General :: Method To Find Time For Accessing A Block From Disk?

Nov 23, 2010

Is there any way to find the time required for accessing a block
from disk?

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General :: Debian - Track When Determines Time Without NTP With Some Other Method?

Jun 14, 2011

When a Linux machine with NTP capabilities will start and it does not find the NTP server, how it will determine the time? A clue I have is that it uses some heuristic method but I don't need what does that mean. My main question is: How can I track such an event on a monitoring purpose?

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Networking :: Block Specific Websites - Preferred Method ?

May 19, 2010

I'm trying to block specific websites, preferably using a portion of the url.

For example, if blocking [url], [url] would also be blocked. This implies that simply blocking a single IP using iptables would not work well.

The names to block will be somewhat dynamic, so a list specification would be ideal.

In my case, the LAN has a mix of linux and ms machines, and they all use a linux gateway currently running dnsmasq.

I find suggestions from using /etc/hosts (might work with yp, but not ideal) on the gateway machine, through to using squid on the gateway machine.

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Fedora Networking :: Block App Using Iptables / Rope Scriptable Method?

Oct 27, 2010

I Need to know how to block this applications using iptables or ROPE scriptable Method..?..

1.Web navigation
2.Electronic mail
3.FTP transfers
4.Video traffic (multicast video stream and unicast video stream)
5.VoIP service
6.Instant Message (MSN and yahoo messenger�etc)
7.Management service (TR-069 and SNMP)

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Networking :: Block This Applications Using Iptables - ROPE Scriptable Method?

Oct 27, 2010

I Need to know how to block this applications using iptables or ROPE scriptable Method..?..

1.Web navigation
2.Electronic mail
3.FTP transfers
4.Video traffic (multicast video stream and unicast video stream)
5.VoIP service
6.Instant Message (MSN and yahoo messenger�etc)
7.Management service (TR-069 and SNMP)

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General :: Offline Method Required To Find Out Number Of Days Since A Certain Date?

Dec 13, 2010

What offline method is there of finding out days since a certain date. Example: How would someone find the number of days from 1-Jan-2003 to 7-Dec-2010? Could someone write a script that takes in the 2 dates and output the number of days?

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General :: Accessing The Hard Disk Using The /dev/sda Interface?

Mar 25, 2010

I am developing a program which can access the SATA-hard disk. I have to use the /dev/sda interface for accessing the hard disk. What are all the commands i can use to perform the sector read, write (Both DMA and PIO), sending the smart commands etc. Or is there any easier way?

I saw that i can make use of hdparm call for getting some of the attributes.

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General :: How To Find Out What Process Is Accessing HDD?

Apr 8, 2010

I can see that the light of the HDD is flashing. I would like to find out what the process is that is accessing the HDD. Is there a way to achieve this?Is there a utility that ties up processes with hw resources?

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General :: Hard Disk Data Transfer Accessing Error

Jun 28, 2010

I am using an embedded platform in which I have connected an external harddisk (/dev/sda). The SCSI driver is present and I am using the SG_IO interface for performing the SMART commands with the Hard Disk. (Unfortunately not all the HDIO ioclts are present. So I opted for the SG_IO ioctl). But the data transfer (reading/write data from/to sector) is not working with the SG_IO ioctls. So I searched for some other options. Later in one of the places, I found that we can actually mount the /dev/sda to some mount point in /mnt and then make a XFS file system (mkfs.xfs) of this.

And then we can create the directories and do file operations on this mounted directory. Here the simple read/write systems calls can be used for this. I was thinking about this implementation. But I am confused how I can map the actual LBA (Logical Block Address) to the device file offset. I mean if I want to write to the sector 5, there will be a LBA for it. So I can do lseek on my device and then write the data there. So how the mapping between LBA and device file offset can be calculated.

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General :: Block Size For Disk Cloning With Diskdump (dd)?

Jan 17, 2011

I use dd in its simplest form to clone a hard drive dd if=INPUT of=OUTPUT However, I read in the manpage that dd knows a blocksize parameter. I was wondering whether there is an optimal value for the blocksize parameter that will speed up the cloning procedure?

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Networking :: Red Hat 5 - Add Firewall Functionality To Block Clients Ip Accessing Internet

Jan 26, 2010

I already have Linux Enterprise 5 system installed with some server packages such as Webmin, Active Directory, Web Server which also act as Internet gateway. Now I want to add firewall functionality to block clients ip accessing internet.

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Software :: Setup Apache To Normally Block An IP From Accessing A Site Until That IP Is In A Database/file?

