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cp -arL /etc /tmp/etc.backup

Posted on 2011-02-26
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what will this command do ?
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Question by:aashee
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by:woolmilkporc
ID: 34988495
Hi,

this command will copy ("cp") recursively ("-R", which is already implied with "-a") the contents of the /etc directory to the /tmp/etc.backup directory.
It will work in archive mode ("-a") which means "recursively" (include subdirectories and files in subdirectories), "do not follow links" (copy the links themselves, not their targets) and preserve all attributes like mode,ownership,timestamps ...

wmp
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woolmilkporc earned 2000 total points
ID: 34988703
Seems I overlooked the option "-L" in your post.

No wonder, because it's contradictory to "-a",

"-a" implies " --no-dereference" , which means "don't follow symbolic links", whereas "-L" is the same as "--dereference", which means "always follow symbolic links" (= create real files instead of links).

As the last entered option takes precedence the command you posted will copy files instead of their links. You will have to decide whether this is the desired behavior.

wmp


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