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Question
In Linux, if you want to search in files and use regex features such as (+ ? \< \> ( ) | ) characters, you must use the [...] flag of grep
Answer
-E
^^ -E is short for --extended-regexp, note that grep -E is same as egrep (depricated)

Question
In Linux, if you want to search in files and use regex features such as (+ ? \< \> ( ) | ) characters, you must use the [...] flag of grep
Answer
?

Question
In Linux, if you want to search in files and use regex features such as (+ ? \< \> ( ) | ) characters, you must use the [...] flag of grep
Answer
-E
^^ -E is short for --extended-regexp, note that grep -E is same as egrep (depricated)
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5. Regular Expressions
matches any character and the * means to match the dot any number of times. egrep -w '(th|sh).*rt' Matches the words shirt , short , and thwart . The | means to match either the th or the sh . <span>egrep is just like grep but supports extended regular expressions that allow for the | feature. [ The | character often denotes a logical OR , meaning that either the thing on the left or the

Summary

statusnot learnedmeasured difficulty37% [default]last interval [days]               
repetition number in this series0memorised on               scheduled repetition               
scheduled repetition interval               last repetition or drill

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