Which optins should I use to back up files

04/11/2007, 04h05

Hi,
I want to back up many files using gnu tar. I used -p to reserve the
user previlidge property. Do you mind to tell me that is there any other
special options should I take to make a better tar file? Thanks !

Regards!
Bo

04/11/2007, 08h24

Bo Yang wrote:
>
> I want to back up many files using gnu tar. I used -p to reserve the
> user previlidge property. Do you mind to tell me that is there any other
> special options should I take to make a better tar file? Thanks !

[GNU tar]

"--create" and "--verify" is adequate. If you want a POSIX compliant
archive "--format=posix".

You need "-p" only when you _extract_ files and you are not user root.

--
Best regards | Be nice to America or they'll bring democracy to
Cyrus | your country.

05/11/2007, 13h58

Cyrus Kriticos :
> Bo Yang wrote:
>>
>> I want to back up many files using gnu tar. I used -p to reserve the
>> user previlidge property. Do you mind to tell me that is there any
>> other special options should I take to make a better tar file? Thanks !
>
> [GNU tar]
>
> "--create" and "--verify" is adequate. If you want a POSIX compliant
> archive "--format=posix".
>
> You need "-p" only when you _extract_ files and you are not user root.
>

Thank you very much!

Regards!
Bo

05/11/2007, 16h47

Bo Yang wrote:
> Hi,
> I want to back up many files using gnu tar. I used -p to reserve the
> user previlidge property. Do you mind to tell me that is there any other
> special options should I take to make a better tar file? Thanks !
>
> Regards!
> Bo

Note that tar doesn't by default backup ext[234] attributes, nor
any extended attributes (including selinux labels). Try using
"--xattrs" to back that stuff up as well.

-Wayne

05/11/2007, 22h26

Wayne wrote:
> Bo Yang wrote:
>> Hi,
>> I want to back up many files using gnu tar. I used -p to reserve the
>> user previlidge property. Do you mind to tell me that is there any other
>> special options should I take to make a better tar file? Thanks !
>>
>> Regards!
>> Bo
>
> Note that tar doesn't by default backup ext[234] attributes, nor
> any extended attributes (including selinux labels). Try using
> "--xattrs" to back that stuff up as well.
>
> -Wayne

Actually, a quick check of Gnu tar 1.15.1 shows it doesn't backup/restore
ACLs and EAs correctly. You should use "star" instead:

$ star -cv f=dir.tar --acl --xattr --xfflags artype=exustar dir

Which backups up everything in directory dir, including ACLs, EAs, and
any ext[234] attributes, to the archive "dir.tar". To restore:

$ star -xvp --acl --xattr --xfflags f=dir.tar

-Wayne

04/11/2007, 04h05	#1
Bo Yang Messages: n/a Hébergeur:	Which optins should I use to back up files Hi, I want to back up many files using gnu tar. I used -p to reserve the user previlidge property. Do you mind to tell me that is there any other special options should I take to make a better tar file? Thanks ! Regards! Bo

04/11/2007, 08h24	#2
Cyrus Kriticos Messages: n/a Hébergeur:	Re: Which optins should I use to back up files Bo Yang wrote: > > I want to back up many files using gnu tar. I used -p to reserve the > user previlidge property. Do you mind to tell me that is there any other > special options should I take to make a better tar file? Thanks ! [GNU tar] "--create" and "--verify" is adequate. If you want a POSIX compliant archive "--format=posix". You need "-p" only when you _extract_ files and you are not user root. -- Best regards \| Be nice to America or they'll bring democracy to Cyrus \| your country.

05/11/2007, 13h58	#3
Bo Yang Messages: n/a Hébergeur:	Re: Which optins should I use to back up files Cyrus Kriticos : > Bo Yang wrote: >> >> I want to back up many files using gnu tar. I used -p to reserve the >> user previlidge property. Do you mind to tell me that is there any >> other special options should I take to make a better tar file? Thanks ! > > [GNU tar] > > "--create" and "--verify" is adequate. If you want a POSIX compliant > archive "--format=posix". > > You need "-p" only when you _extract_ files and you are not user root. > Thank you very much! Regards! Bo

05/11/2007, 16h47	#4
Wayne Messages: n/a Hébergeur:	Re: Which optins should I use to back up files Bo Yang wrote: > Hi, > I want to back up many files using gnu tar. I used -p to reserve the > user previlidge property. Do you mind to tell me that is there any other > special options should I take to make a better tar file? Thanks ! > > Regards! > Bo Note that tar doesn't by default backup ext[234] attributes, nor any extended attributes (including selinux labels). Try using "--xattrs" to back that stuff up as well. -Wayne

05/11/2007, 22h26	#5
Wayne Messages: n/a Hébergeur:	Re: Which optins should I use to back up files Wayne wrote: > Bo Yang wrote: >> Hi, >> I want to back up many files using gnu tar. I used -p to reserve the >> user previlidge property. Do you mind to tell me that is there any other >> special options should I take to make a better tar file? Thanks ! >> >> Regards! >> Bo > > Note that tar doesn't by default backup ext[234] attributes, nor > any extended attributes (including selinux labels). Try using > "--xattrs" to back that stuff up as well. > > -Wayne Actually, a quick check of Gnu tar 1.15.1 shows it doesn't backup/restore ACLs and EAs correctly. You should use "star" instead: $ star -cv f=dir.tar --acl --xattr --xfflags artype=exustar dir Which backups up everything in directory dir, including ACLs, EAs, and any ext[234] attributes, to the archive "dir.tar". To restore: $ star -xvp --acl --xattr --xfflags f=dir.tar -Wayne

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