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  • Install problems with XSendFile on Ubuntu

    - by Dan
    I installed the apache dev headers: sudo apt-get install apache2-prefork-dev Downloaded and compiled the module as outlined here: http://tn123.ath.cx/mod_xsendfile/ Added the following line to /etc/apache2/mods-available/xsendfile.load: LoadModule xsendfile_module /usr/lib/apache2/modules/mod_xsendfile.so Added this to my VirtualHost: <VirtualHost *:80> XSendFile on XSendFilePath /path/to/protected/files/ Enabled the module by doing: sudo a2enmod xsendfile Then I restarted Apache. Then this code still just provides me with an empty file with 0 bytes: file_path = '/path/to/protected/files/some_file.zip' file_name = 'some_file.zip' response = HttpResponse('', mimetype='application/zip') response['Content-Disposition'] = 'attachment; filename=%s' % smart_str(file_name) response['X-Sendfile'] = smart_str(file_path) return response And there is not in the Apache error log that pertains to XSendFile. What am I doing wrong?

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  • Why does my system use so much cache?

    - by Dave M G
    Previously, on my desktop computer running Ubuntu 14.04, I had 4GB RAM, which I thought should be plenty. However, after being on for a while, my computer would seem to get slow. I have a system resource monitor app in my Gnome panel, which I assume represents the available RAM (?). It shows a dark green area as being "Memory", and a light green area as "Cache". The "Cache" would slowly grow until it filled the whole graph, and then programs would get slow to load, or it would take a while to switch programs. I could alleviate the problem somewhat with this command, but eventually the computer cache fills up again, so it's only a bandaid: sudo sh -c "sync; echo 3 > /proc/sys/vm/drop_caches" So, I figured I'd get more RAM, so I replaced one 2GB stick with an 8GB stick, and now I have 10 GB ram. And my "cache" still slowly maxes out and my computer slows as a result. Also, sometimes the computer starts out with "cache" maxed when I first boot and log in. Not always though, I don't know if there's a pattern that determines why it happens. Why is Ubuntu using up so much cache? Is 10GB not enough for Ubuntu? Here's what my system monitor looks like in my Gnome panel. The middle square shows RAM usage. The light green area is the "cache": This is my memory and swap history, which doesn't seem to include any information about "cache". I realize at this point I'm not totally clear on the difference between "cache" and "swap":

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  • How to translate formulas into form of natural language?

    - by Ricky
    I am recently working on a project aiming at evaluating whether an android app crashes or not. The evaluation process is 1.Collect the logs(which record the execution process of an app). 2.Generate formulas to predict the result (formulas is generated by GP) 3.Evaluate the logs by formulas Now I can produce formulas, but for convenience for users, I want to translate formulas into form of natural language and tell users why crash happened.(I think it looks like "inverse natural language processing".) To explain the idea more clearly, imagine you got a formula like this: 155 - count(onKeyDown) >= 148 It's obvious that if count(onKeyDown) 7, the result of "155 - count(onKeyDown) = 148" is false, so the log contains more than 7 onKeyDown event would be predicted "Failed". I want to show users that if onKeyDown event appears more than 7 times(155-148=7), this app will crash. However, the real formula is much more complicated, such as: (< !( ( SUM( {Att[17]}, Event[5]) <= MAX( {Att[7]}, Att[0] >= Att[11]) OR SUM( {Att[17]}, Event[5]) > MIN( {Att[12]}, 734 > Att[19]) ) OR count(Event[5]) != 1 ) > (< count(Att[4] = Att[3]) >= count(702 != Att[8]) + 348 / SUM( {Att[13]}, 641 < Att[12]) mod 587 - SUM( {Att[13]}, Att[10] < Att[15]) mod MAX( {Att[13]}, Event[2]) + 384 > count(Event[10]) != 1)) I tried to implement this function by C++, but it's quite difficult, here's the snippet of code I am working right now. Does anyone knows how to implement this function quickly?(maybe by some tools or research findings?)Any idea is welcomed: ) Thanks in advance.

