grep

grep commands.

man grep

GREP GREP

Search any line that contains the word bird in filename.

grep "bird" access.log

On multiple files.

grep "bird" access0.log access1.log access2.log

Case-insensitive search.

grep -i "bIrD" access.log

Search with regex.

grep -E "rs=[4-5,0]{3}" access.log

Count match and output sum.

grep -c "rs=500" access.log

Print num lines after match.

grep -A 10 "ERROR" app.log

Print num lines before match.

grep -B 10 "ERROR" app.log

Invert match.

grep -v "rs=200" access.log

Start slaming them pipes ||

grep "pub-k3y-1234-osv" access.log | grep "customerinvoice" | grep "rs=500"

Last modified December 15, 2021: linux (ba38006)