General :: How To Read File In Real Time

Jan 3, 2011

I have a log file that I would like to examine during some changes under process that writes to this log.
Is there some way to open this file and read in real time changes written to it ?

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Programming :: PHP Read File In Real Time

Aug 6, 2007

Is there any way in PHP to read a file, and keep that file open, so that when text is added to a file, it is immediately written to the web page?

Or is this something that needs to be done with Javascript?

I just want to write to a file on my server, and see that output to the web page, without having to refresh the web page.

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General :: Reading Changing File In Real Time

May 27, 2010

I know this command exists I just can't seem to find it. I want to see the last few lines of a file as more are added in real time. Can someone point me in the right direction?

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General :: Real Time File Creation In Terminal?

Aug 2, 2010

I was wondering if there is a command to show a real-time creation of files. I basically executed a command that will created thousands of files and takes a long time. I want to check if it is still creating additional files or if ti got frozen.

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General :: Real-time Sync File Between Machines?

Jul 15, 2010

I have a few servers that are exposed to the internet. When someone tried to brute force hack in to the ssh, ossec adds their IP to the hosts.deny. Then the hacker (read: script kiddie) moves to the next IP up the line and hits my next server, etc, etc.

I end up getting 20 emails for all the servers that they hit.

My question, is there anyway to sync the hosts.deny file across multiple servers so that if they are locked out of one, they are locked out of all?

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Ubuntu Servers :: Setup Real-time (or Near Real-time) Folder Synchronization Among 2+ Servers

Mar 23, 2010

what the recommended way to set up real-time (or near real-time) folder synchronization among 2+ servers. I looked a rsync but that doesn't sound real-time and it looks like its something that you might put in a cron once an hour.

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CentOS 5 :: Real-time File Replication For User Accounts?

Nov 22, 2009

this idea to me right now seems stupid and impractical so I'm also looking for solutions outside of this one. I'm creating a set of highly available servers. They currently utilize pacemaker to manage a shared IP address, apache management, mysql management and also drbd handling. They currently replicate, properly failover and run fine. However, this is a shared web hosting setup and everytime a new user is added to the system a username and password is created and the httpd.conf file is updated for their site. I need a way to replicate those changes to the other server. For httpd.conf I'm pretty sure I can just stick it on the apache drbd resource and create a symbolic link. However, for the passwd and shadow files that is not a realistic solution.

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Software :: Live - Real-time Text-file Updates In Terminal

Jan 13, 2010

I want to have a terminal open and have something like a "repeating cat" command running in it for a certain text file (in particular /var/log/system.log). So my terminal will scan or cat the text file every so often or whenever the text file system.log gets written to by the system, it will display whatever it wrote to the file in my terminal that is open.

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General :: Real Time Processes ?

Dec 7, 2009

I've got the following problem:

1. I start two bash windows

2. In one of them I start a script test1:

Code:

This script puts a natural number 5 times a second.

3. Then in the second bash window I type (as root):

Code:

The script test2 looks as follows:

Code:

While true; do
true;
done

During the following 15 seconds test2 is the process with the highest real-time priority. As far as I know the script doesn't perform any system calls so it shouldn't be suspended even for a minimal timeslice. My question is: why the process test1 manages to put a few numbers on the screen before test2 stops. I thought that test2 would exclusivly own the processor for 15 seconds.

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General :: Why Kernel 2.6 Is Not Real Time

Aug 9, 2008

Since Kernel 2.6 is preemptable, why it is not hard real time OS (without the addition of any patches)? Note: assume we are running a code in Kernel space not userspace.

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General :: Find Real Time Log Name?

Jan 17, 2011

I have to write one Shell script where i have to find one word in current generated log.Log name has specific format like 'NAME_DDMMYY_HHMMSS'.log.Each time i have to go and check the word in newly generated log.How can i pass the newly generated log name in my Script?

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General :: Finding Web Base Real Time Iftop?

Jul 24, 2011

I am looking for web base real time iftop like tool for linux.I mean it shows current active connection on a NIC of any Client that connected to it .I do not want offline data I want realtime data for current connections on web.

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General :: Real Time Info About Disk Activity?

Feb 18, 2011

kernel 2.6.21.5, Slackware 12.0 How can I obtain real time information about disk activity (processes transfering data to/from the hard disk)?

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General :: Check Server Bandwidth Usage In Real Time?

Mar 21, 2010

I'm trying to check my server's bandwidth usage in real time, installed the following programs but none worked so far.

