在使用'less'命令时在Unix中显示特殊字符 [英] Show special characters in Unix while using 'less' Command

问题描述

我想知道如何在使用'less'命令时查看特殊字符。例如，我想看到不可打印的字符与一个特殊的符号。例如在vi编辑器中，我使用set list on来查看由美元$字符表示的行终止字符。类似地，我想使用'less'命令。

我引用Unix少了手动，但是没有效果。

解决方案

在其环境中查看是否有一个名为LESS的变量

你的〜/ .profile（.bash_rc等等），然后任何时候从命令行运行少，它会找到LESS。

尝试添加此

  export LESS = -  CQaix4
  

这是我使用的设置，有一些嵌入的行为可能会混淆你，所以...

您可以从更少中的帮助功能中找出所有这些意味着什么，只需点击h键和鼻子，

$ b

编辑

，并注意到还有一个-r选项

  -r -R .... --raw-control-chars  - -RAW-CONTROL-CHARS 
输出原始控制字符。 
  

我同意猫可能是您所声明需求的最准确匹配。

  cat -vet文件| 
 

在每一行的末尾添加'$'，并将tab char转换为visual'^ I' 。

  cat --help 
（编辑）
 -e相当于-vE 
  - E，--show-ends在每行末尾显示$ 
 -t等效于-vT 
 -T，--show-tabs显示TAB字符为^ I 
 -v， - -show-nonprinting使用^和M-符号，除了LFD和TAB 
  

我希望这有帮助。

I would like to know how to view special characters while using 'less' command. For instance I want to see the non-printable characters with a special notation. For instance in 'vi' editor I use "set list on" to see the line termination characters represented by dollar '$' character. Similarly I would want to do this using 'less' command.

I referred Unix less manual, but to no avail.

解决方案

less will look in its environment to see if there is a variable named LESS

You can set LESS in one of your ~/.profile (.bash_rc, etc, etc) and then anytime you run less from the comand line, it will find the LESS.

Try adding this

 export LESS="-CQaix4"

This is the setup I use, there are some behaviors embedded in that may confuse you, so ...

You can find out about what all of these mean from the help function in less, just tap the 'h' key and nose around, or run less --help.

edit

I looked at the help, and noticed there is also an -r option

-r  -R  ....  --raw-control-chars  --RAW-CONTROL-CHARS
                Output "raw" control characters.

I agree that cat may be the most exact match to your stated needs.

 cat -vet file | less

Will add '$' at end of each line and convert tab char to visual '^I'.

 cat --help
   (edited)
    -e                       equivalent to -vE
    -E, --show-ends          display $ at end of each line
    -t                       equivalent to -vT
    -T, --show-tabs          display TAB characters as ^I
    -v, --show-nonprinting   use ^ and M- notation, except for LFD and TAB

I hope this helps.

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