Re: [Ilugc] MySql data vanishes when tomcat is restarted
On Fri, Jul 27, 2012 at 9:39 PM, Balasubramaniam Natarajan bala150...@gmail.com wrote: On Fri, Jul 27, 2012 at 9:33 PM, Raju s raju...@gmail.com wrote: We don't use transaction /rollback. The default is commit Tomcat or MySql log we could not find any error Are there any cronjob which is running ? Type w at the command prompt to see how many people are logged on to the system. -- Regards, Balasubramaniam Natarajan No cronjobs are running either in user or root w command gives 4 people are logged in 1 root 3 staff Thanks Raju ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
[Ilugc] Communication between fork() ed processes
How to communicate between two processes after you fork()? IPC mechanisms exist to communicate between related and unrelated processes. Common methods are simple file I/O or even signals which just trigger. Perhaps you can trigger a file read after you write to it with a signal. But I don't do such things. I don't send signals between processes. Other methods are shared memory and UNIX domain sockets. I use both. Shared memory is bit boring. UNIX domain sockets can easily be welded into the poll(2) system call that I normally use anyway. So I ended up using that instead. The other common method is using pipe(2). I have used pipe but not much. It is unidirectional. Sometimes that is sufficient. And pipe can work with fork() processes. Only. UNIX domain sockets are cool since they are very generic and the semantics for communicating across the Internet and UNIX domain sockets are exactly identical. And you can even communicate with unrelated daemons that way. In fact I have had to do quite a bit of advanced operations particularly using web CGI. They all use UNIX domain sockets. I find the data transfer, EOF tracking, size that can be transferred, bidirectional facility, speed everything very satisfactory. I found some easy samples for you to try when I Googled. You could also do what I did. ;) Socket communications are a very nice topic to learn. -Girish -- Gayatri Hitech http://gayatri-hitech.com ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
[Ilugc] how to multitask
hi an open source hacker at the olympics: http://www.google-melange.com/gsoc/project/google/gsoc2012/tpbarron/16001 http://www.nytimes.com/2012/07/01/sports/olympics/racewalkers-compete-outside-the-spotlight.html -- regards Kenneth Gonsalves ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] MySql data vanishes when tomcat is restarted
On Sat, Jul 28, 2012 at 12:26 PM, Raju s raju...@gmail.com wrote: On Fri, Jul 27, 2012 at 9:39 PM, Balasubramaniam Natarajan bala150...@gmail.com wrote: No cronjobs are running either in user or root w command gives 4 people are logged in 1 root 3 staff Are these four people authorized to be on the system ? Try to increase the verbosity of the mysql server logging and try to restart apache and look at the logs may be you can get a clue. -- Regards, Balasubramaniam Natarajan www.etutorshop.com/moodle/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] MySql data vanishes when tomcat is restarted
On Sat, Jul 28, 2012 at 5:24 PM, Balasubramaniam Natarajan bala150...@gmail.com wrote: On Sat, Jul 28, 2012 at 12:26 PM, Raju s raju...@gmail.com wrote: On Fri, Jul 27, 2012 at 9:39 PM, Balasubramaniam Natarajan bala150...@gmail.com wrote: No cronjobs are running either in user or root w command gives 4 people are logged in 1 root 3 staff Are these four people authorized to be on the system ? Try to increase the verbosity of the mysql server logging and try to restart apache and look at the logs may be you can get a clue. -- Regards, Balasubramaniam Natarajan Yes all these four people are authorized. Further to our search, this happens only 2 or more people entering the data if only one person is doing the data entry, data is not lost when tomcat is restarted. Thanks Raju ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] [ILGUC] [HELP] Extraction of Data and Plotting
Request you data aquisition team to provide you the data in plain text format or some other standard format. If they can provide that then GNU Plot can do the rest. Most programs will have an option to export data into other formats. On Fri, Jul 27, 2012 at 11:32 PM, ARUN PALANIAPPAN arunpalaniappan@gmail.com wrote: 2012/7/27 Shrinivasan T tshriniva...@gmail.com Strictly speaking, I never use DAS.. !!The data is being acquired by an Electronics team. I just get the acquired data for analysis. Hence, I am unaware about the DAS. I am not sure if it supports Linux I have seen them acquire the data using DOS or windows (Depending on application) --Trimmed-- -- Regards, ARUN P ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc -- Sincerely, A. Narendiran ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] [ILGUC] [HELP] Extraction of Data and Plotting
