02-22-2013
sed to replace specific positions on line with file contents
Hi, I am trying to use an awk command to replace specific character positions on a line beginning with 80 with contents of another file.
The line beginning with 80 in file1 is as follows:
Quote:
80................................000000000178800.000010........................
I want to replace the 000000000178800 (positions 34 - 49) on this file with the contents of amended_file_01 -> 000000000206100
The command i am using is:
Quote:
sed '/^80/s/\(^.\{34\}\).\{15\}\(.*\)/\1$amended_file01\2/' file1
The output from this command should be
Quote:
80................................000000000206100.000010........................
But it is returning the filename instead of the file contents
Quote:
80................................$amended_file01.000010........................
How would i get the command to return the file contents instead of the filename?
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
using sed to replace a specific string on a specific line number using variables
this is where i am at
grep -v WARNING output | grep -v spawn | grep -v Passphrase | grep -v Authentication | grep -v '/sbin/tfadmin netguard -C'| grep -v 'NETWORK>' >> output.clean
grep -n Destination... (2 Replies)
Discussion started by: todd.cutting
2 Replies
2. Shell Programming and Scripting
Hello ,
I need to extract data from specific byte positions of a file.
I have tried the below command
awk ' { printf "%s", substr($0, 642363,642369}' filename
to extract data between byte positions
642363 and 642369 .
However I did not get the expected result.
I am new to awk... (6 Replies)
Discussion started by: rmv
6 Replies
3. Shell Programming and Scripting
I am attempting to replace positions 44-46 with YYY if positions 48-50 = XXX.
awk -F "" '{if (substr($0,48,3)=="XXX") $44="YYY"}1' OFS="" $filename > $tempfile
But this is not working, 44-46 is still spaces in my tempfile instead of YYY. Any suggestions would be greatly appreciated. (9 Replies)
Discussion started by: halplessProblem
9 Replies
4. Shell Programming and Scripting
From the existing file, I need to replace specific contents possibly with var every time when the user changes the var.
e.g the contents in the file file.txt is 'My name is $n and I am $y years old' and every time user changed the var outside the file, the contents of the file should be created... (4 Replies)
Discussion started by: Emilywu
4 Replies
5. Shell Programming and Scripting
I'm trying to update a text file via sed/awk, after a lot of searching I still can't find a code snippet that I can get to work.
Brief overview:
I have user input a line to a variable, I then find a specific value in this line 10th field in this case. After asking for new input and doing some... (14 Replies)
Discussion started by: crownedzero
14 Replies
6. Shell Programming and Scripting
my requirement is,
consider a file output
cat output
blah sdjfhjkd jsdfhjksdh
sdfs 23423 sdfsdf sdf"sdfsdf"sdfsdf"""""dsf
hellow there
this doesnt look good
et cetc etc
etcetera
i want to replace a line of line number 4 ("this doesnt look good") with some other line
... (3 Replies)
Discussion started by: vivek d r
3 Replies
7. Shell Programming and Scripting
Hello,
I have two files: file1 and file2
file1 has the following info:
---
host: "localhost"
port: 3000
reporter_type: "zookeeper"
zk_hosts:
- "localhost:2181"
file2 contains an IP address (1.1.1.1)
What I want to do is replace localhost with 1.1.1.1, so that the... (4 Replies)
Discussion started by: Jay Kah
4 Replies
8. Emergency UNIX and Linux Support
Hello,
My input file1 is like this by tab-delimited
chr1 mm10_knownGene stop_codon 3216022 3216024 0.000000 - . gene_id "uc007aeu.1"; transcript_id "uc007aeu.1";
chr1 mm10_knownGene CDS 3216025 3216968 0.000000 - 2 gene_id "uc007aeu.1"; transcript_id "uc007aeu.1"; ... (3 Replies)
Discussion started by: jacobs.smith
3 Replies
9. Shell Programming and Scripting
Hi,
I have a file with hundreds of lines. I want to search for particular lines starting with 4000, search and replace the 137-139 position characters; which will be '000', with '036'. Can all of this be done without opening a temp file and then moving that temp file to the original file name.
... (7 Replies)
Discussion started by: dsid
7 Replies
10. UNIX for Beginners Questions & Answers
I have a fixed-length positional file. I am trying to replace content of position 4-13 (length=10) with xxxxxxxxxx.
Sample 2 rows in this file:
H0187459823 172SMITH, JOE
H0112345678 172DOE, JANE
In this example 87459823 (from 1st line) and 12345678 (from 2nd line) (both in position... (3 Replies)
Discussion started by: Diver181
3 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)