I am really lost I don't know what this line does. Please help I'm very lost. Thanks in advance.
cat CPROGRAMS.c
|sed 's// /g'|tr ' ' '\012'
|grep ''
|sed 's/^*/ /'
|grep '($'|sort -u|tr -d "("` (4 Replies)
OK, I am trying to become more familiar with grep and sed.
I have a file that is storing some records. I am allowing a user to
search for a keyword in the file with this:
grep -i "$keyword" testFile|sed -n -e 's/^/\
/' -e 's/:/\
/gp'
... (15 Replies)
I have a file that contains many instances of double dollar signs. I want to use sed to get the first occurrence. for example, given the following data.
#Beginning of file
AB
34
$$
AB
$$
AB
98
$$
I only want to pull out:
AB
34
$$ (1 Reply)
Hi All,
I have created a bourne script that basically wants to split a file up in to different parts. I have this working if the file has all the information on different lines but if it doesn't then it doesn't work.
i.e.
If this is the file
hello
12345
good bye
6789
I could grep all the... (5 Replies)
HI all,
i have a line in a file it contains
Code:
one;two_1_10;two_2_10;two_3_10;three~
now i need to get the output as
Code:
one;two_1_abc_10;two_2_abc_10;two_3_abc_10;three~ ( 1 should be replaced with 1_abc for two__abc_10 , and one more thing the number of occurances of... (6 Replies)
So I have a html file with a bunch of words inside tags and I need to extract just the words, and I'm not sure exactly what the best way to do this is. The format is as follows:
<tr>
<td>word 1</td>
<td>word 2</td>
</tr>
And all I want to extract is the 'word 2'. First I tried... (3 Replies)
I am stranded with a problem. Please solve.
How will you remove blank lines from a file using sed and grep? ( blank line contains nothing or only white spaces).
I run the below commands of sed and grep but grep isn't giving output as desired. Why?
sed '/^*$/d' blank
grep -v "^*$" blank... (3 Replies)
Hi,
I have a file with reoccurring patterns and I want extract the 3rd line after the match, then delete another pattern from that third line.
For example the file is in the following format:
Hello
Name: Abc
Number: 123
Hello
Name: FQE
Number: 543
This occurs more than 100... (4 Replies)
Hello Everyone!
I'm kind of new to parsing and would like extract a partial part of my nmap scan output so I can convert it to csv/excel:
My current file has two types of lines like this:
Nmap scan report for dns1 (1.1.1.1)
Nmap scan report for dns2 (2.2.2.2)
Nmap scan report for 3.3.3.3
... (3 Replies)
Hi ,
I have a file where i have modifed certain things compared to original file . The difference of the original file and modified file is as follows.
# diff mir_lex.c.modified mir_lex.c.orig
3209c3209
< if(yy_current_buffer -> yy_is_our_buffer == 0) {
---
>... (5 Replies)
Discussion started by: breezevinay
5 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)