\[和\]转义序列值得特别注意.有了这些，您可以插入 ANSI转义码来命令终端更改前景颜色，背景颜色，移动光标，擦除屏幕的一部分以及其他花哨的技巧.
The \e, \[ and \] escape sequences deserve special attention. With these you can insert ANSI escape codes to command the terminal to change foreground color, background color, move the cursor, erase parts of the screen, and do other fancy tricks.
例如，这就是您的提示如何更改颜色. \[\e[0;31m\]将前景色设置为红色，\[\e[0;0m\]将其重置为默认值.
That is, for instance, how your prompt changes color. \[\e[0;31m\] sets the foreground color to red, and \[\e[0;0m\] resets it back to the default.
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