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• Monitoring on java daemon on centos

  - by user111196

  I have a java application which I run using yasjw tool as a daemon. I need to monitor it in case it goes down I need some kind of alert or even restart it. Is there any tool can help me do this on centos environment? The results of ps -ef | grep java root 3109 1 0 Apr06 ? 00:04:35 /usr/java/jdk1.6.0_18/bin/java -Dwrapper.pidfile=/var/run/wrapper.commServer.pid -Dwrapper.service=true -Dwrapper.visible=false -jar /usr/local/yajsw-beta-10.2/wrapper.jar -c /usr/local/yajsw-beta-10.2/conf/wrapper.conf root 3132 3109 0 Apr06 ? 00:25:26 /usr/java/jdk1.6.0_18/bin/java -classpath /usr/local/yajsw-beta-10.2/./wrapperApp.jar:/usr/local -Xrs -Dwrapper.service=true -Dwrapper.console.visible=false -Dwrapper.visible=false -Dwrapper.pidfile=/var/run/wrapper.commServer.pid -Dwrapper.config=/usr/local/yajsw-beta-10.2/conf/wrapper.conf -Dwrapper.port=15003 -Dwrapper.key=4276015160565963367 -Dwrapper.teeName=4276015160565963367$1333699547154 -Dwrapper.tmpPath=/tmp org.rzo.yajsw.app.WrapperJVMMain root 23986 23945 0 16:53 pts/0 00:00:00 grep java pidof java 3132 3109

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• Deploy Jetty as port 80 daemon on Linux

  - by McKAMEY

  I'm curious what techniques you Linux admin gods are using to manage your Jetty deployments. I come from a Windows Server background so I'm still getting used to all of this. I've been looking for a good solution for deploying Jetty instances as port 80 on a Linux installation. So far I've seen this thread which allows Jetty to run as a daemon: http://jira.codehaus.org/browse/JETTY-458 And I've seen this thread which talks about alternates for setting up on port 80: http://wiki.eclipse.org/Jetty/Howto/Port80 These all seemed kind of hacky. Surely there is a relatively standard way of deploying a web server like Jetty on Linux. I'm currently using CentOS 5.5 but open to other distros. Thanks in advance.

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• Daemon Tools error (0xc0000006)

  - by Roberts

  I tried to reinstall Windows XP to Windows 7, but I could not install the video card drivers because the driver installation software only works on XP.I have launched the setup program with XP mode. After I installed the setup, I restarted the computer and Windows 7 wasn't booting.But that isn't the problem why I asked this question. The problem is that I have reinstalled my Windows 7 Ultimate to Windows XP SP3 and I wanted to install Dameon Tools.After installation I restarted the PC (as the setup wanted) and when the Daemon Tools launches it shows the error: Application failed to initialize properly (0xc0000006). Click OK to terminate the application.

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• How to customize system preferences settings for all users

  - by user3215

  Does anybody know how to apply a customized user settings to other existing or new users?. Something like a customized preferences settings for system wide so that everybody posses those settings and below will explain in clear what I actually ment. On every machine I will install the following: Eclipse Mysql Query Browser and Admin Mysql Workbench Oracle VirtualBox Thunderbird ----------- ----------- ----------- If I install them by apt, this will automatically create shortcuts in Applications but when I build them from source or extract the tar ball, I will have to add New Item at it's relevant place going to System-->Preferences-->Main Menu to make them available as a shortcuts and this settings are applied only for the account I login and perform them. How could I make this preferences settings for complete system wide which applies for all users? or if there is a way to apply a customized user settings to other users will also be ok. Any hint please? Thank you!

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• How to disable the alt-hotkey behavior on gnome terminal?