Nov 16, 2010

Is it possible to setup apache to normally block an IP from accessing a site until that IP is in a database/file?More or less, I need a login system that another script can add/remove the IPs and the site can be accessed by only those IPs.

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General :: Cannot Mount Hard Disk: Block Count Exceeds Size Of Device

May 11, 2011

I have one hard disk (call her HDA) that contains nothing but a single ext4 partition containing a backup of all my important data. Last night I did a clean install of Ubuntu 10.10 on my primary hard disk (call her HDB) and from there proceeded to upgrade directly to Ubuntu 11.04 upgrade. In 10.10, I was able to read HDA just fine. However after the upgrade, I can no longer mount this drive. When mounting from file browser:


Error mounting: mount: wrong fs type, bad option, bad superblock on /dev/sda,missing codepage or helper program, or other error In some cases useful info is found in syslog - try dmesg | tail or so The end of dmesg said the following:


dmesg | tail
[ 82.130904] EXT4-fs (sda): bad geometry: block count 122096646 exceeds size of device (122096381 blocks)

my hard disk has a block count greater than the size of my device. I've done my background searching on this and tried a command line utility I've never heard of before:


# sudo e2fsck /dev/sda
e2fsck 1.41.14 (22-Dec-2010)
The filesystem size (according to the superblock) is 122096646 blocks
The physical size of the device is 122096381 blocks


this is as far as I've gotten. This drive holds over a decade's worth of work for me and is extremely valuable. I really didn't think that the Ubuntu upgrade process would mess with this drive, seeing as the Ubuntu install was contained on an entirely different drive. What is it that I need to do to restore my drive to working status?

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CentOS 5 Server :: Method Of Seeing Real-Time Traffic / IP To Apache

Sep 16, 2010

We have a production web site running apache 2.2.3 across several web servers. we also have a major problem with SPAM comments right now. our method of identifying valid IPs (whether by external clients/customers, or internal personnel) vs SPAM'ers is not ideal - its prone to erroneously labeling legit IP's as targets to be blacklisted.

What we need is.. a way to see how much distinct request traffic is coming from any given IP address to the site in real time (or very near realtime). Essentially we want to see in some graphic/chart way requests per sec to apache / per ip sorted by requests per sec.Would nTop do this? I've only used this in a limited form at a branch office, not on a production web server.

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Ubuntu :: Nautilus Simple Click Mounting Method At Boot-time?

Feb 16, 2011

I'm trying to find a way to auto-mount a couple of NTFS volumes at login (or even earlier if possible), not by editingfstab or running the (currently buggy for Maverick) ntfs-config tool, but by simulating the way that Nautilus mounts volumes when you click or double click on one. The reasons for this are not important(just to make things a little mysterious).So, I checked the output of syslog when I click on an unmounted volume in Nautilus. It seems very useful, but I can't make much out of it. So I need your help I need to make something like a script to do this thing at startup.

Feb 16 20:52:28 UBUNTU-BCM-P5Q-DELUXE ntfs-3g[3701]: Version 2010.8.8 external FUSE 28
Feb 16 20:52:28 UBUNTU-BCM-P5Q-DELUXE ntfs-3g[3701]: Mounted /dev/sdb1 (Read-Write, label


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Ubuntu :: Find A Different Method To Install Directly Into 9.1?

Apr 5, 2010

first post and is a simple question for some on here. If I install a game using wine , will it/does it have any deteramental effect in it's running speed and stuff ie will it be using the wine enviroment to run the game whilst playing it?. Or should I find a different method to install it directly into ubuntu 9.1?

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General :: Real Time Info About Disk Activity?

Feb 18, 2011

kernel, 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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Ubuntu :: Method Required To Find Out Number Of Days Between 2 Dates?

Dec 15, 2010

Can someone show me a simple method to find out number of days between 2 dates?

Example: How would I find the number of days between 25-12-2003 to 25-12-2010? Could someone write a line of code that takes in the two dates and outputs the number of days? Or is there a program that can do this?

I know of websites that do this but I'd also like an offline method.

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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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Fedora Networking :: Tough Time Accessing Websites With F8

Feb 4, 2009

I have dual boot Fedora 8/XP. My net seams to be moody only in my fedora sometimes I have wait as long as 30 sec for the page to load where as in my windows it's fine no such delay. This happens randomly yesterday night I had tough time accessing this forum (in addition to other sites) now it's working fine.

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Ubuntu :: Block Hosts For A Given Time?

Jul 13, 2010

Is there anyway that I can prevent access to the hosts file, or any file for that matter, for a time that I can specify, so that within that time no one will be able to open and edit the said file?

