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  • What does export do in BASH?

    - by Chas. Owens
    It is hard to admit, but I have never really understood what exactly export does to an environment variable. I know that if I don't export a variable I sometimes can't see it in child processes, but sometimes it seems like I can. What is really going on when I say export foo=5 and when should I not export a variable?

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  • Is it possible to ensure that multiple applications run in the same terminal server session using RemoteApp?

    - by mbrownnyc
    We are interested in implementing RemoteApp on Windows 2008 R2 to serve out a few programs. Since the developers use shared memory to pass messages between processes, it is necessary that we provide them with a solution that will allow this. They have researched and discovered that if the applications exist in the same terminal server session that they will be able to access shared memory. Is there a way to absolutely ensure that multiple RemoteApps are running within the same session (with the same user) so that they can access the same shared memory?

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  • Scientific Linux - mysql and apache fail to start on reboot

    - by Derek Deed
    Both mysqld and httpd fail to restart following a reboot of the server, although chkconfig --list shows both daemons set to on for run levels 2,3,4 & 5 All control is being exectuted via Webmin Reboot server – MySQl and Apache not running MySQL Database Server MySQL version 5.1.69 MySQL is not running on your system - database list could not be retrieved. ________________________________________ Click this button to start the MySQL database server on your system with the command /etc/rc.d/init.d/mysqld start. This Webmin module cannot administer the database until it is started. Apache Webserver Apache version 2.2.15 Start Apache Search Docs.. Global configuration Existing virtual hosts Create virtual host Select all. | Invert selection. Default Server Defines the default settings for all other virtual servers, and processes any unhandled requests. Address Any Port Any Server Name Automatic Document Root /var/www/drupal Virtual Server Processes all requests on port 443 not handled by other virtual servers. Address Any Port 443 Server Name Automatic Document Root /var/www/drupal Select all. | Invert selection. chkconfig --list mysqld mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off chkconfig --list httpd httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off Manually Restart Apache chkconfig --list httpd httpd 0:off 1:off 2:on 3:on 4:on 5:on 6:off Manually Restart MySQL chkconfig --list mysqld mysqld 0:off 1:off 2:on 3:on 4:on 5:on 6:off Everything now running okay; but no difference in the chkconfig outputs above. I tried: chkconfig --levels 235 httpd on /etc/init.d/httpd start and the same for mysqld but no change in operation. Log files show that the shutdown has been completed successfully; but there is no indication of the service restarting until it is executed manually: 131112 13:59:15 InnoDB: Starting shutdown... 131112 13:59:16 InnoDB: Shutdown completed; log sequence number 0 881747021 131112 13:59:16 [Note] /usr/libexec/mysqld: Shutdown complete 131112 13:59:16 mysqld_safe mysqld from pid file /var/run/mysqld/mysqld.pid ended 131112 14:09:52 mysqld_safe Starting mysqld daemon with databases from /var/lib/mysql 131112 14:09:52 InnoDB: Initializing buffer pool, size = 8.0M 131112 14:09:52 InnoDB: Completed initialization of buffer pool And the Apache logs: [Tue Nov 12 13:59:13 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Tue Nov 12 13:59:13 2013] [notice] Digest: generating secret for digest authentication ... [Tue Nov 12 13:59:13 2013] [notice] Digest: done [Tue Nov 12 13:59:14 2013] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.0-fips configured -- resuming normal operations [Tue Nov 12 13:59:14 2013] [notice] caught SIGTERM, shutting down [Tue Nov 12 14:27:13 2013] [notice] suEXEC mechanism enabled (wrapper: /usr/sbin/suexec) [Tue Nov 12 14:27:13 2013] [notice] Digest: generating secret for digest authentication ... [Tue Nov 12 14:27:13 2013] [notice] Digest: done [Tue Nov 12 14:27:13 2013] [notice] Apache/2.2.15 (Unix) DAV/2 PHP/5.3.3 mod_ssl/2.2.15 OpenSSL/1.0.0-fips configured -- resuming normal operations Is anyone able to shed any light on this problem?

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  • How do I troubleshoot computer dumps?

    - by KronoS
    Once I have a dump of a computer crash/freeze, what are some tools and steps to take in order to troubleshoot crash based off of the dump itself? I am looking for tools to isolate what processes or issues are causing the crash, and also good techniques in troubleshoot the actual dump itself. Once I've determined what the "troublesome" process has been, what do I do to troubleshoot the issue? For example if I determine process foo.exe or bar.dll etc, is the problematic file how do I determine what can be done?

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  • How can I unbind a UDP port that has no entry in lsof?

