12-05-2010
Quote:
Originally Posted by
courteous
Hi
ctsgnb,
the "default option" works also without the colon.
I'll sleep a little bit less ignorant tonight
10 More Discussions You Might Find Interesting
1. IP Networking
i need to write a script that can loop through ej.192.162.0.0 to 192.162.0.256
find the ones that are connected and the ones not connected
write the name , ip address and connection status of each one in a file
to later use it in perl to create a web page with the information
thanks guys (1 Reply)
Discussion started by: djbilly
1 Replies
2. Shell Programming and Scripting
need to check on some hosts and send an email if there status changes
I wanna put together a script in bash that will allow me to check the up/down state of a single host via ping
i want it to run in a continuous loop so I can just fire the script and forget about it(dont want cron to drive... (2 Replies)
Discussion started by: zeekblack
2 Replies
3. Shell Programming and Scripting
Hi Gurus
I have a file called /tmp/CMDB which looks like this
serial: 0623AN1208
hostname: server1
model: x4100
assetID: 1234
I am writing a for loop that will go through this file line by line creating a variable of itself. Using the first iteration of the loop (i.e. the first line) as... (6 Replies)
Discussion started by: hcclnoodles
6 Replies
4. Shell Programming and Scripting
I'm trying to understand if it's possible to create a set of variables that are numbered based on another variable (using eval) in a loop, and then call on it before the loop ends.
As an example I've written a script called question (The fist command is to show what is the contents of the... (2 Replies)
Discussion started by: DeCoTwc
2 Replies
5. Shell Programming and Scripting
Hi,
I am using su within a for loop. As you might expect, it prompts for password during each loop execution. Here is my piece of code:
for i in $LIST
do
if
then
DATABASE=`echo $i | awk -F "|" '{ print $1 }'`
USER_ID=`echo $i | awk -F "|" '{ print $2 }'`
su - apstage -c... (1 Reply)
Discussion started by: sugan
1 Replies
6. Shell Programming and Scripting
Hi all
Sorry for the basic question, but i am writing a shell script to get around a slightly flaky binary that ships with one of our servers. This particular utility randomly generates the correct information and could work first time or may work on the 12th or 100th attempt etc !.... (4 Replies)
Discussion started by: rethink
4 Replies
7. Programming
Hi All
i have an issue with ping, we are using dhcp and so if the machine has been offline and i ping it, i get " ping: unknown host <hostname>
is there a way i can stick a loop somewhere so it would keep trying when it got the unknown host error and then when the machine came back online... (2 Replies)
Discussion started by: ab52
2 Replies
8. Shell Programming and Scripting
Hi All,
Below is the very simple code snippet but it si giving me syntax error
#!/bin/bash
#To ensure If JMS directory exists or not
ServerName=$(hostname)
#To ensure If JMS directory exists or not
echo $ServerName
if ;
then
echo "Inside First If"
if ;
then
echo 'JMS... (4 Replies)
Discussion started by: sharsour
4 Replies
9. UNIX for Dummies Questions & Answers
I'm taking a unix class and need to countdown to 0 from whatever number the user inputs. I know how to do this with a while or until loop but using the for loop is throwing me off....
I know I can use an if-then statement in my for loop but can I include a while loop in my for loop? (3 Replies)
Discussion started by: xxhieixx
3 Replies
10. IP Networking
Running 3650 switch. I have this odd issue where I cannot get 4 new Centos 7 boxes pinging out on public IPs (nor pinging in), only gateway .1 and first public IP .2
This is what I see, which doesn't look normal. How do I fix this?
The server itself is configured fine (Centos 7)
# cat... (0 Replies)
Discussion started by: Bashed
0 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)