Ardika Sulistija at 13:57, 4 October 2024

2024-10-04T13:57:44Z

← Older revision		Revision as of 13:57, 4 October 2024
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	grep -o 'needle' file \| wc -l		grep -o 'needle' file \| wc -l


			====Search for a string and show the following lines before/after it====
			----

			you can use -B num to set how many lines before the match and -A num for the number of lines after the match.
			grep -B 3 -A 2 foo README.txt

Ardika Sulistija: Created page with "grep - Pretty much a search function. Prints lines matching a pattern. ----- Examples: cat [file] | grep "word" # Prints any line with "word" grep -i # Ignore case senisitivity i is for INSENSITIVE grep -irl [word] [dir] # Ignore case distinctions, Read all files under each directory, recursively, Suppress normal output; grep [word] [in file/dir] # Searches up "word" in that file or dir g..."

2024-08-27T00:19:46Z

Created page with "<B>grep</B> - Pretty much a search function. Prints lines matching a pattern. ----- Examples: cat [file] | grep "word" # Prints any line with "word" grep -i # Ignore case senisitivity *i is for INSENSITIVE* grep -irl [word] [dir] # Ignore case distinctions, Read all files under each directory, recursively, Suppress normal output; grep [word] [in file/dir] # Searches up "word" in that file or dir g..."

New page

<B>grep</B> - Pretty much a search function. Prints lines matching a pattern.

-----

Examples:
cat [file] | grep "word" # Prints any line with "word"

grep -i # Ignore case senisitivity *i is for INSENSITIVE*

grep -irl [word] [dir] # Ignore case distinctions, Read all files under each directory, recursively, Suppress normal output;

grep [word] [in file/dir] # Searches up "word" in that file or dir

grep [x$] [file] # Searches the file with any word that ENDS "x" in it. Variation: [xxx$]
multiple letter search that ends with these letters.

grep [^x] # Searches the file with any word that STARTS with "x"

grep [^x$] # Searches lines that ONLY has 'x' in it.

grep "x.*" [file] # Searches up a letter, doesn't matter if it is in the beginnging or end of the line.

grep -i "^l.*rse$" [file] # Searches file for anything starts with "l", anything in the middle, and ends in "rse"

grep -i '[ab]' [file] # Searches all lines that have a 'a' or 'b' in it.

grep [Xx]avier # Searches lines that contain [X]avier or [x]avier

grep [wrd] [file] | grep "word" grepception.

grep -v '^x' [file] # '-v' means inverse, so this means, search all lines that DO NOT start with 'x'

grep '[^brackets]' # Search all lines with anything THAT IS NOT IN THE BRACKETS

grep --color=always # use color to highlight

====Search for two words at once====
----

grep -E 'word1|word2' *.doc

====Count the number of occurrences====
----

grep's -o will only output the matches, ignoring lines; wc can count them:

grep -o 'needle' file | wc -l

Grep - Revision history

Ardika Sulistija at 13:57, 4 October 2024