On 2007-09-24 20:52, Gary Kline <[EMAIL PROTECTED]> wrote: >On Mon, Sep 24, 2007 at 11:07:20PM -0400, Howard Goldstein wrote: >>> # delete the last 10 lines of a file >>> sed -e :a -e '$d;N;2,10ba' -e 'P;D' # method 1 >>> sed -n -e :a -e '1,10!{P;N;D;};N;ba' # method 2 >>> >>> Question two, can sed do its thing inline? >> >> Wouldn't it be easier to use head -n 18 ?
If you _know_ that the file has 28 lines, yes. If you don't, then itmay be tricky to 'guess' that -n 18 is the right option. > No, because most of these files are between 40 and 50 lines. I only > care about the first 30 or 40; everything below has to be deleted. By > hand, using vi, I might type :31,$d that fixes that one file. Of > course, I could simply edit in "19" for "10" above. It would be more > savvy to understand the sed syntax. You don't need to manually edit files with vi(1) if all you want to do is type ``:31,$d<RET>:wq<RET>'' ... sed -i '' -e '31,$d' file.txt _______________________________________________ freebsd-questions@freebsd.org mailing list http://lists.freebsd.org/mailman/listinfo/freebsd-questions To unsubscribe, send any mail to "[EMAIL PROTECTED]"