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  • Lessons From OpenId, Cardspace and Facebook Connect

    - by mark.wilcox
    (c) denise carbonell I think Johannes Ernst summarized pretty well what happened in a broad sense in regards to OpenId, Cardspace and Facebook Connect. However, I'm more interested in the lessons we can take away from this. First  - "Apple Lesson" - If user-centric identity is going to happen it's going to require not only technology but also a strong marketing campaign. I'm calling this the "Apple Lesson" because it's very similar to how Apple iPad saw success vs the tablet market. The iPad is not only a very good technology product but it was backed by a very good marketing plan. I know most people do not want to think about marketing here - but the fact is that nobody could really articulate why user-centric identity mattered in a way that the average person cared about. Second - "Facebook Lesson" - Facebook Connect solves a number of interesting problems that is easy for both consumer and service providers. For a consumer it's simple to log-in without any redirects. And while Facebook isn't perfect on privacy - no other major consumer-focused service on the Internet provides as much control about sharing identity information. From a developer perspective it is very easy to implement the SSO and fetch other identity information (if the user has given permission). This could only happen because a major company just decided to make a singular focus to make it happen. Third - "Developers Lesson" -  Facebook Social Graph API is by far the simplest API for accessing identity information which also is another reason why you're seeing such rapid growth in Facebook enabled Websites. By using a combination of URL and Javascript - the power a single HTML page now gives a developer writing Web applications is simply amazing. For example It doesn't get much simpler than this "http://api.facebook.com/mewilcox" for accessing identity. And while I can't yet share too much publicly about the specifics - the social graph API had a profound impact on me in designing our next generation APIs.  Posted via email from Virtual Identity Dialogue

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  • Better Method of Opening TTY Permissions

    - by VxJasonxV
    At work, I have a few legacy servers that I log into as root, and then su down to a user. I continue to run into an issue where after doing so, I am unable to run screen as this user. I don't want to open screen as root, because then I have to consciously su down the user every new shell, and I often forget. The question is, is there an easier resolution to this than I'm currently aware of? My current solution is to find my terminal pts number, then set it chmod 666. I'm looking for something akin to X11's xhost ACL management, if such a thing exists for this situation.

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  • RPC Server Unavailable When Trying to Join W2003 Server to W2003 Active Directory Domain

    - by Roel Vlemmings
    I have an Active Directory Domain with a Windows 2003 Standard SP2 Server as the DC. When trying to join an additional Windows 2003 Standard SP2 server to the domain I get message "The following error occurred attempting to join the domain 'My Domain'. The RPC Server is unavailable. The computer is actually added to the Active Directory Computers. I can even right-click and Manage it. I can access file shares from the DC on the other server and vice versa. I can ping the DC from this server and ping the server from the DC using the computer name. The time on both server is the same more or less to the second. RPC service is running on both servers. I can join other computers to the domain and there are no other issues with the domain. Windows Firewall disabled on both computers. NetSetup.LOG shows: NetpSetNetloginDomainCache: DSEnumerateDomainTrustsW failed 0x6ba I looked up this WIN32 Error Code: It is RPC_S_SERVER_UNAVAILABLE.

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  • Problems with icons and shutting down Ubuntu 12.04

    - by Anders
    I recently upgraded from 11-10 to 12.04 as a dual boot (Windows 7) and am having problems with shutting down. I installed from a CD that I burned from the iso file, and to get it to boot from the CD, I needed to install the special help program from Windows that would then recognize the CD as the system booted.The installation gave me my own user account as well as a guest account. For the User account there is no "gear" icon (in the upper RH side) from which to access the shut down menu. Interestingly the icons for the Home folder, the Ubuntu One folder, and the System Settings folder are missing, although there are blank places shows these names if the mouse cursor is positioned over these areas. They will even launch with the press of a key - but no icons are visible. For the Guest account, all of these icons are visible and usable. The problem that occurs in shutting down is that I need to leave the User account, move to the Guest account (so that I can access the top right "gear" icon that has the shut down menu item) and press the shut down button. The problem here is that when the shut own menu appears and I press the confirmation that I wish to shut down the computer, the page blanks (as one might hope in the process of closing down), and then pops up with the log in menu, giving the option of logging in as a User or as a Guest. So the questions are: 1) how do you reinstate the far right top icon from which you can access the shut down drop down menu in the User account page. 2) how do you get the icons to display properly on the Left hand side (Home, Ubuntu One, System Settings, and Workspace Switcher) 3) how do you get the system to turn of when you press the shut down button! Boy oh boy! Thanks a bunch for any help!

