On Mon, 2004-08-09 at 07:34, Ramprasad A Padmanabhan wrote: > I want to write a command line perl 'script' to delete one or more > lines from a file , by line number
Hi :-) If I understand correctly, you want to delete lines X to Y from a file, right? perl -i -ne 'print unless 1..10' file that should do the trick :-) The explanation follows: -i => in-place edit (you apparently already know what this does -n => for all lines, apply script -e => evaluate the following script print unless 1..10 Well... the '..' operator has been explained every other mail on this list :-| Basically, this one returns true if you're between lines 1 and 10 (inclusive), which means those lines won't get printed, but all others will. HTH, jac PS: If you'd like a more detailed explanation of the .. operator or something else, just say it :-) I'm just not explaining it because you've probably already read about it here... :-) > > for eg in sed I can do the same in two steps > > cat FILENAME | sed -e '1,10d' >FILENAME.TMP > mv FILENAME.TMP FILENAME > > The above mechanism has a lot of pitfalls , like maintaining > permissions , making sure FILENAME.TMP does not already exist etc. > That is why I want to do it with "perl -i " > but I dont want to write a full script for this , because I am going to > run it on remote machines ( automated ) , and I cant ftp the script > everywhere > > Any suggestions > Thanks > Ram -- José Alves de Castro <[EMAIL PROTECTED]> http://natura.di.uminho.pt/~jac
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