quick unix management arrangement specific lines center file?


trying debug an emanate server wholly record record 20gb record record (with timestamps even! since system.out.println() logging? production?!)



using grep, i've found an area record i'd take feeling at, line 347340107.



other doing something like



head -<$linenum + 10> filename | tail -20


... need head review by initial 347 million lines record file, there discerning easy management dump lines 347340100 - 347340200 (for example) console?



update i totally forgot grep imitation context around review ... works well. thanks!



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