To check large files with grep

grep.md

grep commands

To check large files with grep

Get all matches

grep "match" filename.txt

Get count of matches

grep -c "match" filename.txt

Get all matches and save in file

grep "match" filename.txt > savelogs.log

Search from multiple files

grep "match" filename.txt filename2.txt > savelogs.log
OR
grep "match" std{err,debug}.log > savelogs.log

Search matcha and get next n lines

grep -A n "match" filename.txt