Iptraf - No results even when using iptraf -u
Tcptrack - Error : pcap_loop: cooked-mode frame doesn't have room for sll header
Iftop - No results, everything 0b

Are there any programs that displays bandwidth usage in real time and actually works on VPSes? Or getting real time bandwidth usage on a VPS is simply impossible?

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General :: Install Xenomai On Real-time Kernel (With PREEMPT_RT)?

Sep 8, 2010

install Xenomai on real-time kernel (With PREEMPT_RT)?

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General :: Need To Synchronize Local And Remote Directories In Real Time

May 18, 2010

I'd like to have a copy of a web site on my local drive. Then when I make changes to that copy, have those changes automatically updated on the site's server. Ideally I'd like to tell it to only do this for certain file types. Does anybody know of a way to do this with Linux?

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CentOS 5 Server :: Time On Xen VM's Drifting Ahead Of Real Time?

Aug 4, 2009

I am hosting two Virtual Servers both running Centos 5.3 on a host machine also running the same OS. The VM software in use is Xen, as supplied with the OS.The host machine's time and date is fine, however both Virtual Servers are running ahead of real time consitantly.Running /etc/init.d/ntpd restart will resolve the issue however one of these is running MailScanner and when the time suddenly goes backwards, sometimes by as much as an hour, it stops working properly.

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Software :: Convert Unix Time To 'real' Time

Jan 28, 2010

I used the following command to get the unix time of root user creation:

Code:
awk -F":" '$1 == "root" {print $3}' /etc/shadow
How can i convert this into the date/time of creation?

I am writing a shell script, which determines the OS installation date among other stuff, and i am assuming the root user's account creation date should be a pretty accurate pointer. Are there reasons why i should not be assuming so?I would be open to other suggestion for getting this date/time, but it would nevertheless be interesting to convert the unix time to "real" time without doing complex manual(or otherwise) computation..

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General :: Make Dmesg Post Output To Tty12 In Real Time

Apr 3, 2011

Terminal with real time dmesg output I want to use tty12 for system messages. Is there a way to mirror all kernel messages to there?

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General :: How To Track Elapsed Real-time - Undefined Reference To `clock_gettime'

Jan 28, 2010

What is the best way to track elapsed real-time, for the most kinds of Linux systems?

clock_gettime() looks great, but I get this build error:

undefined reference to `clock_gettime'

..even though I have #include "time.h" Here is my uber-goal:

// Returns fractional seconds that have elapsed since Start_Ticks was set.
float elapsed_seconds( unsigned Start_Ticks )
{

[code]....

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General :: Windows Access The File From Ubuntu Got Read Only Even Though Have A Full Permission To Read, Write And Execute The File?

Feb 4, 2010

What are the possible problem when Windows access the file from Ubuntu got Read Only even though have a full permission to read, write and execute the file? Ubuntu to Ubuntu accessing the file there is no problem only Windows got a problem.

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General :: Enhanced Real Time Clock Support - Missing Kernel Option

Jul 6, 2011

In regards to compiling a custom kernel:

When using make menuconfig - under Device Drivers --> Character Devices --> there should be an option with the label "Enhanced Real Time Clock Support" (CONFIG_JS_RTC).

The problem is that this option seems to only show up while using the menu method when other options are either enabled or disabled and I've entirely forgotten what should be what. I swear fingered it out once.

This is on an older computer (P4) so HPET is no good.

You would think that disabling the HPET option would enable the RTC option but that does not appear to be the case.

I understand I can just add the option to the .config file and avoid this hassle but I'm very interested to know how to make this work.

To show my appreciation I will do something nice for you such as call you a nice name or tell you that you are pretty (or ugly if that's what you prefer).

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Programming :: Read In A File 1 Line At A Time?

Oct 22, 2010

i am trying to read in a file 1 line at a time and for some reason it stops printing out at about line 62,000.

i am doing this:
Code:
while(fgets(c0, 1085, fstream0) != NULL)

but after about 62,0000 lines it stops printing. no seg-fault, no core dump. it just stops printing to the terminal then returns me to the command line after a couple of minutes. as a hack i am doing split -l 50000 on the input and calling my program 5 times.is there some limitation on fgets that i am not understanding ?

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Programming :: Read Time Of /proc/net/tcp6 File

Dec 8, 2010

I am trying to read the /proc/net/tcp6 file of a huge server (chat server) for monitoring the tcp6 connection states.