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  • How to redirect (or Alias) jump page with Apache

    - by Meltemi
    I'm not an Apache expert but need to make a small change to a web server. We are introducing a "jump page" URL that is different from a primary URL (for tracking reasons). /productA/index.html /productA/jump_index.html Basically i want to log that jump_index.html was requested and then return index.html. I don't want the client to wait 8 seconds or so for a redirect. How should we be handling this? Simply symlink (or alias) the file in the filesystem? Use mod_alias Alias Match (if so how exactly)? something better still?

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  • Uninstall Dell Wave

    - by Onion-Knight
    The image we put on our company laptops includes the Dell Wave interface for Biometric log in. The Wave UI increases boot time by about 5 minutes (because it loads the fingerprint database(a feature I don't use)), so I'm trying to uninstall it, but with little success. There is no line-item in the Add/Remove Programs menu to formally delete it, nor is there a Service I can stop/remove to disable the Wave UI. I've tried looking online, but all I find instead are hits for Google Wave and virus-removal forums with HyjackThis dumps that include Dell Wave records. Any ideas?

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  • Redirect to ADFS login

    - by Patrick
    My company has switched to Office 365 and we like it, but we would really like for the ADFS single sign on to be more simplified. We have to go to login.microsoftonline.com then type in the username, then you have to click the link that appears at the bottom. Then you have to type in your username again and password. So we have come up with the idea that we could just redirect everyone to this page, but after lots of research into this, it seems like it's not possible to do a DNS redirect to a path. Does anyone know any other type of redirect that we could try? I'm thinking about trying to see if I can have a DNS entry go to our TMG and then have the TMG redirect to a path. But I'm not sure how the ADFS server knows where to go after that, so it might just log us in and not go anywhere. Any help will be greatly appreciated.

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  • Can I port forward to an established reverse ssh tunnel

    - by Ben Holness
    I have three computers, A, B and C A has initiated a reverse ssh tunnel to B: ssh -nTNx -p 443 -R 22222:localhost:22 [user]@[server] If I log in to B, I can use 'ssh -p 22222 localhost' and I get a login prompt for A. If I try 'ssh -p 22222 [public IP of B]', it doesn't work What I would like to be able to do is have C connect to A without needing to login to B. So from C I could 'ssh -p 22222 [public IP of B]' and I would get the login prompt for A. I am using debian and shorewall and I have a basic understanding of how things work. I have tried various combinations of REDIRECT and DNAT rules, but haven't had any luck. I have tried using the same port (22222) and a different port (forwarding 22223 from C to 22222 on localhost). Any ideas? Cheers, Ben

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  • Trying to set up OpenVPN server on a vps

    - by Austin
    I'm trying to set up an OpenVPN server on my VPS for myself when I'm in public places, using this tutorial, http://tipupdate.com/how-to-install-openvpn-on-ubuntu-vps/ However whenever I try to start the server, it gives me this, root@vps:~# /etc/init.d/openvpn start * Starting virtual private network daemon(s)... * Autostarting VPN 'server' [fail] The log contains this Tue Dec 11 10:53:32 2012 Diffie-Hellman initialized with 1024 bit key Tue Dec 11 10:53:32 2012 /usr/bin/openssl-vulnkey -q -b 1024 -m <modulus omitted> Tue Dec 11 10:53:33 2012 TLS-Auth MTU parms [ L:1542 D:138 EF:38 EB:0 ET:0 EL:0 ] Tue Dec 11 10:53:33 2012 ROUTE: default_gateway=UNDEF Tue Dec 11 10:53:33 2012 Note: Cannot open TUN/TAP dev /dev/net/tun: No such file or directory (errno=2) Tue Dec 11 10:53:33 2012 Note: Attempting fallback to kernel 2.2 TUN/TAP interface Tue Dec 11 10:53:33 2012 Cannot allocate TUN/TAP dev dynamically Tue Dec 11 10:53:33 2012 Exiting So obviously it's something to do with the tun, but I don't understand how to fix it. Thanks!