  - by farleyknight

  This is not just gnome terminal, but pretty much all gnome windows: When you hold the "alt" key, you can press the first letter of one of the menu items. This will let you scroll that menu without clicking on it directly. This is okay on any other window, like say Firefox, but on gnome terminal, it steals the keys I use for emacs!! There is very little chance of me learning a new set key combinations if I can avoid. If I can't isolate this just to gnome terminal, I'm fine with that.

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• use of gnome-keyring-daemon without X

  - by intuited

  I'm wondering if it is possible to use gnome-keyring-daemon without X. Normally it will present a graphical prompt in order to acquire a password for the keyring; is there a way around this? I'd like to be able to use ubuntu one without having to start a graphical session and type in my password.

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• How to fix? Gnome-shell shows up and instantly stop working

  - by Dario

  I am using ubuntu 12.04, but I love gnome shell, but not the Gnome Classic which comes installed. When I reinstalled, I instantly installed Gnome-shell by terminal using Unity, it worked for a while and then I started installing some extensions. I rebooted and it just stopped working, it shows up for a second, then I can only see my desktop with icons but without panels and I can't even use the terminal (CTRL + ALT + T) since the window doesn't really select when I click it. How could I fix this? I tried reinstalling Gnome-shell and all the stuff I installed for it, but now it doesn't work even without any extension.

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• Is it possible to run the GNOME user manager from XFCE4?

  - by Chris Moore

  If I run 'gnome-control-center' and click on the 'User Accounts' icon, the gnome-control-center crashes. I built it from source to see what's going on, and it turns out it's doing a if (strcmp(getenv("XDG_CURRENT_DESKTOP"), "GNOME")) in panels/user-accounts/um-password-dialog.c, line 690. I don't have an environment variable "XDG_CURRENT_DESKTOP", so the getenv is returning NULL, and the strcmp is segfaulting Where is XDG_CURRENT_DESKTOP meant to be defined? And shouldn't gnome-control-center check the pointer returned by getenv before passing it to strcmp? Does xfce4 have its own 'User Accounts' tool for creating new users?

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• Can anyone tell me how to get the same Gnome desktop environment as the one in the photo?

  - by Elysium

  I have been using gnome fallback for more than a year, but recently I have come across this image: However, when in virtual machine (new copy of ubuntu 12.04) I change to gnome 3 shell, the desktop is not even similar to the one in the photo above. I am wondering if there are others things that I am missing/have to do....to get to the same thing (or similar) that you can see in the image above. NOTE: Here is a screenshot from the virtual machine after I used these commands: sudo add-apt-repository ppa:gnome3-team/gnome3 sudo apt-get update sudo apt-get install gnome-shell

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• How to Delete/Disable gnome panels. No existing solutions working

  - by Alan Peabody

  I would like to remove gnome panel completely. I spend most of my time in a (tmux) terminal or a browser. Synapse and a small hidden AWN panel fit the rest of my needs. I have tried all recommended solutions including this (found it a few places): How to delete Gnome Panel? However it always comes back at log in. I have tried changing the required components panel to avant-whatever as well as to empty. I have tried setting them both as default (right click set as default). Right now I just have the last panel set to transparent and auto hide, but it still tends to be annoying. What do I need to do to get rid of this damn thing? Clarification: Using gconf-editor, gconftool2, and/or Ubuntu tweak to set /desktop/gnome/session/required_component/panel to avant-window-navigator is not working. The setting stays when I reboot, but the empty gnome panel sticks around.

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• Unwanted Chinese language got set in system settings

  - by Registered User

  I was discussing on the Ubuntu users list how to type in in Hindi (Indic language) in Libre Office and about a package installation problem. I have made some changes in system settings, following suggestions by some users. However, this morning when I did a reboot I am unable to see English as my default language. My system is showing some Chinese characters which I do not understand. All I wanted was to use Libre Office for a particular document in Hindi. What happened is that even Gmail is opening in Chinese. The system settings folder and others are also opening in Chinese. I am unable to use the system now. I have uploaded the snapshots here: please have a look. Upon a reboot, I was asked to rename all folders. Gmail opening in Chinese This is how menu on my system looks: half English and half Chinese Notice that in the third snapshot the calendar and menu are appearing in Chinese. I want the original US English menus and folder names back. I just wanted to type a document with Lohit Hindi font in Libre Office. I use Ubuntu 11.10. I do not use Unity, only Gnome desktop. I installed gnome-session-fallback a long time back and have been using that ever since. How do I get back to all English submenus and English folder names? I have a US English Keyboard and I use only US English. This thing which is now somehow set is unwanted.

