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grep exact match Code Example
grep exact match 
echo olavo|grep -E "^olavo$" # returns olavo
echo olavo|grep -E "ola$"    # returns none
grep first match 
Just combine grep with head command for filtering  only the first match as:
grep "match" | head -n 1   #Change 1 to not only match first but further matches
grep or match 
$ grep "PATTERN1\|PATTERN2" FILE
$ grep -E "PATTERN1|PATTERN2" FILE
$ grep -e PATTERN1 -e PATTERN2 FILE
$ egrep "PATTERN1|PATTERN2" FILE
Source: www.shellhacks.com



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Type:
 Code Example
Category:
 Coding
Sub Category:
 Code Example
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