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Old 09-24-2003, 03:28 AM   #1
myunicom
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Question cp command change the file permission?


I use cp command to backup large file, I find that cp command change the file ower, I want to know whether cp command change the file permission or not.thanks!
 
Old 09-24-2003, 03:46 AM   #2
aizkorri
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it depends on who is copying the files. e .g
If I am userOne and I copy some file from userTwo I became the owner of that copy.
 
Old 09-24-2003, 03:53 AM   #3
whansard
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cp --preserve

when you use cp, you are "creating" a file, so the user
creating it owns it. you can have a default umask that
will set permissions of a file when you create it.
 
Old 09-24-2003, 04:06 AM   #4
myunicom
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Thank you very much!

I(root user) copy a directory(dirA) including many files that have different permission and owner to another directory(dirB).I find that the files owner in dirB are changed to ROOT, I want to know if all the dirB files owner are chaged to ROOT, and the files permission in dirB are changed. I want to copy the dirB files back to the dirA in the future, if the copy change the files owner and permission , it will be a trouble. thanks!

DirA------------------------->DirB (permission,fileowner changed ?)
 
Old 09-24-2003, 04:10 AM   #5
shawnchin
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when using cp to backup files, it is adviceable to use cp -a, a being an option for archive, which will preserve links, permissions, ownerships, and recursively...


Cheers
 
Old 09-24-2003, 04:18 AM   #6
myunicom
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Thank you !

From myunicom
 
Old 09-24-2003, 08:15 AM   #7
whansard
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for backing up
tar clfvzp - directory > /archivename.tar.gz
when extracting
tar zxvfp /archivename.tar.gz --same-owner
 
  


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