Linux 在终端输入空字符
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Type null character in terminal
提问by functionalCode
Is there a way to type the null character in the terminal?
有没有办法在终端中输入空字符？
I would like to do something like:
我想做类似的事情：
this is a sentence (null) test123
回答by tjarratt
Apparently you can type this character with ^@ on some character sets. This wikipedia article on the null charactermay be helpful.
显然，您可以在某些字符集上使用 ^@ 键入此字符。这篇关于空字符的维基百科文章可能会有所帮助。
回答by Oskar N.
$ echo -e "this is a sentence $ echo -e "this is a sentence ##代码## test123" | cat --show-nonprinting
this is a sentence ^@ test123
test123"
this is a sentence test123
The null here ^^ IS NOT visible
The null here ^^ IS NOT visible
But it IS here ^^
But it IS here ^^
But maybe you did not want this for a script?
但是也许您不希望将其用于脚本？
回答by AXE Labs
As with the abort command (Ctrl-C), in most terminals just hit Ctrl-@(with the use of Shifton my keyboard).
与 abort 命令 ( Ctrl- C) 一样，在大多数终端中只需点击Ctrl- @（Shift在我的键盘上使用）。
回答by unode
In Linux, any special character can be literally inserted on the terminal by pressing Ctrl+vfollowed by the actual symbol. nullis usually ^@where ^stands for Ctrland @for whatever combination on your keyboard layout that produces @.
在 Linux 中，任何特殊字符都可以通过按Ctrl+v后跟实际符号来直接插入到终端上。null通常是^@其中^代表Ctrl，并@为在产生你的键盘布局什么组合@。
So on my keyboard I do: Ctrl+vfollowed by Ctrl+Shift+@and I get a ^@symbol with a distinguished background color. This means it's a special character and not just ^and @typed in.
所以在我的键盘上我这样做：Ctrl+v后跟Ctrl+ Shift+@我得到一个^@具有独特背景颜色的符号。这意味着它是一个特殊的角色，而不仅仅是^与@中键入。
Edit:Several years later and a few input variations implemented by different terminals using keyboard layouts that require pressing Shiftto access @.
编辑：几年后，不同终端使用需要按下Shift才能访问的键盘布局实现了一些输入变化@。
- Ctrl+vfollowed by Ctrl+Shift+@
- Ctrl+vfollowed by Shift+@withoutreleasing Ctrl.
- Ctrl+Shift+vfollowed by @withoutreleasing Ctrl+Shift.
- Ctrl+Shiftrelease Shiftand re-press Shiftkeeping both Ctrl+Shiftpressed followed by vand finally @. Seen in some terminals that implement a special input on Ctrl+Shift.
- Ctrl+v后跟Ctrl+ Shift+@
- Ctrl+v后跟Shift+@不释放Ctrl.
- Ctrl+ Shift+v其次@，而不释放Ctrl+ Shift。
- Ctrl+Shift释放Shift并重新按下，Shift同时按下Ctrl+和最后。在一些在+上实现特殊输入的终端中可以看到。Shiftv@CtrlShift
