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• Switching from prefork MPM to worker MPM + php-fpm on ubuntu

  - by Shane

  All tutorials I found were how to fresh install worker MPM + PHP-FPM, since my wordpress blog's already up and running with prefork MPM, correct me if I'm wrong in the simulated installation process: I'm on ubuntu and according to some tutorials, the following lines would do all the tricks: apt-get install apache2-mpm-worker libapache2-mod-fastcgi php5-fpm php5-gd a2enmod actions fastcgi alias Then you setup configuration in /etc/apache2/conf.d/php5-fpm.conf: <IfModule mod_fastcgi.c> AddHandler php5-fcgi .php Action php5-fcgi /php5-fcgi Alias /php5-fcgi /usr/lib/cgi-bin/php5-fcgi FastCgiExternalServer /usr/lib/cgi-bin/php5-fcgi -host 127.0.0.1:9000 -pass-header Authorization </IfModule> After all these, restart: service apache2 restart && service php5-fpm restart Question: 1) Would it cause any down time in the whole process for previously running sites with prefork MPM? 2) Do you have to change any already existent configuration files like php or mysql or apache2(would they take effect immediately after the switch without you doing anything)? 3) I've already have apc up and running, do you have to re-install/re-configure it after the switch? 4) How do you find out if apache2 is working in worker MPM mode as expected? Thanks a lot!

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• ntpd on Fedora Core 6 with high negative time reset values

  - by Mark White

  The basic problem is we have a FC6 server instance running on a virtual machine, and the system time seems to have been slowly varying until it is now causing a problem. The server runs 24/7 and has been up for 155 days. It has been changed to show GMT, and reports the time as (example) 00:15:15 GMT whereas the actual time is 00:00:00 GMT. This is an offset of 915 seconds. selinux has been changed to 'setenforce 0' for testing and I am running as root. I stop the ntpd service and change the time in System|Administration|Date & Time. The time still shows the same with 'date' in bash. There are no error logs. I change the date with 'date --set' in bash. The response confirms the changed date. I run 'date' and the incorrect date is shown. There are no error logs. I start the ntpd service and /var/log/messages shows success with 'time reset -915.720139s'. The date remains unchanged. ntpq -p shows three three time servers all have offsets of around -915 seconds. I stop ntpd service and try 'ntpd -gqx' and get the same result as above - success, but a large negative time reset. I've tried varying combinations of the above, and a few more settings in System|Administration|Date & Time - no change. I just need to reset the system time to GMT. No offset. But I can't wait for ntpd to slew the time over the next few weeks. Any advice is welcome, cheers! Surely this shouldn't be this difficult... Mark...

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• SuPHP custom php.ini doesn't get read

  - by Mathieu Dumoulin

  Took me about 4 hours to get a FastCGI + SuPHP running off Ubuntu 11.10 and i'm now happy that it works mighty fine except for ONE big problem. Custom php.ini's don't seem to load. I tried changing some options and then firing off a phpinfo() and nothing changes in the phpinfo() which leads me to think that there is definitely a problem with the loading of the configuration file. <IfModule mod_suphp.c> AddHandler x-httpd-php .php <Location /> SuPHP_AddHandler x-httpd-php </Location> suPHP_ConfigPath /home/mdumoulin/Documents/tests/tests suPHP_Engine on </IfModule> As you can see, i took great care in making sure i wasn't referencing the php.ini file itself but the directory of the vhost. In the php.ini located in "/home/mdumoulin/Documents/tests/tests/php.ini", you can find: [PHP] error_reporting = E_ALL & ~E_DEPRECATED & ~E_NOTICE display_errors = Off And the log in /var/log/suphp/suphp.log doesn't contain anything relevant, (only old errors that occured before this post while i was testing suphp... So i'm stumped there, dunno what more i can do! Anyone got an idea? EDIT: FINALY, got time to work on this, i disabled FCGI and only enabled SuPHP but after restarting i still see "Server API: CGI/FastCGI". Is this what i should be getting or not? I believe that it's normal i get CGI since SUPHP works with a CGI... But i'm not too sure anymore...

