Can I view output the entire genome data?
 

Suppose I have a sam file?
Can I use samtools command to get whole genome data?

Thanks.

Could you describe what "whole genome data" means?

If we use samtools, we can select chromosome.
The entire means from chr1 to chr 23.

By default, samtools view will convert the whole .sam file into a .bam. Just don't add a chromosome name to the command line, and you'll get everything.

Can we identify the start and the end position?
I just guess that start from 0 and end with a big number.

If you want the whole thing then don't add start or end positions. From reading the man page, I gather that specifying start and end positions without indicating an actual chromosome would confuse things.

to get everything just:
to get everything and the header:
for .sam, add the sam option
however, if you did want to make selections from the sam:
will grab reads that meet the criteria of being on chr1 between 0 and 1000000 (inclusive)