Could someone tell me how to perform calculations using numbers greater than 2150000000 in Korn Shell? When I tried to do it it gave me the wrong answer.
e.g. I have a ksh file with the contents below:
---------------------------------
#!/bin/ksh
SUM=`expr 2150000000 + 2`
PRODUCT=`expr... (3 Replies)
Hi,
I have a sh script which contains the following line
TOTAL=$((e4-s4)) -> Where e4 and s4 are input got from the user.
At the time of execution of this line the following error occurs
test.sh: syntax error at line 8: `TOTAL=$' unexpected
How to solve this issue?. Can any... (9 Replies)
Hi all,
I just learnt Perl and I encountered a problem in my current project.
For a verilog file, i am required to write a PERL script that could match pattern to output nitrolink and nitropack. I wont know what name to grep except the pattern below.
the verilog file:
nitrolink nitrolink... (1 Reply)
Hi:
Let's suppose I want to replace all the | by > ONLY when | is between . Usually (and it works) I would do something like
sed -e 's/\(\*\)|\(*\]\)/\1>\2/g'
where I have to "save" some portions of the matched region and use them with the \n metacharacter. I was wondering if I could... (2 Replies)
hi dudes, I nee you kind assistance, I have to find the matched numbers from 2 text files and output of matched numbers should be in another text file..
I do have text files like this , for example
File 1
787
665*5-p
5454
545-p
445-p
5454*-p
File 2
5455
787
445-p
4356
2445
144
... (3 Replies)
Hello Guyz
I have been following this forum for a while and the solutions provided are super useful. I currently have a scenario where i need to search for a pattern and start searching by keeping the first pattern as a baseline
ABC
DEF
LMN
EFG
HIJ
LMN
OPQ
In the above text i need to... (8 Replies)
Florida State University, Tallahassee, FL, USA, Dr. Whalley, COP4342 Unix Tools.
This program takes much of my previous assignment but adds the functionality of printing the concatenated line numbers found within the input.
Sample input from <> operator:
Hello World
This is hello
a sample... (2 Replies)
Hello every,
I am stuck in a problem. I have file like this. I want to add the fifth field of the match pattern line above the lines starting with "# @D". The delimiter is "|"
eg
>
# @D0.00016870300|0.05501020000|12876|12934|3||Qp||Pleistocene||"3 Qp Pleistocene"|Q
# @P... (5 Replies)
Hi,
I have two files file1.txt and file2.txt. Please see the attachments.
In file2.txt (which actually is a diff output between two versions of file1.txt.), I extract the pattern corresponding to 1172c1172. Now ,In file1.txt I have to search for this pattern 1172c1172 and if found, I have to... (9 Replies)
Hi,
I am trying to extract data based on certain conditions. My sample input file as below:-
lnc-2:1 OnePiece tra_law 500 688 1 . . g_id "R792.8417"# tra_law_id "R792.8417.1"# g_line "2.711647"# KM "8.723820"#
lnc-2:1 OnePiece room 500 510 1 . . g_id "R792.8417"# tra_law_id "R792.8417.1"#... (7 Replies)
Discussion started by: bunny_merah19
7 Replies
LEARN ABOUT CENTOS
tpm_quote_tools
TPM QUOTE TOOLS(8) TPM QUOTE TOOLS(8)NAME
TPM Quote Tools
PROGRAMS
tpm_mkuuid, tpm_mkaik, tpm_loadkey, tpm_unloadkey, tpm_getpcrhash, tpm_updatepcrhash, tpm_getquote, tpm_verifyquote
DESCRIPTION
TPM Quote Tools is a collection of programs that provide support for TPM based attestation using the TPM quote operation.
A TPM contains a set of Platform Configuration Registers (PCRs). In a well configured machine, some of these registers are set to known
values during the boot up process or at other times. For example, a PCR might contain the hash of a boot loader in memory before it is
run.
The TPM quote operation is used to authoritatively verify the contents of a TPM's Platform Configuration Registers (PCRs). During provi-
sioning, a composite hash of a selected set of PCRs is computed. The TPM quote operation produces a composite hash that can be compared
with the one computed while provisioning.
To use the TPM quote operation, keys must be generated. During provisioning, an Attestation Identity Key (AIK) is generated for each TPM,
and the public part of the key is made available to entities that validate quotes.
The TPM quote operation returns signed data and a signature. The data that is signed contains the PCRs selected for the operation, the
composite hash for the selected PCRs, and a nonce provided as input, and used to prevent replay attacks. At provisioning time, the data
that is signed is stored, not just the composite hash. The signature is discarded.
An entity that wishes to evaluate a machine generates a nonce, and sends it along with the set of PCR used to generate the composite PCR
hash at provisioning time. For this use of the TPM quote operation, the signed data is ignored, and the signature returned is used to val-
idate the state of the TPM's PCRs. Given the signature, the evaluating entity replaces the nonce in the signed data generated at provi-
sioning time, and checks to see if the signature is valid for the data. If so, this check ensures the selected PCRs contain values that
match the ones measured during provisioning.
A typical scenario for an enterprise using these tools follows. The tools expect AIKs to be referenced via one enterprise-wide Universally
Unique Identifier (UUID). The program tpm_mkuuid creates one.
For each machine being checked, an AIK is created using tpm_mkaik. The key blob produced is bound to the UUID on its machine using
tpm_loadkey. The public key associated with the AIK is sent to the entities that verify quotes. Finally, the expected PCR composite hash
is obtained using tpm_getpcrhash. When the expected PCR values change, a new hash can be generated with tpm_updatepcrhash.
The program to obtain a quote, and thus measure the current state of the PCRs is tpm_getquote. The program that verifies the quote
describes the same PCR composite hash as was measured initially is tpm_verifyquote.
SEE ALSO tpm_mkuuid(8), tpm_mkaik(8), tpm_loadkey(8), tpm_unloadkey(8), tpm_getpcrhash(8), tpm_updatepcrhash(8), tpm_getquote(8), tpm_verifyquote(8)
Oct 2010 TPM QUOTE TOOLS(8)