Questions tagged [verification]

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Test driver for developing USB Devices?

I've recently finished up Linux Device Drivers and have had moderate success writing the device (as opposed to host) side code for a dev board. For most applications, indeed almost all applications in ...
fisherdog1's user avatar
1 vote
0 answers
44 views

How to verify CAN interfaces with Linux?

I want to verify the CAN interfaces on my embedded system. It has two can ports: can0 and can1. I bring them both up with the following sequence: # ip link set can0 type can bitrate 1000000 dbitrate ...
mistyron's user avatar
-1 votes
1 answer
77 views

How to make Linux installation verifiable/auditable?

A major goal of open source is being able to audit/verify the software you run. But the moment we use that software hosted by a third-party we need to trust them.. If I ran an OSS service on a Linux ...
ln3xp's user avatar
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0 votes
2 answers
83 views

How to properly setup a verified mail signature?

I've renewed and imported my old self-generated GPG certificate. After setting the new expiration date I've uploaded my cert using gpg --keyserver pgp.mit.edu --send-keys <key id> Receiving a ...
Pinke Helga's user avatar
0 votes
1 answer
149 views

How can suppress the warning info when to verify apache?

Warning info "This key is not certified with a trusted signature!" when to verify apache : wget https://downloads.apache.org/accumulo/1.10.2/accumulo-1.10.2-bin.tar.gz wget https://downloads....
showkey's user avatar
  • 99
2 votes
1 answer
2k views

How to verify fstab concisely?

I have been using the following command so far to verify my /etc/fstab: sudo findmnt --verify Unfortunately, it spills out warnings for each unreachable disk (which I don't care about) and I have not ...
xeruf's user avatar
  • 501
1 vote
0 answers
427 views

Checksum or validate .tar file contents with directory in shell

Scenario: Using Linux shell to back up a directory of many sub files and compressing the data with ‘tar -cvpJf filename.tar /savedir/’. Goal: Using shell — checksum or validate the newly created ‘.tar’...
CosmicFiasco's user avatar
2 votes
1 answer
5k views

How do I verify the certificate of a specific computer when the DNS gives me one of many IP addresses?

I have a cloud setup with 6 front end computers using Apache. I installed a new SSL certificate. Now I want to verify that all the machines have the certificate. The problem is if I just use https://...
Alexis Wilke's user avatar
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0 votes
0 answers
85 views

How dangerous is it to allow a "sandboxed" program to write anywhere in virtual memory?

This is a question about the interaction between a process and the linux kernel. This is in the context of a formal proof, so the setting may seem a bit weird. Suppose I have a program, loaded from an ...
Mario Carneiro's user avatar
1 vote
1 answer
908 views

Verify password of current user, even when it’s root

Is there a simple command to verify the password of the current user? The command $ su -c true $(id -nu) suffices for non-root users. However a root user doesn’t need to verify his identity when ...
k.stm's user avatar
  • 689
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0 answers
576 views

How can I validate the integrity of a torrent retrieved through DHT?

I've just downloaded a dataset made available through BitTorrent and (at length) transferred it to my home PC. Now I want to validate that nothing's been corrupted along the way. Unfortunately, the ...
i336_'s user avatar
  • 1,007
-1 votes
1 answer
99 views

SATA drive validation

I am trying to validate a drive that supports secure erase in multiple formats. The format is specified in a vendor specific ATA-8 packet. Our technician has solved the issue quite ingeniously by ...
Brian Stark's user avatar
0 votes
2 answers
140 views

Copying files, verifying and then zipping with a shell script

I am looking to create a script - a linux or a python scrip so that it can create the following things for me as well as Verify the files for me which are copied from a folder. I Have two folders: ...
mywayz's user avatar
  • 51
0 votes
1 answer
2k views

How to import pgp keys from a search on an keyserver using curl?

Is there a standard method for searching and importing a pgp key using curl or wget? I was going through verifying the download with a gpg signed shasum256 file and encountered the problem of trying ...
placid chat's user avatar
1 vote
1 answer
372 views

PureOS verification of download

PureOS has SHA256 verification of download, but I've heard that SHA isn't so secure. Do they sign their files or provide associated .sig files? And is it true that that would be more secure?
Anon's user avatar
  • 11
1 vote
1 answer
260 views

Verification of packages in a local mirror

Packages for several BSD and Linux operating systems / distributions are downloaded over a potentially insecure connecting or are later on replaced with a malicious version on the local disk. The ...
user6756's user avatar
1 vote
1 answer
2k views

What happened to elfsign and elfverify?

