问题
I am trying to copy part of a .txt file from the line number n to the line number n+y (let's say 1000 to 1000000).
I tried with operators and sed, and it failed. Here's the command I tried:
sed -n "1000, 1000000p" path/first/file > path/second/file
回答1:
if you know how many lines are in your source file (wc -l) you can do this .. assume 12000 lines and you want lines 2000 - 7000 in your new file (total of 5000 lines).
cat myfile | tail -10000 | head -5000 > newfile
Read the last 10k lines, then read the 1st 5k lines from that.
回答2:
sed command should work fine, replace double quotes with single quotes.
sed -n '1000, 1000000p' path/first/file > path/second/file
来源：https://stackoverflow.com/questions/9259658/copy-paste-part-of-a-file-into-another-file-using-terminal-or-shell