    - by Chocohound
    On my Mac, I have a UDP port that is "already in use", but doesn't have an associated process: sudo netstat -na | grep "udp.*\.500\>" shows udp4 0 0 192.168.50.181.500 *.* udp4 0 0 192.168.29.166.500 *.* sudo lsof doesn't show a process on port 500 (ie sudo lsof -i:500 -P reports nothing). Note I'm using 'sudo' on both commands so it should show all processes. (rebooting works, but looking for something less disruptive) How can I unbind port 500 so I can use it again?

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  • IE 8 has stopped working

    - by kurresmack
    Hey, I know that question has been asked many times but I have tried all the solutions that I've seen but with no further success. When I open internet explorer it simply stops working directly, reopens the tab 3 times and then stops. I have uninstalled flash player. Reset IE. Tried to close as many processes I can. Ran spybot S&D. Started IE without addonds

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  • Subversion/Hudson/Sonar/Artifactory - too much for my little server to handle! Help!

    - by Ricket
    I have a little dedicated server. It's at a cheap price and has a simple AMD 1800+ (1.5ghz), 256mb DDR RAM, ...need I continue? And I think I'm overloading it already. I have installed the following, and it's running CentOS 5.4: Webmin Apache MySQL Subversion as an Apache module Hudson (standalone) Sonar (standalone, runs with a standalone Jetty install) Artifactory (standalone) That's pretty much it. But I'm having problems; pages are loading quite slowly. Network speed of the server is excellent, but I think I'm just running out of CPU and/or memory. A side-effect of the pages loading slowly is that sometimes Hudson times out, not being able to start Maven or contact Sonar in a certain amount of time. I think the next step to speed things up might be to move to an application server and use the WAR version of Hudson, Sonar and Artifactory together on that server. I don't know that it will help, but it just seems to make sense, especially with Sonar running on its own Jetty install and the other two probably running their own mini application servers as well. Am I correct in thinking this? Is this the right course of action? Any other tips on how to make the server run faster? I can post more data if you'd like, just let me know what else would help you answer my question. Oh, also just to cure any suspicions, I don't have any sort of virus or spyware. I protect my SSH access with DenyHosts (which has blocked 300+ brute forcers in the past few months), and I have confirmed that the top four processes in terms of memory and CPU usage are Sonar, Artifactory, Hudson, and MySQL. Edit: I just thought of another thing that I'd like you to comment on as well: Apache currently has 8 spawned slave processes, taking 42MB of ram apiece. This is not my web server. Is everything else able to function if I shut down Apache? Can you point me towards a tutorial or something on migrating Subversion from Apache into something that might work along with the other three applications, maybe even make Subversion a WAR file or something?

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  • Can a process be frozen temporarily in linux?

    - by Pal Szasz
    I was wondering if there is a way to freeze any process for a certain amount of time? What I mean is that: is it possible for one application (probably running as root) to pause the execution of another already running process (any process, both GUI and command line) and then resume it later? In other words I don't want certain processes to be scheduled by the linux scheduler for a certain amount of time.

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  • Deny login from certain hosts if logging in with specific sql credentials

    - by Dave
    I want to stop some of our developers from connecting to the production sql server using a specific sql account. They have rights to connect through windows authentication with lower rights. They claim that changing the password will affect too many other processes running on our processing machine. So I want to deny access if they're connecting from there dev machines for now. Another way this would work is if I could just allow connections from one specific host.

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  • Is there a way to apply a GPO to all but selective users? (SBS 2008)

    - by CandyCo
    I've created a GPO in SBS 2008 that deploys and updates software. Unfortunately, one of our VPN users lives out in the sticks and has severe latency, so the start up processes and updates time out and take an awfully long time, if they ever complete at all. I'd like to apply this GPO to all auth'd users except for him, without having to create a new custom user group. Any thoughts?

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  • Spotlight Infinite Indexing issue (external data drive)

    - by Manca Weeks
    This is an external drive, formerly a boot drive which is now in use only to access music files (sibelius, audio, midi, live, logic etc.) without transferring the data into a new boot system, partly because of the issue I am about to describe, but mostly because the majority of the data is mainly there for archival purposes. The user is a composer and prominent musician and needs to be able to rehash the data at will. I have tried several things - here is a list: - make complete filesystem clone with antonio diaz's ddrescue - run Disk Warrior on copy, repair whatever errors occurred - wipe out all ACLs on entire drive - set all permissions to the same value - wide open 777 - remove any system data (applications, system files, including hidden files to the best of my knowledge) by selecting only non-system/app data and using Carbon Copy Cloner to put only the data of interest onto a newly formatted drive - transfer data to newly formatted drive folder by folder, resetting the spotlight index in between adding each to observe for issues (interesting here is that no issues occurred except for in Documents folder - when I transferred only the Documents folder to a newly formatted drive on its own - no trouble. It appears almost as thought it may not be the content but the quantity or specific combination of data that results in problems) - use DataRescue to transfer the data to yet another newly formatted drive to expose any missed hidden files Between each of the above steps I stopped Spotlight (search for anything beginning with md in Activity Monitor - All Processes and quitting it), deleted the .Spotlight-V100 directory from the affected drive. Restart Splotlight indexing by adding drive to Spotlight privacy list and removing it. In each case the same issue occurs - Spotlight begins indexing normally (or so it seems), then the index estimated time increases, usually to 4 hours remaining. This is where it gets stuck and continues to predict 4 hours remaining but never finishes. Sometimes I can't eject the drive and have to quit the md.. processes from Activity Monitor to be able to eject the drive without Force Eject. Once I disconnect the drive after the 4 hours remaining situation - if I reattach it, Spotlight forever estimates remaining time and never gets going again. So there it is. It is apparently not a filesystem issue, not a permissions issue and not tied to any particular piece of hardware or protocol (used USB and FW drives). I have tried this on several machines (3 to be precise) and in 10.5.8 and 10.6.5. Simply disabling Spotlight on this volume is not an option because the owner has no clue where things are as the data on the volume dates back to music projects and compositions from 2003 and before. He needs to be able to query for results. Anyone got any ideas? Thanks, M

