I'm trying to analyze an enormous text file (1.6GB), whose data lines look like this:
20090118025859 -2.400000 78.100000 1023.200000 0.000000 20090118025900 -2.500000 78.100000 1023.200000 0.000000 20090118025901 -2.400000 78.100000 1023.200000 0.000000
I don't even know how many lines there are. But I'm trying to split the file by date. The left number is a time stamp (these lines are from 2009, January 18th).
How can I split this file into pieces according to the date?
Everything I know would be to
grep file '20090118*' > data20090118.dat , but there sure is a way to do all the dates at once, right?
The number of entries per date differ, so using
split with a constant number won't work.
Thanks in advance,