grep "$(printf '\t')"在Mac OS X上为我工作

+1方式，工作在ksh，破折号等:使用printf插入制表符:

grep "$(printf 'BEGIN\tEND')" testfile.txt

我从来没有设法使“\t”元字符与grep一起工作。 然而，我发现了两个替代方案:

使用<Ctrl-V> <TAB>(按Ctrl-V然后输入TAB) 使用awk: foo | awk '/\t/'

使用gawk，将字段分隔符设置为TAB (\t)并检查字段的数量。如果多于1，则有/有制表符

awk -F"\t" 'NF>1' file

一个好的选择是使用sed。

sed -n '/\t/p' file

示例(工作在bash, sh, ksh, csh，..):

[~]$ cat testfile
12 3
1 4 abc
xa      c
        a       c\2
1 23

[~]$ sed -n '/\t/p' testfile 
xa      c
        a       c\2
[~]$ sed -n '/\ta\t/p' testfile
        a       c\2

(以下答案已根据评论中的建议进行了编辑。谢谢大家)

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').