My server's tcp6 file has more than 26000 lines. For monitoring the server connections, my monitoring tool has to read the /proc/net/tcp6 file quickly in a regular interval (5 secs) and process. Presently it takes minimum 6-7 seconds for reading the whole file.

My tool can able to read the normal file (26,000 lines) less than 1 second, but it is not possible to read the same size of proc file.

I have 2 questions:

1) Why proc file takes more read time than normal file?

2) Is there any way to read the /proc/net/tcp6 file more quickly?

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Software :: Real Time Programming ?

Mar 20, 2009

I want to start real time programming for linux(RTOS) so where I can get the basic of programming.I want to do it in C language..

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Programming :: Real-time Application ?

Sep 11, 2009

I seed a suggesting related asychron io. I'm write a program which use completion ports, but wandor how avoiding loops like for(; below...i.e I want parse proto with count in first and then computing some quantity of pieces. how that make with aio?

Code:

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Ubuntu :: Get Real-time Antivirus?

Oct 12, 2010

I'm new in UBUNTU and would like to get a real-time antivirus.Maybe it's not necessary, but I still want it (I've got an iMAC and have installed an antivirus... ) So, please... which antivirus is good and in real-time (I mean that, if I try to open an infected file or go to a bad website, it stops it). Is KLAMav good and in Real time?

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Server :: Is It Possible To Sync In Real Time Over Ftp?

Feb 1, 2010

I am currently using curlftps to mount a directory on a ftp server locally as /backup , I then use rsync to do an incremental backup to this directory every night and a full backup at the weekend.A requirement has arose for a similar set up but one that syncs in real time, so if a user puts a file in a directory it immediately copies that file to my ftp server, in this case it immediately copies it to /backup

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Installation :: XFS - How To Use Real-time Subvolume

Feb 24, 2010

I created filesystem XFS on partition hda8 with subvolume real-time on partition hda5: Code: mkfs.xfs -r rtdev=/dev/hda5 /dev/hda8 and i mounted it: Code: mount -t xfs -o rtdev=/dev/hda5 /dev/hda8 /xfs But I don't know how can I use this partition hda5 with subvolume real-time. I don't know how to create directories, copy files to it and another. Thanks for all answers!

EDIT:in manual it is writen: The realtime section is used to store the data of realtime files.These files had an attribute bit set through xfsctl(3) after file creation, before any data was written to the file.

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Ubuntu :: How To Use Real-time Kernel

Sep 9, 2010

if I want to use an rt kernel in ubuntu studio, how do i use the kernel? say for instance, Ubuntu studio is installed with generic kernel.then i download the rt kernel.

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Ubuntu :: No GUI Real Time Kernel?

Dec 29, 2010

Just installed a real time kernel on my new computer so I can record music. My problem is that I have no GUI. I noted that I would not when fglrx drivers could not be installed/applied to the new kernel when installing it.

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General :: Uploading A *.php File To Real Server It Don't Transfer?

Nov 13, 2010

Whenever I am uploading a *.php file to real server It don't transfer.

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General :: Install Real Player To Play .rm And .ra File In Ubuntu 11.04?

Aug 9, 2011

i find no solution to play .rm file which open in real player.

real player does not support linux.

how can i play .rm file in linux or altrnatively how can i install ral player in ubuntu 11.04

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Slackware :: How To Compile A Real-time Kernel 2.6.23-rc8-rt1

Oct 1, 2007

This should work for any distro really. The exact method you use to build your kernel may differ but creating the realtime kernel source is the same no matter what your technique. You can build in /usr/src if you prefer but I just don't see any need to do that. I simply build in ~/KERNEL as user. Then you can link /usr/src/linux to your source if it is not found.

Code:

make menuconfig OR if you just want to start with the same config from your current kernel

Code: make oldconfig Realtime preemption should be automatically checked.

Code: Processor type and features> Preemption Mode (Complete Preemption (Real-Time))

Also you should set kernel timer frequency to 1000HZ. Code: Processor type and features>Timer frequency (1000 HZ)

Code:

Now of course you should update your bootloader by adding an entry for your new kernel. Then run Code: lilo Or if you use GRUB it *should* be updated automatically.

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Ubuntu Multimedia :: Can't Set Real-time Priority

Dec 20, 2010

Running qjackctl as root allows me to run the audio in realtime so it seems to be a permissions problem and it seems to me that lubuntu does not read the /etc/security/limits.d/audio.conf file when I boot.

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