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• Is it worthwhile to block malicious crawlers via iptables?

  - by EarthMind

  I periodically check my server logs and I notice a lot of crawlers search for the location of phpmyadmin, zencart, roundcube, administrator sections and other sensitive data. Then there are also crawlers under the name "Morfeus Fucking Scanner" or "Morfeus Strikes Again" searching for vulnerabilities in my PHP scripts and crawlers that perform strange (XSS?) GET requests such as: GET /static/)self.html(selector?jQuery( GET /static/]||!jQuery.support.htmlSerialize&&[1, GET /static/);display=elem.css( GET /static/.*. GET /static/);jQuery.removeData(elem, Until now I've always been storing these IPs manually to block them using iptables. But as these requests are only performed a maximum number of times from the same IP, I'm having my doubts if it does provide any advantage security related by blocking them. I'd like to know if it does anyone any good to block these crawlers in the firewall, and if so if there's a (not too complex) way of doing this automatically. And if it's wasted effort, maybe because these requests come from from new IPs after a while, if anyone can elaborate on this and maybe provide suggestion for more efficient ways of denying/restricting malicious crawler access. FYI: I'm also already blocking w00tw00t.at.ISC.SANS.DFind:) crawls using these instructions: http://spamcleaner.org/en/misc/w00tw00t.html

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• Deciphering an IIS6 Httperr log file

  - by smackaysmith

  We have a Windows 2003 R2 SP2 server with iis6 that is creating a 1024kb httperr file every minute. I can't figure out what I'm looking at. Here's a snippet: 2010-03-24 13:15:05 10.53.2.35 1667 10.53.2.12 80 HTTP/1.1 PUT /hserver.dll?&V01|&IMAC=0080646077AB|CID=32|CN=LWT0080646077AB|ED=1|IP=10.53.2.35|SM=255.255.255.0|GW=10.53.2.1|SN=10.53.2.255|DM=logs.com|1D=10.53.2.12|2D=10.101.2.12|0D=1|AL=/usr/sbin/netxserv|AV=4.1.0.0|CP=VIAüEstherüprocessorüü800MHz|CPS=800|RM=190512|B1=1.18|PD2=1024x768x16ü@ü60Hz|IM=6.6.2-02|CI=3600|SN#=6KHDG301300|OS=23|VI=1|P1=24|TZO=-301|TZ=CDT|FS=128|MD=2003-04|CO=|LO=|AP0=BaseüSystem|NA|6.6.2-02|AP1=RapportüAgent|NA|4.1.0-3.26|AP2=TrueType|NA|6.8.0-3.4|AP3=WebFonts|NA|2.0.4-3.6|AP4=TrueTypeüFonts|NA|6.8.0-3.5|AP5=Network_login|NA|1.0.0-1.0.3|AP6=ScreenüSaver|NA|3.13|AP7=DMonitor|NA|1.0.0-0.4.0|AP8=MozillaüFirefox_15|NA|1.5.0.8-3.6|AP9=RemoteüShadow|NA|3.17|AP10=RemoteüDesktop|NA|1.6.0-1.0|AP11=SNMP|NA|5.1.3.1-3.13|AP12=LinuxüPrinting|NA|3.8.27-3.33|AP13=SSH|NA|3.8.1-3.25|AP14=ThinPrint|NA|6.2.87-0.2|AP15=XDMCP|NA|6.8.0-3.29|AP16=Ericom|NA|8.2.0-3.29|AP17=Daylightüsavingütimeüupdate|NA|1.1.0-1.0.0| 411 - LengthRequired - What on earth am I looking at? Nothing in the system or app logs. Finally, in iis manager, Default Web Site label has boxes instead of spaces. Very odd.

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• Google respond differently to two identical nginx setups and 200 codes; any ideas?