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  • Windows 7 sidebar, where is it?

    - by Martti Laine
    Hello I installed Win7 a while ago, and now I'm wondering if there is no sidebar in Win7? I can't find it, running "sidebar" (win+r) doesn't find it. It's not in the processes either. Is there a way to install it? Martti Laine

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  • Untraceable malicious browser calls

    - by MaximusOMaximus
    I installed Fiddler 4 Beta to do some HTTP tracing. I found a lot of calls being made to sites like : facebook, collegehumor and a bunch of other sites I've never visited. Could not trace what/who is initiating these calls as I do not see any Windows Processes. No one else is connected to my network. I use both Google Chrome and IE10 on a Windows 7 box. Please help me tracing and removing these malicious HTTP calls.

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  • Varnish -> Nginx -> Apache a good idea?

    - by Zoran Zaric
    Hey, I'm thinking about the architecture for a new Webserver. Would having Varnish as a cache in front of Nginx as a reverse-proxy and serving static files in front of apache for all heavy lifting be a good idea? I'm going to run php and ruby on rails applications. Will there be too much overhead passing php requests to apache through two other processes? Thanks a lot!

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  • killing all instances of chrome on the command line?

    - by Fedor
    In some cases killing a single tab/process doesn't do it and I need to close Chrome entirely. Since Chrome has multiple processes, how can I close all of them at once? I know that... pgrep chrome returns all the pids, can someone tell me a trick that would allow me to close all of them by feeding them to another command or merging them to a csv or something?

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  • Print ssh and su chain

    - by user1824885
    Is there a way to show the complete ssh and su chain in bash? For example. In Server A as user aa: su - ab ssh ba@B su - bb Thus, I would like a command that prints something like this: 1 bash aa in A 2 su ab in A 3 ssh ba in B 4 su bb in B I tried pstree but it does not print the users and only works with the processes of the last ssh'ed server: $ pstree | grep -C 5 pstree serversshd---sshd---sshd---bash---su---bash-+-grep | `-pstree Thanks and regards.

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  • SQL Server 2005 on laptop. Not sure if I can delete

    - by WebDevHobo
    I have SQL Server 2005 on this laptop. I probably got installed along with Visual Studio. The thing is, I don't use it and it's constantly running. Process Explorer reports that it has a virtual Size of 1.5 GB. I want to uninstall this, but I'm not sure if there are any other processes dependent on this.

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  • Dedicated hard disk for Informix SE dbname.dbs files & dedicated ramdisk for /tmp files.

    - by Frank Computer
    INFORMIX-SE 7.2: I would like to dedicate a hard disk, exclusively for my dbname.dbs directory which holds all the .dat and .idx files, and create a ramdisk for my /tmp temporary files in order to improve performance. I would also like to strip down the OS from any unecessary files and processes to minimize overhead for my dedicated application. Is this a good idea and are there any roadmaps for accomplishing this?

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  • Is there any way to execute something when closing the laptop's lid?

    - by Matias
    I'm wondering if there is any way to execute a program, run some command or anything else when closing the laptop's lid. My question aims to be generic, both for Windows and Linux. Something useful should be locking the laptop when closing the lid (Win + L in windows), or running expensive processes such as antivirus analysis etc. without doing it manually before closing the lid.

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  • Awesome WM: Goodbye UI

    - by Håvard Geithus
    Sometimes some of my UI's disappear, but the processes they belong to lives on. So far it has happened to gnome-terminal, emacs, eclipse and evince. I've only experienced this behavior with the Awesome Window Manager. Any ideas how to fix it? Update: It has also happened to a popped out Gmail chat window . When I close the main Gmail window, it warns me that the invisible chat window will also be closed.

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