03-23-2014
10 More Discussions You Might Find Interesting
1. Filesystems, Disks and Memory
Once in a while, I would think it advisable to run fsck -y to check the disk.
Should I sign in as su or sudo?
What is the difference and which is preferred?
Thank you in Advance! (4 Replies)
Discussion started by: rpatrick
4 Replies
2. UNIX for Advanced & Expert Users
Hi,
I'm running Red Hat 7.1 on an intel. After re-booting from a system crash, I am probpted to run fsck to repair filesystems manually with no options. For example,
/: UNEXPECTED INCONSISTENCY; RUN fsck MANUALLY.
(ie without -a or -p options)
**Dropping you into a shell.
... (2 Replies)
Discussion started by: Breen
2 Replies
3. Solaris
OS: Solaris 5.8
Everytime I run fsck -y I get: FILE SYSTEM STATE IN SUPERBLOCK IS WRONG; FIX? yes
Do I need to run fsck with the backup superblock option or is there
some other option I should use. I have tried the format->analyze->read
option but that does not report any corrupt blocks.... (5 Replies)
Discussion started by: run_time_error
5 Replies
4. UNIX for Dummies Questions & Answers
I want to use fsck to check and repair my linux system. When I use this command, what do I need to pay attention to or what should I do to make job running successfully. Thanks for your inputs for a newbie. (3 Replies)
Discussion started by: duke0001
3 Replies
5. Solaris
Hi,
Can anybody tell me that is it the command "fsck" can be run by the root account only?
Thanks. (2 Replies)
Discussion started by: efang
2 Replies
6. UNIX for Dummies Questions & Answers
hy guys
I got a ques
I cant acess root, i tried to fsck it, but gets errors to read file systems. What steps do you take to recover the host before you see if there is any data corruption on the root drive?
Regards
Charneet (1 Reply)
Discussion started by: charneet
1 Replies
7. Solaris
Hello
I am getting this in dmesg:
/mount1: unexpected free inode 1262865, run fsck(1M) -o f
What are the options I should use with fsck?
thanks (2 Replies)
Discussion started by: melanie_pfefer
2 Replies
8. UNIX for Dummies Questions & Answers
i want to know what does it mean by doing a consistentcy check fsck on a disk and why journaling filesystems dont need to do it
and what is meant by disk is in a consistent state when writing because entries are recorded in a journal and then to the metadata and then removed from journal (1 Reply)
Discussion started by: farhan_t49
1 Replies
9. UNIX for Dummies Questions & Answers
Hello
I own a SPARC Ultra 10 workstation (standalone) and when issuing the fsck command I get the following output on fs C0t0d0s7:
Phase 1 (checks blocks and sizes):
dada warning: /pci@lf;0/pci@1, 1/ide@3/dad@0,0(dad1): ATA Transport failed:reason, `incomplete'>
Uncorrectable data... (2 Replies)
Discussion started by: tjwops
2 Replies
10. Solaris
What can I fix this issue? I have ran below commands but everything is same.:confused:
WARNING: Last shutdown is later than time on time-of-day chip: check date.
The / file system (/dev/rdsk/c1t0d0s0) is being checked
WARNING - unable to repair the / filesystem. Run fsck manually (fsck -F... (4 Replies)
Discussion started by: getrue
4 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)