2012/7/28 Narendiran a.narendi...@gmail.com Request you data aquisition team to provide you the data in plain text format or some other standard format. If they can provide that then GNU Plot can do the rest. Most programs will have an option to export data into other formats. Thank you... TRIMMED -- Sincerely, A. Narendiran ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc -- Regards, ARUN P A Tailor’s mistake is a Fashion But, An Engineer’s mistake is a Disaster. Preserve the earth; Else we will perish ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
[Ilugc] Ubuntu - alfresco query
Greetings, I installed alfresco on ubuntu precise yesternight (the bitnami stuff). I was able to login and all that. Today, when i tried after a reboot the http://127.0.0.1:8080/share, no reply. I am guess that tomcat is not running. I am not uncomfortable twisting a centos box's ear using chkconfig and all that. But I am all thumbs when it comes to deb. Any pointers? (of course a silly question from a noob) -- Regards, Rajagopal ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Ubuntu - alfresco query
On Sat, Jul 28, 2012 at 8:36 PM, Rajagopal Swaminathan raju.rajs...@gmail.com wrote: Greetings, I installed alfresco on ubuntu precise yesternight (the bitnami stuff). I was able to login and all that. Today, when i tried after a reboot the http://127.0.0.1:8080/share, no reply. I am guess that tomcat is not running. I am not uncomfortable twisting a centos box's ear using chkconfig and all that. #chkconfig list all | grep -i tomcat This command should show you all the runlevels on which Tomcat would be running on. However you network should be up before that. -- Regards, Balasubramaniam Natarajan www.etutorshop.com/moodle/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Ubuntu - alfresco query
Greetings, On Sat, Jul 28, 2012 at 9:25 PM, Balasubramaniam Natarajan bala150...@gmail.com wrote: #chkconfig list all | grep -i tomcat This command should show you all the runlevels on which Tomcat would be running on. However you network should be up before that. Thanks! It did not strike me at that point of time. I didn't know chkconfig/service etc. existed for deb. This sudo prefix business is distracting me like crazy. I am more comfortable su - way. creature of habit, I guess. -- Regards, Rajagopal ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] Ubuntu - alfresco query
Greetings, On Sat, Jul 28, 2012 at 8:53 PM, Mehul Ved mehul.n@gmail.com wrote: Good old sudo /etc/init.d/tomcat start will definitely work, for one time. to start the service at boot time\, sudo update-rc.d tomcat defaults more info here http://www.debuntu.org/how-to-manage-services-with-update-rc.d and if you prefer the upstart way then see http://upstart.ubuntu.com/getting-started.html I did think of /etc/init.d and refrained for I wanted a persistant. Will checkout the upstart. looks like a new beast to me. -- Regards, Rajagopal ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
[Ilugc] os customization
Hi all, I am trying to customize ubuntu 11.04 and I customized it. But I don't know how to change the os name. for example I am in need to change the name *ubuntu 11.04* as *custubuntu 11.04.01*. if possible please guide me. Thanks in advance. -- With regards, Dinesh Infotech https://dineshbeginner.wordpress.com/ ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
Re: [Ilugc] os customization
Don`t hesitate to ask anything about linux here. I think it should be grub.cfg file otherwise check the *grub* file path in Ubuntu 11 if it grub.cfg then follow this... *sudo gedit /boot/grub/grub.cfg* or *sudo vi /boot/grub/grub.cfg* On Sat, Jul 28, 2012 at 8:04 PM, Dinesh Infotech dinesh@gmail.comwrote: hi, Thanks for your reply and I followed the 2nd method, but it does not work. so if I follow 1st method can you please specify the line where I need to change in the file grub.cfg. sorry to ask this actually I'm beginner of linux. -- Thanks Regards L.Mohamed ilyas ___ ILUGC Mailing List: http://www.ae.iitm.ac.in/mailman/listinfo/ilugc
