下面是问Ubuntu的答案:

告诉grep使用由Perl定义的正则表达式(Perl拥有 \t as tab): grep -P "\t" <文件名称> . grep "\t" <文件名称> . grep "\t 使用文字制表符: grep "^V<tab>" <文件名> . grep "^V<tab> 使用printf打印制表符: Grep "$(printf '\t')"<文件名>

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

基本上有两种解决方法:

(Recommended) Use regular expression syntax supported by grep(1). Modern grep(1) supports two forms of POSIX 1003.2 regex syntax: basic (obsolete) REs, and modern REs. Syntax is described in details on re_format(7) and regex(7) man pages which are part of BSD and Linux systems respectively. The GNU grep(1) also supports Perl-compatible REs as provided by the pcre(3) library. In regex language the tab symbol is usually encoded by \t atom. The atom is supported by BSD extended regular expressions (egrep, grep -E on BSD compatible system), as well as Perl-compatible REs (pcregrep, GNU grep -P). Both basic regular expressions and Linux extended REs apparently have no support for the \t. Please consult UNIX utility man page to know which regex language it supports (hence the difference between sed(1), awk(1), and pcregrep(1) regular expressions). Therefore, on Linux: $ grep -P '\t' FILE ... On BSD alike system: $ egrep '\t' FILE ... $ grep -E '\t' FILE ... Pass the tab character into pattern. This is straightforward when you edit a script file: # no tabs for Python please! grep -q ' ' *.py && exit 1 However, when working in an interactive shell you may need to rely on shell and terminal capabilities to type the proper symbol into the line. On most terminals this can be done through Ctrl+V key combination which instructs terminal to treat the next input character literally (the V is for "verbatim"): $ grep '<Ctrl>+<V><TAB>' FILE ... Some shells may offer advanced support for command typesetting. Such, in bash(1) words of the form $'string' are treated specially: bash$ grep $'\t' FILE ... Please note though, while being nice in a command line this may produce compatibility issues when the script will be moved to another platform. Also, be careful with quotes when using the specials, please consult bash(1) for details. For Bourne shell (and not only) the same behaviour may be emulated using command substitution augmented by printf(1) to construct proper regex: $ grep "`printf '\t'`" FILE ...

使用'sed-as-grep'方法，但是用个人偏好的可见字符替换制表符是我最喜欢的方法，因为它清楚地显示了哪些文件包含所请求的信息，以及它在行的位置:

sed -n 's/\t/\*\*\*\*/g' file_name

如果您希望使用行/文件信息，或其他grep选项，但也希望看到制表符的可见替换，您可以通过

grep -[options] -P '\t' file_name | sed 's/\t/\*\*\*\*/g'

举个例子:

$ echo "A\tB\nfoo\tbar" > test
$ grep -inH -P '\t' test | sed 's/\t/\*\*\*\*/g'
test:1:A****B
test:2:foo****bar

编辑:显然，上面的内容只对查看文件内容以定位选项卡有用——如果目标是将选项卡作为更大的脚本会话的一部分来处理，那么这没有任何有用的用途。

在其他答案中给出的$'\t'符号是特定于shell的——它似乎在bash和zsh中工作，但不是通用的。

注意:下面是针对fish shell的，在bash中不起作用:

在fish shell中，可以使用不带引号的\t，例如:

grep \t foo.txt

或者可以使用十六进制或unicode符号，例如:

grep \X09 foo.txt
grep \U0009 foo.txt

(这些符号对于更深奥的字符很有用)

因为这些值必须是不加引号的，所以可以将加引号的值和不加引号的值进行拼接:

grep "foo"\t"bar"

您也可以使用Perl一行程序来代替grep响应。grep - p:

perl -ne 'print if /\t/' FILENAME