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• How to prevent window list "confusion" when detaching eclipse views?

  - by amotzg

  I'm detaching eclipse views to float on my other screen in order to get more coding space on the first screen. When doing that, the detached windows appear in ubuntu's window list applet with the eclipse icon but with no title. Then, when pushing the main eclipse button on the window list, one of the detached views will get to front but not the main eclipse window. When using Alt+tab I can also see the extra eclipse icons but choosing the correct one for the main window works and make it the active window while also showing all detached childs. Other applications behave as expected, e.g. gimp floating panels don't show on the windows list and this is also the case with SlickEdit, Firefox child windows all show on window list but gets the focus correctly, etc. I can see the the workspace switcher show my two screens but in 'Monitor preferences' I see my two screens as one big screen. I'm working with ubuntu 10.04.4 under a VMware Workstation 7.1.3 build-324285. 'uname -a' output: Linux ubuntu 2.6.32-40-generic #87-Ubuntu SMP Tue Mar 6 00:56:56 UTC 2012 x86_64 GNU/Linux The desktop screen shot with the problem, ununtu's version, and Monitor preferences. How can I solve it and make only the main window show in window list or at least get activated when pushing it's button on the window list?

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• How do I "alt-tab" between windows using Gnome 3?

  - by josmh

  All of the references I've found for Gnome 3 keyboard shortcuts list that alt+tab switches between applications and alt+` switches between windows (some actually say alt+~, but I think they're mistaken, and I've tried both anyway). Maybe that functionality works for Gnome 3 on Fedora or something, because no matter the key combo I try, nothing will switch between windows except for opening the alt+tab dialog and using arrow keys to navigate it (and at that point it's faster to just use a mouse..). How do I quickly switch between windows in Gnome 3?

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• Gnome/X logs off immediately after login -- which logfiles are relevant?

  - by joebuntu

  I've been tinkering with fingerprint-gui as well as X/xrandr resolution settings. When I start my machine, it boots up normally. As soon as X and gnome have finished starting, it logs me off automatically and brings me back to the gdm login prompt with the user list. Then I am, however, able to log in using "Ubuntu Desktop Fail-safe". I've checked the list of start-up applications, but everything seems fine there. I can't yet put my finger on what exactly might be responsible for this: X, gnome or some messed up pam.d settings. So far I've checked /var/logs/X11/xorg.0.log, /var/logs/auth.log and ~/.xsession-errors. In addition, I don't quite seem to understand the "interplay" between X, GDM, GNOME, GNOME-policykit, PAM.d and all that. Are there any other relevant log files that could point me to what's broken? Specs: Ubuntu 10.10 Maverick Meerkat IBM/Lenovo Thinkpad R60, ATI Radeon x1400 Mobility all updates installed Linux User 1 year+,

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• How can I get Gnome3 to remember my session?

  - by user60381

  I am running Gnome3, but I had the same problem with Unity, on Ubuntu 12.04. I have a fairly elaborate setup I enjoy using day-to-day. A LibreOffice spreadsheet with everyone's extension numbers; a window with reference data I use regularly; two mulit-tabbed Konsole/Terminal windows with several remote systems sessions, firefox with a set of open tabs, and so on. But whenever I log out, when I return, I must set up everything from scratch. I remember the good 'ol days, when I rebooted, I'd re-log in, and all my windows came back up in the same places as they were when I logged out, and my Konsole/Term would come up with the same remote logins as before.... I'd have to re -setup some of my programs, but that's better than having to move every win into place, and resize them, etc. How do I get this functionality back?

