These alternative binary identification methods are totally functional. And, I really like the one's using awk, as I couldn't quite remember the syntaxic use with single binary chars. However, it should also be possible to assign a shell variable a value in a POSIX portable fashion (i.e. TAB=echo "@" | tr "\100" "\011"), and then employ it from there everywhere, in a POSIX portable fashion; as well (i.e grep "$TAB" filename). While this solution works well with TAB, it will also work well other binary chars, when another desired binary value is used in the assignment (instead of the value for the TAB character to 'tr').

如果使用GNU grep，你可以使用perl风格的regexp:

grep -P '\t' *

答案更简单。编写grep并在引号中输入tab键，它至少在ksh中工作得很好

grep "  " *

These alternative binary identification methods are totally functional. And, I really like the one's using awk, as I couldn't quite remember the syntaxic use with single binary chars. However, it should also be possible to assign a shell variable a value in a POSIX portable fashion (i.e. TAB=echo "@" | tr "\100" "\011"), and then employ it from there everywhere, in a POSIX portable fashion; as well (i.e grep "$TAB" filename). While this solution works well with TAB, it will also work well other binary chars, when another desired binary value is used in the assignment (instead of the value for the TAB character to 'tr').

一种方法是(这是Bash)

grep -P '\t'

-P将打开Perl正则表达式，因此\t将工作。

正如用户unwind所说，它可能是特定于GNU grep的。另一种方法是在shell、编辑器或终端允许的情况下插入一个制表符。

你可以打字 Grep \t foo 或

grep '\t' foo

在文件foo中搜索制表符。您可能还可以使用其他转义代码，尽管我只测试了\n。虽然这相当耗时，而且不清楚为什么要这样做，但在zsh中，您还可以键入制表符，回到开头，grep并将制表符用引号括起来。