for example, i want to match the string “abcabc” in a text file, where the two (and only two) “abc” are attached together, and no characters are in front of and at the end of “abcabc”?
if i use grep -n ‘(abc){2}’ TEST, it does not work
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for example, i want to match the string “abcabc” in a text file, where the two (and only two) “abc” are attached together, and no characters are in front of and at the end of “abcabc”?
if i use grep -n ‘(abc){2}’ TEST, it does not work
Escape the parentesis:
if you want to match the string
abcabcalone on a line, as your description seems to suggest, use: