[clug] Two (perhaps simple) shell questions.

Andrew Janke a.janke at gmail.com
Tue Aug 18 04:20:45 MDT 2009

On Tue, Aug 18, 2009 at 11:39, Mark Triggs<mark at dishevelled.net> wrote:

>> for i in `ls *.mnc`;
>> do
>>    do8ofthisatonce <program> $i $i.out
>> done
> xargs will do this for you.  Something like:
>  ls *.mnc | xargs -I'{}' -P 8 program {} {}.out

Thanks Mark, I knew that one day I should learn xargs.. ;)  Still
while this will work in most of the things I do xargs doesn't seem to
allow multiple commands?  ie (for arguments sake):

for i in `ls *.mnc`;
    var=`basename $i`
    do8ofthisatonce <program> $var $i.out

If the answer is "can't be done" then so be it. :)  I guess in this
case I could make a quick shell script and call that using xargs but
that sort of spoils the fun.



PS: perl -pe 'chop if !($. % 2)' < myfile   (yes only one less
character but it seemed an obvious start).

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