Here is a snapshot of reading KB event6 in Ubuntu 16.04 64 bit...
It is in /dev/input/ ...
As I quoted in most Linux flavours reading is easy, understanding the protocol is NOT!
As you can see with this snapshot of the 'Ubuntu Terminal', to run it from the '/dev/input/' directory requires 'sudo'... sudo cat event6
Note there were only 3 keys pressed and 1 combination of keys...
Now see how difficult it is to monitor any KB knowing its device, just think how difficult it is if you have disabled said KB and required data from it.
Hello, I'm new here and I come from Germany.
At our AIX-ORACLE-System someone has deleted one important file and we'd like to find out who did this, next time.
Is there any command to find out who is connected?
I'm not trying to find out if it's root, etc., I'd like to get the DNS-Name or... (3 Replies)
Hello !
I've got a question . I really don't het this point. Let's supose that I have a client connected to a server.
I want the server IMEDIATLY know if the client is diconnected . How can I realize this ? :mad:
Amd I'm just curios about one thing. I have a server and multiple clients... (3 Replies)
hi...
can anyone pls suggest a few methods to check whether a computer is connected to any network, using the terminal, not GUI.
thanks
eskay (1 Reply)
we have a as400 5rev4 and want to use a rhel server to use as a file server. We exported a drive on the rhel box and then mounted it on the as400. We can see the top directory in our mounted as400 directory but when we attempt access subdirectories we get a no matching object error.
When we open... (2 Replies)
Hello everyone.
We have a environment where we have DS8K storage and ES800 storage, the way to check to which storage the box is connected is using the LUN ID I get frm " pcmpath query device " command.
for ex:
75CXX - DS8K storage
26860 - ES 800 Storage
I was told to check... (4 Replies)
Be Gentle folks, I am a baby OpenSuSe 11.2 user :-)
In windows Vista, there is a world in the systray when you are Internet connected and not just local.
I have searched all over for a .RPM for the Network Manager or another packeg in Suse that can show me the same thing or something close.
... (0 Replies)
Hi all
I've been a Debian user since solidly since about 1997 so I'm fairly experienced Linux user as a whole but unfortunately the monoculture has hit be hard recently. I'm working off a Laptop a lot of the time which spends up to 2-4 weeks without an Internet connection. A few weeks ago it... (1 Reply)
hi,
good morning.
Anyone can help me out. A trying to ftp from server A to server B.
from server A to B its working fine but from server B to A, its only showing connected only:
finap7 #ftp 10.10.10.210
Connected to 10.10.10.210.
I refresh the inetd but nothing is happening.
Please... (1 Reply)
Been a while since I've been here; I have my iMac and MBpro connected via firewire, and they can see each other when I open the finder windows.
But I'd like to be able to 'see' each computer on the other via the terminal application; and I can't see them right now. I can transfer files via the... (0 Replies)
May someone can answer this. Anytime I ignite my laptop to go online I see via etherape that I am connected to IANA as shown below. Is my provider redirecting me there, the cable under the sea, what is the reason for this?
This happened with a pretty normal desktop PC, as well with my ancient... (2 Replies)
Discussion started by: 1in10
2 Replies
LEARN ABOUT OPENSOLARIS
urandom
random(7D) Devices random(7D)NAME
random, urandom - Strong random number generator device
SYNOPSIS
/dev/random
/dev/urandom
DESCRIPTION
The /dev/random and /dev/urandom files are special files that are a source for random bytes generated by the kernel random number generator
device. The /dev/random and /dev/urandom files are suitable for applications requiring high quality random numbers for cryptographic pur-
poses.
The generator device produces random numbers from data and devices available to the kernel and estimates the amount of randomness (or
"entropy") collected from these sources. The entropy level determines the amount of high quality random numbers that are produced at a
given time.
Applications retrieve random bytes by reading /dev/random or /dev/urandom. The /dev/random interface returns random bytes only when suffi-
cient amount of entropy has been collected. If there is no entropy to produce the requested number of bytes, /dev/random blocks until more
entropy can be obtained. Non-blocking I/O mode can be used to disable the blocking behavior. The /dev/random interface also supports
poll(2). Note that using poll(2) will not increase the speed at which random numbers can be read.
Bytes retrieved from /dev/random provide the highest quality random numbers produced by the generator, and can be used to generate long
term keys and other high value keying material.
The /dev/urandom interface returns bytes regardless of the amount of entropy available. It does not block on a read request due to lack of
entropy. While bytes produced by the /dev/urandom interface are of lower quality than bytes produced by /dev/random, they are nonetheless
suitable for less demanding and shorter term cryptographic uses such as short term session keys, paddings, and challenge strings.
Data can be written to /dev/random and /dev/urandom. Data written to either special file is added to the generator's internal state. Data
that is difficult to predict by other users may contribute randomness to the generator state and help improve the quality of future gener-
ated random numbers.
/dev/random collects entropy from providers that are registered with the kernel-level cryptographic framework and implement random number
generation routines. The cryptoadm(1M) utility allows an administrator to configure which providers will be used with /dev/random.
ERRORS
EAGAIN O_NDELAY or O_NONBLOCK was set and no random bytes are available for reading from /dev/random.
EINTR A signal was caught while reading and no data was transferred.
ENOXIO open(2) request failed on /dev/random because no entropy provider is available.
FILES
/dev/random
/dev/urandom
ATTRIBUTES
See attributes(5) for descriptions of the following attributes:
+-----------------------------+-----------------------------+
| ATTRIBUTE TYPE | ATTRIBUTE VALUE |
+-----------------------------+-----------------------------+
|Availability | SUNWcsr |
|Interface Stability |Evolving |
+-----------------------------+-----------------------------+
SEE ALSO cryptoadm(1M), open(2), poll(2), attributes(5)NOTES
/dev/random can be configured to use only the hardware-based providers registered with the kernel-level cryptographic framework by dis-
abling the software-based provider using cryptoadm(1M). You can also use cryptoadm(1M) to obtain the name of the software-based provider.
Because no entropy is available, disabling all randomness providers causes read(2) and poll(2) on /dev/random to block indefinitely and
results in a warning message being logged and displayed on the system console. However, read(2) and poll(2) on /dev/urandom continue to
work in this case.
An implementation of the /dev/random and /dev/urandom kernel-based random number generator first appeared in Linux 1.3.30.
A /dev/random interface for Solaris first appeared as part of the CryptoRand implementation.
SunOS 5.11 1 Sep 2008 random(7D)