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Full Discussion: how to sed in this case
Top Forums Shell Programming and Scripting how to sed in this case Post 302135999 by robotronic on Friday 14th of September 2007 02:52:04 AM
Old 09-14-2007
Basically, in the awk script, all the work is done by the printf function. Awk is needed only to split the string in three separate variables, using the colon as delimiter.
I suggest you a "man printf" and "man formats", because this function is very powerful and can accept a large amount of string format specification. In our case, we need to print left padded numbers with zeroes, two characters as total length. You achieve this with the format string "%02d", where "d" represents an integer, "0" is the padding character and 2 is the length.
 

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LEARN ABOUT DEBIAN

tpm_changeownerauth

tpm_changeownerauth(8)					      System Manager's Manual					    tpm_changeownerauth(8)

						       TPM Management - tpm_changeownerauth

NAME

       tpm_changeownerauth - change the authorization data associated with the owner or SRK

SYNOPSIS

       tpm_changeownerauth [OPTION]

DESCRIPTION

       tpm_changeownerauth allows for changing the authorization data for the TPM owner or the TPM's Storage Root Key (via the TPM_ChangeAuthOwner
       API).  This operation prompts for current password, followed by the new password and a confirmation of the new password. The --owner option
       changes the TPM owner password and --srk option changes the TPM's SRK password. The --well-known option is used when SRK or owner passwords
       need to be changed and current owner password is a secret of zeros, --set-well-known option changes current password to a secret of zeros,
       both options do not work by themselves, they must be used with --owner and --srk options to indicate which of these passwords will be
       changed.

       -h, --help
	      Display command usage info.

       -v, --version
	      Display command version info.

       -l, --log [none|error|info|debug]
	      Set logging level.

       -u, --unicode
	      Use TSS UNICODE encoding for passwords to comply with applications using TSS popup boxes

       -o, --owner
	      Change the authorization data for the TPM owner.

       -s, --srk
	      Change the authorization data for the TPM's Storage Root Key.

       -g, --original_password_unicode
	      Use TSS UNICODE encoding for original password to comply with applications using TSS popup boxes

       -n, --new_password_unicode
	      Use TSS UNICODE encoding for new password to comply with applications using TSS popup boxes

       -z, --well-known
	      Change password to a new one when current owner password is a secret of all zeros (20 bytes of zeros). It must be specified which
	      password (owner, SRK or both) to change

       -r, --set-well-known
	      Change password to a secret of all zeros (20 bytes of zeros). It must be specified which password (owner, SRK or both) to change

       SEE ALSO

       tpm_version(1), tpm_takeownership(8), tcsd(8)

REPORTING BUGS

       Report bugs to <trousers-users@lists.sourceforge.net>

TPM Management							    2005-05-06						    tpm_changeownerauth(8)
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