Return to Answer

Corrected grammar and added punctuations

edit approved Mar 13, 2019 at 5:39

Firstly, you need to use quotingquotes for special characters. Second, even so, grep will not understand alternation directly; you would need to use egrep, or (with GNU grep only) grep -E.

egrep 'foo|bar' *.txt

(The parentheses are unnecessary unless the alternation is part of a larger regex.)

Firstly, you need to use quoting for special characters. Second, even so grep will not understand alternation directly; you would need to use egrep, or (with GNU grep only) grep -E.

egrep 'foo|bar' *.txt

(The parentheses are unnecessary unless the alternation is part of a larger regex.)

Firstly, you need to use quotes for special characters. Second, even so, grep will not understand alternation directly; you would need to use egrep, or (with GNU grep only) grep -E.

egrep 'foo|bar' *.txt

(The parentheses are unnecessary unless the alternation is part of a larger regex.)

Source Link

answered Apr 26, 2012 at 1:06

geekosaur

32.9k
5
84
59

Firstly, you need to use quoting for special characters. Second, even so grep will not understand alternation directly; you would need to use egrep, or (with GNU grep only) grep -E.

egrep 'foo|bar' *.txt

(The parentheses are unnecessary unless the alternation is part of a larger regex.)