What does this command format mean?
 

Hi,

Can anyone tell me what does the following linux command format mean ?

Thanks,

ls -l 1>> | grep foo 1<< 2>> | less 2<< | grep goo 2<< >out

Some resources to help you figure this out:

http://mywiki.wooledge.org/BashGuide
http://mywiki.wooledge.org/BashFAQ
http://wiki.bash-hackers.org/start
http://tldp.org/LDP/abs/html/

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