In "Uninformed Research -- informative information for the uninformed." 2003 mentions a tool called elfsign and elfverify. This is a tool to checksum and sign an ELF binary. I can't find that tool in ...
Evan Carroll's user avatar
2 votes
0 answers
2k views

How do I verify linux kernel signature with gpg?

Following the notes at the kernel.org site, but I cannot seem to verify the signature of the kernel. I tried to use the given script to handle it for me, but that has failed too. user@localhost ~ $ ...
Jon's user avatar
  • 495
1 vote
2 answers
500 views

How do I verify https://files.devuan.org/devuan-devs.gpg

I am running Devuan Jessie. I want to install another Devuan Ascii from scratch. So I downloaded: https://files.devuan.org/devuan_ascii/installer-iso/devuan_ascii_2.0.0_amd64_netinst.iso https://...
Tino's user avatar
  • 1,112
0 votes
2 answers
74 views

One line read verification [closed]

I have this read operation: read -p "Please enter your name:" username How could I verify the users name, in one line? If it's not possible in a sane way in one line, maybe a Bash function putted ...
Arcticooling's user avatar
-2 votes
1 answer
375 views

How to check email mailbox in min time?

I am trying to verify emails which is over 70 lac. I am using the this script But it is taking approx 2-3 min for one email. Since I try other code, but all are using the same method. So I am ...
Ankur_009's user avatar
  • 101
0 votes
3 answers
1k views

Is there a `cp` like command for verifying data and removing files?

I have some photo files on my phone, and I am backing them up to an external drive. (Everything is mounted on a linux laptop.) I have copied the files, when I should really have mv'ed them. However, ...
user3728501's user avatar
4 votes
2 answers
7k views

How to checksum a CD/DVD? (to verify integrity of my Debian installation)

So I'd like to checksum my Debian 9.0 installation DVD to be able to compare it to the respective .iso file's hashes and the published hashes to be able to verify my installation's integrity. I ...
mYnDstrEAm's user avatar
  • 4,068
22 votes
5 answers
14k views

Does dd do any kind of verification?

I'm using dd to copy data from an old hard drive to a new one. I want to be sure that the data's integrity is secure. On this answer, Gilles says If [dd] terminated successfully, then the backup ...
Sparhawk's user avatar
  • 19.6k
1 vote
2 answers
3k views

Will apt-get dist-upgrade -y confirm updates with verification issues?

I would like to have chron run my updates periodically and I have been told that the command: apt-get dist-upgrade -y should accept the updates. My concern is that numerous times when manually ...
John Grunt's user avatar
4 votes
0 answers
2k views

Should [email protected] be a valid email address?

Our postfix setup uses recipient address verification. Obviously, postfix uses a special email address for this process, defined right here. $ /usr/sbin/postconf | grep double_bounce_sender ...
Jürgen Gmach's user avatar
3 votes
2 answers
4k views

Stunnel: How to ignore the cert expiry date

I would like to setup stunnel but the certificate from my other tunnel is expired. How would I tell stunnel to ignore verification of expiry date of the certificate coming from stunnel client mode to ...
Mark Shine's user avatar
14 votes
3 answers
15k views

How to check if a video is completely downloaded?

I have a bunch of videos which I want to check if they are complete or not. Some of them may be downloaded partially, but they are not faulty. How can I efficiently check if these video are completely ...
Ho1's user avatar
  • 2,564
4 votes
1 answer
101 views

LXC: Are downloaded templates verified?

Debian 8.3, LXC 1:1.0.6-6+deb8u2 When LXC downloads the base packages for a Debian container, are the packages verified? Verifying a Debian CD involves comparing signed checksum files against the ...
Toby's user avatar
  • 187
3 votes
1 answer
3k views

How to verify debian cds with gpg?