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• Gnome/X logs off immediately after login -- which logfiles are relevant?

  - by joebuntu

  I've been tinkering with fingerprint-gui as well as X/xrandr resolution settings. When I start my machine, it boots up normally. As soon as X and gnome have finished starting, it logs me off automatically and brings me back to the gdm login prompt with the user list. Then I am, however, able to log in using "Ubuntu Desktop Fail-safe". I've checked the list of start-up applications, but everything seems fine there. I can't yet put my finger on what exactly might be responsible for this: X, gnome or some messed up pam.d settings. So far I've checked /var/logs/X11/xorg.0.log, /var/logs/auth.log and ~/.xsession-errors. In addition, I don't quite seem to understand the "interplay" between X, GDM, GNOME, GNOME-policykit, PAM.d and all that. Are there any other relevant log files that could point me to what's broken? Specs: Ubuntu 10.10 Maverick Meerkat IBM/Lenovo Thinkpad R60, ATI Radeon x1400 Mobility all updates installed Linux User 1 year+,

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• How to restart Gnome Shell after a crash short of killing X?

  - by wintercorn

  How can I restart Gnome Shell after a crash? Alt+F2 and restart won't work as the prompt crashed with the shell. Since windows focus is gone along with the shell as well, I can't type gnome-shell --replace in a terminal, either. The Ctr+Alt+F1 command line can't open the X display. So I'm left with killing X, thus loosing all open applications. Is there a keyboard shortcut for restarting Gnome Shell?

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• Gnome 3 gdm fails to start after preupgrade from fedora 14 to 15

  - by digital illusion

  I'm not able to boot fedora 15 in runlevel 5. After all services start, when the login screen should appear, gdm just show a mouse waiting cursor and keeps restarting itself. From /var/log/gdm/\:0-greeter.log Gtk-Message: Failed to load module "pk-gtk-module" /usr/bin/gnome-session: symbol lookup error: /usr/lib/gtk-3.0/modules/libatk-bridge.so: undefined symbol: atk_plug_get_type /usr/libexec/gnome-setting-daemon: symbol lookup error: /usr/lib/gtk-3.0modules/libatk-bridge.so: undefined symbol: atk_plug_get_type Where should atk_plug_get_type be defined? Edit: Here a better description of the error (system-config-network-gui:2643): Gnome-WARNING **: Accessibility: failed to find module 'libgail-gnome' which is needed to make this application accessible /usr/bin/python: symbol lookup error: /usr/lib/gtk-2.0/modules/libatk-bridge.so: undefined symbol: atk_plug_get_type Why there are still references to gtk2? Did preupgrade fail? Attaching upgrade log... it seems gdm was not added, but it is present in the users and groups list. May 26 11:25:52 sysimage sendmail[1076]: alias database /etc/aliases rebuilt by root May 26 11:25:52 sysimage sendmail[1076]: /etc/aliases: 77 aliases, longest 23 bytes, 795 bytes total May 26 11:46:09 sysimage useradd[1793]: failed adding user 'dbus', data deleted May 26 11:53:37 sysimage systemd-machine-id-setup[2443]: Initializing machine ID from D-Bus machine ID. May 26 11:55:28 sysimage useradd[2835]: failed adding user 'apache', data deleted May 26 11:55:38 sysimage useradd[2842]: failed adding user 'haldaemon', data deleted May 26 11:55:43 sysimage useradd[2848]: failed adding user 'smolt', data deleted May 26 11:57:32 sysimage sendmail[3032]: alias database /etc/aliases rebuilt by root May 26 11:57:32 sysimage sendmail[3032]: /etc/aliases: 77 aliases, longest 23 bytes, 795 bytes total May 26 11:57:46 sysimage groupadd[3066]: group added to /etc/group: name=cgred, GID=482 May 26 11:57:47 sysimage groupadd[3066]: group added to /etc/gshadow: name=cgred May 26 11:57:47 sysimage groupadd[3066]: new group: name=cgred, GID=482 May 26 11:58:42 sysimage useradd[3086]: failed adding user 'ntp', data deleted May 26 12:00:13 sysimage dbus: avc: received policyload notice (seqno=2) May 26 12:15:08 sysimage useradd[4950]: failed adding user 'gdm', data deleted May 26 12:24:39 sysimage dbus: avc: received policyload notice (seqno=3) May 26 12:25:24 sysimage useradd[5522]: failed adding user 'mysql', data deleted May 26 12:25:37 sysimage useradd[5533]: failed adding user 'rpcuser', data deleted May 26 12:26:31 sysimage useradd[5592]: failed adding user 'tcpdump', data deleted Any suggestions before I revert installation to F14?