  - by Yuji Tomita

  I'm rather confused... I have a linode.com VPS which has been cloned recently, so the settings are the same between nginx servers. One lives on a dev subdomain, one on a www. I'm trying to run a google experiment on my live server, which claims: Web server rejects utm_expid. Your server doesn't support added query arguments in URLs. My logs show on the dev server where it works: 74.125.186.32 - - [13/Sep/2012:13:33:45 -0700] "GET /product/iphone-case/?utm_expid=25706866-0 HTTP/1.1" 200 12521 "-" "Google_Analytics_Content_Experiments 74.125.186.32 - - [13/Sep/2012:13:33:45 -0700] "GET /product/iphone-case/?ab_reviews=True&utm_expid=25706866-0 HTTP/1.1" 200 14679 "-" "Google_Analytics_Content_Experiments My production server shows google making a second request. 74.125.186.41 - - [13/Sep/2012:13:34:49 -0700] "GET /product/iphone-case/?ab_reviews=on&utm_expid=25706866-1 HTTP/1.1" 200 12104 "-" "Google_Analytics_Content_Experiments 74.125.186.41 - - [13/Sep/2012:13:34:49 -0700] "GET /product/iphone-case/?utm_expid=25706866-1 HTTP/1.1" 200 12122 "-" "Google_Analytics_Content_Experiments 74.125.186.41 - - [13/Sep/2012:13:34:49 -0700] "GET /product/iphone-case/ <--- A second request for some reason. HTTP/1.1" 200 12522 "-" "Google_Analytics_Content_Experiments I'm not sure how google determines why it needs to send a second request without the querystring. The original request has clearly sent a 200 OK status response. Does anybody have any suggestions where to look next? The HTML (compared by diff) on the two pages is exactly the same.

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• Windows Virtual Machines will not run

  - by jlego

  I'm trying to setup a few virtual machines to use for testing websites in the various old versions of IE. I had Microsoft Virtual PC working on an older machine using XP mode and 2 other VHD's from Microsoft that allowed me to test in IE6-IE8. I've recently gotten a new work machine and am trying to set up the VMs again for testing, however nothing seems to be working. Both the old and the new system run Windows 7 64-bit Ultimate with AMD processors. I downloaded Virtual PC & XP mode from here http://www.microsoft.com/windows/virtual-pc/download.aspx and go through the installation process. XP mode is installed, but when I try to run it it goes through the initial setup process only to fail when it is almost complete with the error "Cannot Complete Setup". (After googling I see that this might be a conflict with my processor) I download other VHD's from here http://www.microsoft.com/windows/virtual-pc/download.aspx in order to get the other versions of IE and try to set those up in Virtual PC as well. I click on them to start the machine and both Windows 7 with IE8 and Windows Vista with IE7 just hang at a black screen. I try to use Virtual Box instead, and I get Windows XP with IE6 running, but I have no internet connection in the VM. I try all different settings and try to google the correct settings but nothing seems to work. When I load the VM, XP shows that its found new hardware but it needs the drivers. One of these pieces of hardware is the network adapter, but I can't connect to the internet to download the driver in the guest OS. VirtualBox tells me I need to install extensions in order for things to function properly. I go through the installation process in the guest OS and restart the VM, however now XP is asking for validation and I can't access the VM. I try installing the other 2 OS (Vista & 7) but I get a BSOD right after the startup screen appears and the VM restarts itself. I'm getting so frustrated trying to make this work, I would really appreciate any assistance on getting the VMs up and running or any alternatives for testing websites in Internet Explorer.

