viewing specific lines

dakid · #1 (**permalink**) 05-25-2006

hi,

is there any command on viewing specific line number of a file?

thanks

vino · #2 (**permalink**) 05-25-2006

One possible solution is using sed.

If 10 is the line number.

Code:

sed -n "10q;9p" input.txt

dakid · #3 (**permalink**) 05-25-2006

thanks,

what is the relation of the value 10 and 9?
sed -n "10q;9p" input.txt

vino · #4 (**permalink**) 05-25-2006

It is related to performance issues.

Say your file contains 1000 lines, and you need to view line 50. If you give sed -n "50p", then sed would read through the entire 1000 lines, which is a waste. In case of sed -n "51q;50p", sed would read 51 lines, and then print the 50th line.

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