如果你的文件是用ISO-8859-1编码的，但是你的系统区域设置是UTF-8，这是行不通的。

将文件转换为UTF-8或将您的系统区域设置更改为ISO-8859-1。

 
＃convert从擦除前的ISO-8859-1到环境区域设置
＃输出将处于当前语言环境
 $ iconv -f 8859_1 input / words.txt | grep ... 

＃使用ISO-8859-1语言环境运行grep 
＃输出将使用ISO-8859-1编码
 $ cat input / words.txt | env LC_ALL = en_US grep ... 

I'm trying mount a regex that get some words on a file where all letters of this word match with a word pattern.

My problem is, the regex can't find accented words, but in my text file there are alot of accented words.

My command line is:

cat input/words.txt | grep '^[éra]\{1,4\}$' > output/words_era.txt
cat input/words.txt | grep '^[carroça]\{1,7\}$' > output/words_carroca.txt

And the content of file is:

carroça
éra
éssa
roça
roco
rato
onça
orça
roca

How can I fix it?

If your file is encoded in ISO-8859-1 but your system locale is UTF-8, this will not work.

Either convert the file to UTF-8 or change your system locale to ISO-8859-1.

# convert from ISO-8859-1 to the environmental locale before grepping
# output will be in the current locale
$ iconv -f 8859_1 input/words.txt | grep ...

# run grep with an ISO-8859-1 locale
# output will be in ISO-8859-1 encoding
$ cat input/words.txt | env LC_ALL=en_US grep ...