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• Restricting memory area for linux kernel

  - by user1066789

  I am running ltib linux on P1022RDK (P1022 Core) platform. I have 512 MB = 0x20000000 memory. I want my linux kernel to use second half of the board memory (i.e from 256 MB to 512 MB) and want first half of memory to be reserved for some other purpose. For this I am building linux kernel using ltib. For that purpose I am setting following kernel configuration. Please suggest if I am doing it the right way. CONFIG_LOWMEM_SIZE = 0x10000000 # 256 MB CONFIG_PHYSICAL_START = 0x10000000 # Starting from 256MB (second half of memory) On the Uboot I am loading the kernel as following way setenv loadaddr 0x11000000 # Kernel base = 0x10000000 + 0x01000000 (offset) setenv fdtaddr 0x10c00000 # Kernel base = 0x10000000 + 0x00c00000 (offset) bootm $loadaddr - $fdtaddr My kernel Load address is 0x10000000 & kernel entry point is 0x10000000 Doing above configuration / steps my kernel stuck at following on Uboot ## Booting kernel from Legacy Image at 11000000 ... Image Name: Linux-2.6.32.13 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3352851 Bytes = 3.2 MB Load Address: 10000000 Entry Point: 10000000 Verifying Checksum ... OK ## Flattened Device Tree blob at 10c00000 Booting using the fdt blob at 0x10c00000 Uncompressing Kernel Image ... OK ================ >> It should uncompress FDT here & continue ============== Any thoughts ?

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• Restricting memory area for linux kernel

  - by user1066789

  I am running ltib linux on P1022RDK (P1022 Core) platform. I have 512 MB = 0x20000000 memory. I want my linux kernel to use second half of the board memory (i.e from 256 MB to 512 MB) and want first half of memory to be reserved for some other purpose. For this I am building linux kernel using ltib. For that purpose I am setting following kernel configuration. Please suggest if I am doing it the right way. CONFIG_LOWMEM_SIZE = 0x10000000 # 256 MB CONFIG_PHYSICAL_START = 0x10000000 # Starting from 256MB (second half of memory) On the Uboot I am loading the kernel as following way setenv loadaddr 0x11000000 # Kernel base = 0x10000000 + 0x01000000 (offset) setenv fdtaddr 0x10c00000 # Kernel base = 0x10000000 + 0x00c00000 (offset) bootm $loadaddr - $fdtaddr My kernel Load address is 0x10000000 & kernel entry point is 0x10000000 Doing above configuration / steps my kernel stuck at following on Uboot ## Booting kernel from Legacy Image at 11000000 ... Image Name: Linux-2.6.32.13 Image Type: PowerPC Linux Kernel Image (gzip compressed) Data Size: 3352851 Bytes = 3.2 MB Load Address: 10000000 Entry Point: 10000000 Verifying Checksum ... OK ## Flattened Device Tree blob at 10c00000 Booting using the fdt blob at 0x10c00000 Uncompressing Kernel Image ... OK ================ It should uncompress FDT here & continue ============== Any thoughts ?

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• Verify client certificate CN in Tomcat(APR)

  - by Petter

  I'm running a tomcat installation with the APR libraries installed (with the OpenSSL HTTPS stack that comes with it). What I'm trying to do is to lock a specific HTTPS connector down to users of a specific certificate. Adding client certificate verification is no issue, but I can't get it to validate against a specific Common name only. I was perhaps a bit naïve and thought the mod_ssl attribute SSLRequire typically used in Apache Httpd would work, but that property is not recognized by the Tomcat implementation. (http://tomcat.apache.org/tomcat-7.0-doc/config/http.html#SSL%20Support points to some mod_ssl docs, but the Tomcat implementation does not seem to cover all aspects of mod_ssl). I can get this to work by using the Java version of the connector instead of APR (losing some performance) and just add a trust store with that one certificate in it. However, using openssl without the SSLRequire expressions, I'm not sure how to do this with Tomcat7 (on Windows if that matters). <Connector protocol="HTTP/1.1" port="443" maxThreads="150" scheme="https" secure="true" SSLEnabled="true" SSLCertificateFile="mycert.pem" SSLCertificateKeyFile="privkey.pem" SSLCACertificateFile="CABundle.pem" SSLVerifyClient="require" SSLProtocol="TLSv1" SSLRequire="(%{SSL_CLIENT_S_DN_CN} eq &quot;host.example.com&quot;)"/> Can you suggest a way to make this work using Tomcat/APR/OpenSSL?