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• How do I enable Ubuntu Gnome system tools

  - by RussellW

  I am running Ubuntu 10 with Gnome 2.30.2. This is a VMWare workstation image provided by another company that I do not have support in this regard. I am trying to access the graphical tools for configuring the network, users, and services but the System-Administration menu does not have these options listed. The main issue I am trying to solve is to correct the problems with the gnome menu options and network settings I have the gnome-system-tools package installed, and I am unable to run command-line versions of the tools, such as nm-applet (I get no GUI if I run that command, the process is running in the background). I realize that I can perform many tasks command-line, but I would like to use the GUI for administrative functions as I am not overly proficient for all command for restarting services and setting a static IP with a specific gateway. Further, I can run gnome-nettool, but I cannot change the IP, I can only see my network card. nm-connection-editor does not show any network cards that I can configure to change the IP. Currently, I am getting a DHCP through my NAT in VMWare, I want to set it to a specific IP address though. Preferences Menu (note some missing options) ![Preferences Menu][1] Admin Menu (note some missing options) ![Admin Menu][2] Network Tools (I can view but not change IP address) ![Network Tools][3] Network Settings (Unable to change IP address) ![Network Settings][4] Network Connections (no connections listed, not even my existing ethernet NAT connection through VMWare) ![Network Connections][5] See images here that I have referenced: 1- http://i.imgur.com/kl8pP.png 2- http://i.imgur.com/K3Cjz.png 3- Iq7Xb.png 4- 7wheV.png 5- J2ad8.png

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• Communicating with a running python daemon

  - by hanksims

  I wrote a small Python application that runs as a daemon. It utilizes threading and queues. I'm looking for general approaches to altering this application so that I can communicate with it while it's running. Mostly I'd like to be able to monitor its health. In a nutshell, I'd like to be able to do something like this: python application.py start # launches the daemon Later, I'd like to be able to come along and do something like: python application.py check_queue_size # return info from the daemonized process To be clear, I don't have any problem implementing the Django-inspired syntax. What I don't have any idea how to do is to send signals to the daemonized process (start), or how to write the daemon to handle and respond to such signals. Like I said above, I'm looking for general approaches. The only one I can see right now is telling the daemon constantly log everything that might be needed to a file, but I hope there's a less messy way to go about it. UPDATE: Wow, a lot of great answers. Thanks so much. I think I'll look at both Pyro and the web.py/Werkzeug approaches, since Twisted is a little more than I want to bite off at this point. The next conceptual challenge, I suppose, is how to go about talking to my worker threads without hanging them up. Thanks again.

