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Command to display first few and last few lines of a file

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linux-howto

http://unix.stackexchange.com – I have a file with many rows, and each row has a timestamp at the starting, like [Thread-3] (21/09/12 06:17:38:672) logged message from code..... So, I frequently check 2 things from this log file. First few rows, that has the global conditions and start time is also given. Last few rows, that has the exit status with some other info. Is there any quick handy single command that could let me display just the first and last few lines of a file? Please let me know. (HowTos)