grep

grep is used to find strings and other features within a file

# See full grep options

> grep --help

# Example file - file.txt

Taylor Elementary

Fort St. John Elementary

Fort St. John Junior High 

Fort St. John High School

Edmonton Bachelor of Science

Edmonton PhD

Scottsdale Post-Doc

Phoenix Professor

# Find lines with "Edmonton" on the line

> grep Edmonton file.txt

Edmonton Bachelor of Science

Edmonton PhD

Context Specific Outputs

  -B, --before-context=NUM  print NUM lines of leading context

  -A, --after-context=NUM   print NUM lines of trailing context

  -C, --context=NUM         print NUM lines of output context

#Find lines with "Scottsdale" on the line and print the next line

> grep -A 1 Scottsdale file.txt

Scottsdale Post-Doc

Phoenix Professor

# Find lines with "Scottsdale" on the line and print the previous line

> grep -B 1 Scottsdale file.txt

Edmonton PhD

Scottsdale Post-Doc

# Find lines with "Scottsdale" on the line and print the previous AND next line

> grep -C 1 Scottsdale file.txt

Edmonton PhD

Scottsdale Post-Doc

Phoenix Professor