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• Start daemon after specific samba share is mounted

  - by getack

  I axed this question on AskUbuntu, but it's not getting any traction from there... So I'll try here as well: I have a homebrew headless NAS running 12.04. In it I have a bunch of disks that are presented as a samba share thanks to Greyhole. If I want to do anything to the files within this share, I must do it through greyhole so that everything is updated properly. Thus, the share must be mounted locally and then accessed from there if I want to work on the files from the local machine. I do this mounting automatically thanks to these instructions. I also have Deluge installed that takes care of all my torrenting needs. Deluge's default download location is in this share, so that all the downloads are immediately available to the rest of the network. Obviously for everything to work, the share must be mounted, otherwise Deluge is going to have a problem downloading to it. The problem is, it seems like Deluge is starting before the shares are mounted when the system boots. So downloading/seeding does not continue automatically after boot. I have to log in and force a manual rescan and start on each torrent otherwise all the torrents just hangs on the error. Is there a way I can make deluge start after the shares got properly mounted? I looked into Upstart's emits functionality but I cannot seem to get it to work properly. Any advice?

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• Wireless networking on Gnome on Ubuntu 9 / 10

  - by WaveyDavey

  So here's my problem: I have some netbooks (ASUS eee, and ACER Aspire Ones) that I've been tasked to set up as kiosk machines, locked up tight for normal users. I am a command-line, server man, so this gnome malarkey is all a bit new to me. I found a lovely 9.04 kiosk livecd that installs and runs exactly as I want it to, but I can't get the wireless working. So I dropped on a full 10.4 distro, and wireless works straight out of the box (so hardware is good) - all I needed to do was right-click on the network connection icon, enter my SSID and password (WPA/WPA2) and away it went, perfect. Further investigation on 10.4 distro shows that /etc/networking/interfaces is virtually empty (just auto lo iface lo inet loopback in it), even after I have set up the wireless thru the gnome taskbar applet (is that the right word?). So where does gnome / ubuntu store the network settings to bring the blasted wireless connection up, and what do I need to do on the kiosk version to get wireless running?

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• Wireless networking on Gnome on Ubuntu 9 / 10

  - by WaveyDavey

  So here's my problem: I have some netbooks (ASUS eee, and ACER Aspire Ones) that I've been tasked to set up as kiosk machines, locked up tight for normal users. I am a command-line, server man, so this gnome malarkey is all a bit new to me. I found a lovely 9.04 kiosk livecd that installs and runs exactly as I want it to, but I can't get the wireless working. So I dropped on a full 10.4 distro, and wireless works straight out of the box (so hardware is good) - all I needed to do was right-click on the network connection icon, enter my SSID and password (WPA/WPA2) and away it went, perfect. Further investigation on 10.4 distro shows that /etc/networking/interfaces is virtually empty (just auto lo iface lo inet loopback in it), even after I have set up the wireless thru the gnome taskbar applet (is that the right word?). So where does gnome / ubuntu store the network settings to bring the blasted wireless connection up, and what do I need to do on the kiosk version to get wireless running?

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• How to extend selection in gnome-terminal?

  - by tomasorti

  In a terminal I can select a single line, double clicking with the Left Mouse Button. With xterm, I can extend that selection clicking with the Right Mouse Button in the place I want to extend it. Then can I paste the whole selection with the Middle Mouse Button or paste it in other application. In gnome-terminal, it seems I can extend the selection clicking with the Left Mouse Button, but holding at the same time the Shift key. Visually, it seems the selection is done, but when clicking with the Middle Mouse button or pasting in other application, I only get the primary single line selection. How can I get the whole selection under gnome-terminal? Is it possible to use selections in gnome-terminal as xterm does? Cheers, Tomas.

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• Cannot run gnome-session

  - by Brian

  I'm having issues running an X Windows session on a RHEL5 64-bit server - whenever I execute the command "gnome-session &", the process goes into the background but nothing happens. I have Exceed installed on my Windows machine which is running when I try to start the gnome-session. I've tried just starting firefox by itself instead of the whole gnome session, but it doesn't work either. Any suggestions? BTW, here's the error message I get when I try to start firefox: firefox: Fatal IO error 104 (Connection reset by peer) on X server localhost:10.0.

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