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• AutoHotkey - Organizing hotkeys so as to use Several hotkeys optimally

  - by Stenemo

  My question is how to structure key combinations in script below most effectively using AutoHotkey. Having searched for exactly how to do this for hours I figured I should post here so others can at least find this solution if they are trying to do the same: http://www.autohotkey.com/board/topic/90013-solved-wasd-fna-left-fnalta-home-fnctrla-ctrl-left-etc/ and How to combine three keys as a hotkey with Autohotkey? My Question is how to use this method most effectively, and is not answered in those threads. My idea would be to use this for everything related to up (etc), e.g.: ; Up Combinations: Ctrl Up, SHIFT + Up, SHIFT + Ctrl Up, [Alt/win + Up easily added and organized using this system] CapsLock & w:: GetKeyState, stateCtrl, LCtrl GetKeyState, stateShift, LShift GetKeyState, stateWin, LWin GetKeyState, stateAlt, LAlt if stateCtrl = D if stateShift = D if stateWin = D Send ^+#{Up}; Ctrl + SHIFT + Win + Up else Send ^+{Up} ; Ctrl + SHIFT + Up else if stateWin = D Send ^#{Up} ; Ctrl + Win + Up else Send ^{Up} ; Ctrl Up else if stateShift = D Send +{Up} ; SHIFT + Up else if stateWin = D Send #{Up} ; Win + Up else if stateAlt = D Send !{Up} ; Alt + Up else Send {Up} ; Up return Also, if there is a better way to do this, that would be great. E.g.: *CapsLock & w:: send {Up} Does almost exactly the opposite of what I want (sends up even if other modifiers are held down). When I hold e.g. control at the same time, I want it to do control + up. Have I missed such a AutoHotkey command? If anyone has a better way to do this that would be great.

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• Passing two arguments to a command using pipes

  - by firebat

  Usually, we only need to pass one argument: echo abc | cat echo abc | cat some_file - echo abc | cat - some_file Is there a way to pass two arguments? Something like {echo abc , echo xyz} | cat cat `echo abc` `echo xyz` I could just store both results in a file first echo abc > file1 echo xyz > file2 cat file1 file2 But then I might accidentally overwrite a file, which is not ok. This is going into a non-interactive script. Basically, I need a way to pass the results of two arbitrary commands to cat without writing to a file. UPDATE: Sorry, the example masks the problem. While { echo abc ; echo xyz ; } | cat does seem to work, the output is due to the echos, not the cat. A better example would be { cut -f2 -d, file1; cut -f1 -d, file2; } | paste -d, which does not work as expected. With file1: a,b c,d file2: 1,2 3,4 Expected output is: b,1 d,3 RESOLVED: Use process substitution: cat <(command1) <(command2) Alternatively, make named pipes using mkfifo: mkfifo temp1 mkfifo temp2 command1 > temp1 & command2 > temp2 & cat temp1 temp2 Less elegant and more verbose, but works fine, as long as you make sure temp1 and temp2 don't exist before hand.

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• Outlook sends uninvited images as attachments

  - by serhio

  Outlook is always sending along 2 pictures (image001.png and image002.gif) with my mails. Even if I don't attach any images. How do I fix this? Thanks. EDIT - SIGNATURE The HTML of my signature: <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"> <HTML xmlns:o = "urn:schemas-microsoft-com:office:office"><HEAD><TITLE>Company default Signature</TITLE> <META content="text/html; charset=windows-1252" http-equiv=Content-Type> <META name=GENERATOR content="MSHTML 8.00.6001.18854"></HEAD> <BODY> <DIV align=left><FONT color=navy size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"> <P class=MsoNormal align=left><BR>Cordialement,&nbsp;</SPAN></FONT><FONT color=navy size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt"><o:p>&nbsp;</o:p></SPAN></FONT></P> <P class=MsoNormal><FONT color=navy size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">Firstname LASTNAME<BR></SPAN></FONT><FONT color=navy size=2 face=Arial><SPAN style="FONT-FAMILY: Arial; COLOR: navy; FONT-SIZE: 10pt">COMPANY Name<o:p></o:p></SPAN></FONT></P></DIV></BODY></HTML> EDIT 2 - STATIONERY I don't use stationery format: EDIT 3 - HTML If I delete the signature (Ctrl+A, Del) in the HTML mode the images always appear. If I use the signature in text only mode, the images disappears...