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  • SCO UNIX problem: "Cannot create /var/adm/utmp or /var/adm/utmpx"

    - by Maktouch
    Hey everyone, I have an old server that doesn't boot. I don't know the version of unix installed, but I see SCO UNIX. It stops with that error: UX:init: ERROR: Cannot create /var/adm/utmp or /var/adm/utmpx UX:init: ERROR: failed write of utmpx entry: " " UX:init: ERROR: failed write of utmpx entry: " " UX:init: INFO: SINGLE USER MODE After that message, it just stops. I cannot write or press anything. Even CTRL + ALT + DEL does not work. I cannot get into the system. I have tried booting with a DamnSmallLinux LiveCD but it does not recognize the file system on HDA. Is there a way to either log in as root or bypass this error? Thanks.

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  • Networking not working in Windows 7 - "The account specified for this service is different from the account specified for other services"

    - by tog22
    I have a homebuilt computer with a GA-Z68MA-D2H-B3 motherboard with a Realtek RTL8111E LAN chip. Ethernet was working fine in Windows 7 until I reinstalled this OS, but now it's stopped, while still working in other OSes. I've tried reinstalling drivers from both the Gigabyte and Realtek sites to no avail; I've also plugged in and installed an Asus USB-N13 wifi dongle and this doesn't work oddly. How can I diagnose and fix this issue? In 'Network and Sharing Center' says "The account specified for this service is different from the account specified for other services running in the same process" under the heading 'Unknown'. Following the advice at http://www.sevenforums.com/network-sharing/130159-dependency-service-group-failed-start.html#post1122627 I've gone to 'Control Panel= Admin Tools= Services' and ensured the services listed at that URL are started (one - IIRC 'Come+ Event System' refused to start as user 'Local services' so I've had to set it to log on with the 'Local system account'... I suspect this may be part of the problem).

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  • Cannot install SQL Server (2012) PowerPivot for SharePoint, always fails Sharepoint Version check

    - by ProfessionalAmateur
    Trying to install a fresh install of Sharepoint 2010 (w/ SP1) and SQL Server 2012 PowerPivot for Sharepoint. The prerequisites clearly show that Sharepoint 2010 SP1 is needed, which we have installed. However after when trying to install the SQL Server portion we consistently fail the rule SharePoint version requirement for PowerPivot for SharePoint' validation in theSQL Server` install process. Here is the process we are following: 1. install Sharepoint 2010 2. install Sharepoint 2010 SP1 3. install SQL Server 2012 PowerPivot for SharePoint Here is a screen shot of the error and the log file error. We are completely stuck at this point, anyone run into this before?

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  • Oracle 10.2.0.1 --> 10.2.0.4 patchset errors on Advanced Queuing tables. Serious or not?

    - by hurfdurf
    We're running Oracle on RHEL 5.4 64-bit. We recently did an upgrade from 10.2.0.1 to 10.2.0.4. Many errors were generated during the upgrade (sample listed below from trace.log) but during application testing afterward everything seemed fine (clean EXP, inserts, updates, deletes, etc.). The errors look like they are all related to Advanced Queuing tables and views. We are not using replication at all, this is a simple single instance db. ORA-24002: QUEUE_TABLE SYS.AQ_EVENT_TABLE does not exist ORA-24032: object AQ$_AQ_SRVNTFN_TABLE_T exists, index could not be created ORA-24032: object AQ$_ALERT_QT_S exists, index could not be created for queue ORA-06512: at "SYS.DBMS_AQADM_SYSCALLS", line 117 ORA-06512: at "SYS.DBMS_AQADM_SYS", line 5116 Is this worth worrying about, and if so, how do I go about cleaning up/recreating the corrupted and/or missing objects?