I have downloaded Debian installation iso from http://cdimage.debian.org/debian-cd/current/amd64/iso-dvd/. I have also downloaded the MD5SUMS and MD5SUMS.sign . I verified the md5sum of iso matches ...
Bharat G's user avatar
  • 506
2 votes
1 answer
407 views

Re-setting perms on RPM's does not seem to work

I am using RPM for file verification. What I do is run rpm -Va to get a list of files that have been changed. Then I run rpm -qf to get the package name the file belongs to. Finally I run rpm -...
user53029's user avatar
  • 2,725
3 votes
1 answer
1k views

Generate SFV file, optimizing hard links

I'm currently running cfv -C -rr to generate a SFV file that contains the CRC32 checksums of all files in all subdirectories. The issue is that because there are so many hardlinks, this process is ...
user115746's user avatar
1 vote
2 answers
4k views

Host key verification failed.#015

I am trying to execute a script on a remote computer. Lets call this (Secondary), the script is as follows, for simplicity porposes, #!/bin/bash echo "This is the Remote Machine (Secondary)" > /...
user68650's user avatar
  • 343
1 vote
0 answers
4k views

How to compare file sizes in two directories?

I have copied some files to an SFTP-only server. I want to verify that all the files arrived intact. Since the server is SFTP-only, I cannot run e.g., an MD5sum on the remote host. I have the server ...
JamesTheAwesomeDude's user avatar
2 votes
1 answer
501 views

apt-get update: How to check for GPG errors when using scripts?

When running. sudo apt-get update For example something like this could happen. W: GPG error: http://deb.torproject.org wheezy Release: The following signatures were invalid: KEYEXPIRED 1409325681 ...
adrelanos's user avatar
  • 1,786
3 votes
2 answers
330 views

Identify lines that are out of order

I have a process that generates output mostly in lexicographically sorted order according to a (timestamp) field, but occasionally the lines will be output in the wrong order: 2014-08-14 15:42:02....
ecatmur's user avatar
  • 245
2 votes
1 answer
1k views

How to verify a file automatically over sftp?

I am trying to create a cron job to perform backup of a server over the internet using sftp. But before the actual backup is performed, I would like to verify that the server is connecting to the ...
Question Overflow's user avatar
1 vote
2 answers
3k views

Extract TAR to SD-Card and verify contents afterwards

We currently extract a TAR archive to a SD-Card like this tar xf ${ROOT}/rootfs.tar -C /cynox/${DRIVE}/${TARGET} As a side note: The rootfs.tar contains files for an embedded Linux system. Some of ...
Rev's user avatar
  • 111
1 vote
1 answer
3k views

postfix configuration to verify all recipients

I have a mail server that should receive all mails, even if no user exists. My big problem is the: Postfix Address Verification like mentioned here: http://www.postfix.org/ADDRESS_VERIFICATION_README....
eliStraw's user avatar
4 votes
1 answer
754 views

How to figure out GRUB2's menu output

I have just updated a remote machine which is running Ubuntu Server 12.04. I have only access through SSH and now it's asking for a reboot. I'm guessing a new kernel was installed. I need to make it ...
Savir's user avatar
  • 1,221
0 votes
1 answer
155 views

Cent OS 6.3 Hidden files in shell

I want to be able to check whether a file is hidden or not in Cent OS 6.3. These are often referred to as (dot) files but I can clearly see Cent OS 6.3 handling these by appending a ~(tilde) to the ...
user26676's user avatar
103 votes
7 answers
119k views

Does rsync verify files copied between two local drives?

I want to make a fresh new copy of a large number of files from one local drive to another. I've read that rsync does a checksum comparison of files when sending them to a remote machine over a ...
Frez's user avatar
  • 1,133
13 votes
5 answers
13k views

Is there MD5 (or similar) to a folder? How to verify if two folders are equal?

I'd like to find an md5sum (or similar calculation) of a folder without compressing it into an archive. For example, if in the folder MyFolder we have the files 1.txt, 2.txt and 3.txt, containing: 1....
GarouDan's user avatar
  • 991
1 vote
3 answers
265 views

Tool to remove all non-package files on a system

If you want to keep for example a build or server system clean, it is very useful to be able to check that all files are present and accounted for by the package metadata. At work we have a very nice ...
l0b0's user avatar
  • 50.9k