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General :: How To Find Vsftpd Users Last Login Time

Mar 10, 2011

extracting a list of all vsftpd users with last login time.



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General :: Script To Find Files By Data And Time?

Aug 6, 2010

We have a script that FTP files 3 times a day, once ant 02:30, 04:00 and 13:00. Once the process runs it puts a copy of the file sent in the processed folder. What I'm trying to do is check to see if the files are there and if not send an alert /email. The file names are IVF_20100806_*.150, PLAZ_ 20100806_*.151, TRAN_20100806_*.152 and TRAN_20100806_*.151

This is what I have

. ${HOME}/.bash_profile


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OpenSUSE Network :: Block A Site For A Certain Time Period?

Dec 6, 2010

I'm trying to block a site for a certain time.How to Block(deny) perticuler website in certain times of the day , by using squid ? and it seemed promising.I added the lines to my squid.conf

acl office_time time MTWHF 3:00-21:00
acl bad url_regex "/etc/squid/block.acl
http_access deny bad !office_time

created a block.acl in the same directory and restarted it.

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Programming :: Measure CPU Time Spent On A Code Block (with C Or C++)?

Jul 31, 2011

I have a C program like this:


I want to know how much CPU time spent on CODE_BLOCK. Since the process executing CODE_BLOCK may be preempted during execution, this CPU time may not be equal to the (wall-clock) time elapsed from the beginning of CODE_BLOCK to the end of it.

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Fedora :: Accessing Newly Formatted Disk (JFS Filesystem)

May 9, 2010

I have just formatted an external USB disk with a JFS filesystem. The partition shows up in 'Computer', and it mounts, but if I try and copy and files onto it, it will not do it. Clearly, Nautilus is mounting it read-only. How do I get this to behave like my USB Flash drive, where I plug it in, and its automatically mounted read/write?

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General :: Find Big Files On The Disk?

Oct 17, 2010

How can I find big files on the my Linux disk with say more than 500MB in size?

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General :: Can't Find Digital Persona Time Recorder For Ubuntu

Nov 29, 2010

Just want to ask if anyone knows an attendance time recording software for Ubuntu using Digital Persona fingerprint scanner?

Our disk only works for Windows.

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Server :: Use Iptables To Block Multiple Requests From The Same Ip Within A Certain Time Frame?

Oct 17, 2010

I run a small home server (Debian 4), which acts as my gateway to the internet (ie, firewall) and runs a web server, dhcp, dns, and acts as a file server to the rest of the machines on my home network. Now I know it's never a smart idea to have all those services running on the same machine that is acting as a firewall, but I don't fancy running multiple servers just for home use, as it's mainly allowing me to learn system administration.

I noticed a few days ago that my internet had become unbearably slow, to the point where I could sometimes not load web pages. I spent a while searching through log files on my gateway, to try and find out what was eating up all of my bandwidth. When I came to apache's access.log file, I was confronted with this:

Code: - - [17/Oct/2010:06:25:10 +0100] "GET HTTP/1.1" 200 36921 "-" "Mozilla/4.0 (compatible; M$ - - [17/Oct/2010:06:25:11 +0100] "GET HTTP/1.1" 200 58681 "-" "Mozilla/4.0 (com$


Multiple requests to my server, for totally random websites. I didn't even know it was possible to make those types of queries to a webserver. The only thing that is on the web server is a browser based torrent client. I have only shown a small snippet of the log file, but there are around 90k lines to different web addresses, from many different IPs. What I want to know, is what is happening? :S Why is someone querying MY web server, for web sites totally unrelated to it? And most of all, how can I stop it. My initial was to try and use iptables to block multiple requests from the same ip within a certain time frame, which I think would work as the server shouldn't really get many queries from external networks.

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Ubuntu Multimedia :: Rhythmbox: Accessing Disk Every Few Seconds While Playing?

May 18, 2010

I'm running Lucid and have an annoying problem with Rhythmbox: while playing, it constantly accesses the disk, every 2-3 seconds drrrrd drrrrd. Listening to some silent music is horrible - the output of the speakers is lower than the noise of the local disk.

Maybe relevant settings in Edit->Preferences:
Playback -> Network Buffer Size: 1024 kB
Music -> Watch my library for new files: off

Is there anything else one can change? It can't be that difficult to read a <10MB file into memory right from the start and not touch the disk drrrrd every few seconds?! P.S. I verified by turning off the speakers and start/stop playback - the noise there on playback and not if turned off. Reliably.

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