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  • How To Backup Of MySQL Database Using PhpMyAdmin

    - by Jyoti
    It is very important to do backup of your MySql database, you will probably realize it when it is too late. A lot of web applications use MySql for storing the content. This can be blogs, and a lot of other things. When you have all your content as html files on your web server it is very easy to keep them safe from crashes, you just have a copy of them on your own PC and then upload them again after the web server is restored after the crash. All the content in the MySql database must also be backed up. If you have spent a lot of time making the content and it is only stored in the Mysql server, you will feel very bad if it gets lost for ever. Backing it up once every month or so makes sure you never loose too much of your work in case of a server crash, and it will make you sleep better at night. It is easy and fast, so there is no reason for not doing it. Step 1: Log into phpMyAdmin on your server. Step2: You can select the database that you would like to backup from the drop-down menu called Database. Step 3: A new page will be loaded in phpMyAdmin showing the selected database. In order to proceed with the backup click on the Export tab. Step 4: The options that you should select apart from the default ones are Save as file which will save the file locally to your computer in an .sql format and Add DROP TABLE which will add the drop table functionality if the table already exists in the database backup as shown below. Step 5: Click on the Go button to start the export/backup procedure for your database. A download window will pop up prompting for the exact place where you would like to save the file on your local computer. It is possible that the download starts automatically. This depends on your browser’s settings.

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  • How to see who is using my wifi

    - by Bakhtiyor
    Dear all. Such a question. I have WiFi router at home and would like to know if there is any way to know who is connected to my WiFi network and using it. My WiFi network is password protected but still there could be chances that neighbors crack it and could use my WiFi for free. For this reason I would like to know is there is any tool to inspect the log of WiFi router in order to know which computers are connecting to it. Thanks a lot beforehand.

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  • apache2 mod_rewrite enable, but not working

    - by user611478
    I have enabled mod_rewrite on my server and confirmed it using phpinfo() and it shows as enabled. I have the following in my httpd.conf file: ServerName 172.16.1.114 RewriteEngine on RewriteRule ^/test$ /index.php I've tried the rewrite rule on another server and it works as expected. No errors are thrown to my apache error log and it restarts cleanly. When I try the page it 404s and doesn't load index.php I'm sure this must be a simple problem, but I am at a loss on how to figure it out. Any help is appreciated.

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  • What happens to remounted data/directories

    - by cauon
    According to suggestions in this post I am trying to improve my system to run better with a Solid State Drive. But regarding to RAMdisks and /etc/fstab usage I have some understanding problems coming up. So let's say I add the following lines to /etc/fstab tmpfs /tmp tmpfs defaults,noatime,nodiratime,mode=1777 0 0 tmpfs /var/spool tmpfs defaults,noatime,nodiratime,mode=1777 0 0 tmpfs /var/tmp tmpfs defaults,noatime,nodiratime,mode=1777 0 0 tmpfs /var/log tmpfs defaults,noatime,nodiratime,mode=0755 0 0 I know that on startup these locations should now get mounted into the RAM (hopefully). But what happens to the physical space that was mounted on those places before? Is it gone? Will it be back when I edit my /etc/fstab back to the Version without tmpfs? Will the space still be allocated on my SSD in a way that I can't use it for any other data? Sometimes it is suggested to add the following line, too: none /var/cache aufs dirs=/tmp:/var/cache=ro 0 0 What does this actually do? I noticed that /var/cache takes almost 1GB of space on my harddisk. So should i clear the directory before activating this line? (this is related to the former question) This causes me some confusions and I hope you can give me some clarifications. UPDATE I've downloaded a image with 600MB in size into /tmp that is mounted with the tmpfs settings above. Now I wanted to compare the RAM usage before and after the download. I expect the RAM usage to be increased by 600MB after the download. But the System Monitoring Tool showed me no changes at all. How can this be? Does tmpfs work other than I actually expect it to?

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  • Sudo yum seems to fail on CentOS, but works fine after sudo -i

    - by Aron Rotteveel
    I am currently having some trouble with yum through sudo. For some reason, it does not seem to work: aron@graviton [/var/log]# sudo yum clean all There was a problem importing one of the Python modules required to run yum. The error leading to this problem was: /usr/lib64/python2.4/lib-dynload/datetime.so: failed to map segment from shared object: Cannot allocate memory Please install a package which provides this module, or verify that the module is installed correctly. It's possible that the above module doesn't match the current version of Python, which is: 2.4.3 (#1, Sep 3 2009, 15:37:37) [GCC 4.1.2 20080704 (Red Hat 4.1.2-46)] If you cannot solve this problem yourself, please go to the yum faq at: http://wiki.linux.duke.edu/YumFaq The strange thing, however, is that it works fine when I gain root privileges through sudo -i first. Any ideas what might be causing this problem?

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  • Windows 7 Printing to a network printer

    - by JohnyV
    We have a 2008 server as our print server. Clients that use windows xp with a logon script to map have no problems printing. When I test printing to a network printer on a windows 7 machine it works fine up to a few machines as soon As i get 12-15 workstations trying to print, when they log in they get the yellow exclamation mark and needs troubleshooting against the printer name. It is being deploy by group policy. I have tried to deploy it by group policy also by group policy preferences and by using a script and i get the same error whatever i try. Does anyone have any suggestions to try and troubleshoot? Once again Windows xp clients have no issues printing at all. It is only windows 7 clients. Thanks

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  • Local Area Connection in Slacware 13

    - by asdasd
    I have windows xp and slackware 13 on one computer, and the ISP provided me a new modem. There was manual how to configure it, so i start the web browser and typed it's ip address 192.168.1.1 and the web interface of the modem appeared so i logged in, that was easy. But under slackware, i don't know how to enter in the modem config / web interface. I type in 192.168.1.1 but it's not working. Here's the output of ifconfig eth0 : eth0 Link encap:Ethernet HWaddr 00:a1:b0:01:18:28 inet addr:169.254.73.8 Bcast:169.254.255.255 Mask:255.255.0.0 UP BROADCAST MULTICAST MTU:1500 Metric:1 RX packets:0 errors:0 dropped:0 overruns:0 frame:0 TX packets:0 errors:0 dropped:0 overruns:0 carrier:0 collisions:0 txqueuelen:1000 RX bytes:0 (0.0 B) TX bytes:0 (0.0 B) Interrupt:17 Memory:febff400-febff4ff How can i log in into the modem from linux, i.e. find it's assigned ip under slackware ? Thank you.

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  • Cannot start `Routing and Remote Access Service` and it's dependencies

    - by ahmadali shafiee
    I tried to start Routing and Remote Access Service but I've got an error says the dependency service or group failed to start then I tried to start Remote Access Connection Manager (one of RRAS's dependencies) and the error way same. then I tried to start The Secure Socket Tuning Protocol Service but there was an error says that the the service started then stopped! the errors form event log is here: The Remote Access Connection Manager service depends on the Secure Socket Tunneling Protocol Service service which failed to start because of the following error: The operation completed successfully. The Secure Socket Tunneling Protocol Service service entered the stopped state. The Routing and Remote Access service depends on the Remote Access Connection Manager service which failed to start because of the following error: The dependency service or group failed to start. sort by date Does anyone know how can I resolve the problem?

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  • Visible Keylogger (ie not evil)

    - by Ben Haley
    I want keylogging software on my laptop for lifelogging purposes. But the software I can find is targeted towards stealth activity. Can anyone recommend a keylogging software targeted towards personal backup. Ideal Functionality Runs publicly (like in the task bar). Easy to turn off (via keyboard shortcut is best... at least via button click) Encrypted log Fast Free Cross platform ( windows at least ) The best I have found is pykeylogger which does not attempt to be stealthy, but does not attempt to be visible either. I want a keylogger focused on transparency, speed, and security so I can safely record myself. *note: Christian has a similar question with a different emphasis

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