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• How do I make rsync also check ctime?

  - by Benoît

  rsync detects files modification by comparing size and mtime. However, if for any reason, the mtime is unchanged, rsync won't detect the change, although it's possible to spot it by looking at the ctime. Of course, I can tell rsync do compare the whole files' contents, but that's very very expensive. Is there a way to make rsync smarter, for example by checking mtime+size are the same AND that ctime isn't newer than mtime (on both source and destination) ? Or should I open a feature request ? Here's an example: Create 2 files, same content and atime/mtime benoit@debian:~$ mkdir d1 && cd d1 benoit@debian:~/d1$ echo Hello > a benoit@debian:~/d1$ cp -a a b Rsync them to another (non-exisiting) directory: benoit@debian:~/d1$ cd .. benoit@debian:~$ rsync -av d1/ d2 sending incremental file list created directory d2 ./ a b sent 164 bytes received 53 bytes 434.00 bytes/sec total size is 12 speedup is 0.06 OK, everything is synced benoit@debian:~$ grep . d*/* d1/a:Hello d1/b:Hello d2/a:Hello d2/b:Hello Update file 'b', same size and then reset its atime/mtime benoit@debian:~$ echo World > d1/b benoit@debian:~$ touch -r d1/a d1/b Attempt to rsync again: benoit@debian:~$ rsync -av d1/ d2 sending incremental file list sent 63 bytes received 12 bytes 150.00 bytes/sec total size is 12 speedup is 0.16 Nope, rsync missed the change. benoit@debian:~$ grep . d*/* d1/a:Hello d1/b:World d2/a:Hello d2/b:Hello Tell rsync the compare the file content benoit@debian:~$ rsync -acv d1/ d2 sending incremental file list b sent 144 bytes received 31 bytes 350.00 bytes/sec total size is 12 speedup is 0.07 Gives the correct result: benoit@debian:~$ grep . d*/* d1/a:Hello d1/b:World d2/a:Hello d2/b:World

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• Fresh Install of SQL Server 2008 doesn't install managment studio. Help!

  - by Jordan S

  Ok I am running Windows 7, 64 bit. I cleaned of SQL server 2005 completely off my system leaving only SQL Compact Edition. I went here http://www.microsoft.com/downloads/details.aspx?FamilyID=01af61e6-2f63-4291-bcad-fd500f6027ff&displaylang=en and installed SQL Server 2008 Express Edition Service Pack 1. After the install, under my start bar menu all i have for SQL configuration tools are the Configuration Manager, Error and Usage Reporting and the Install Center. I don't have the SQL Managment Studio. So I went here http://www.microsoft.com/downloads/details.aspx?FamilyID=08e52ac2-1d62-45f6-9a4a-4b76a8564a2b&displaylang=en and downloaded the SQL Server 2008 Management Studio Express but when I try to install it I get a warning says This program has known compatibility issues and that I need to Install SQL Server 2008 Service Pack 1. I thought that is what I installed. So, I tried to continue running the install but I then get an error message that says Invoke or BeginInvoke can not be called on a Form before it is opened... How can I check if Service pack 1 is installed or not? What should I do?

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• Cron won't use msmtp to send emails in case of failed cronjob

  - by Glister

  I'm trying to configure a machine so that it will send me an email if one of the cronjobs output something in case of an error. I'm using Debian Wheezy. Cron is working normally (without the email functionality). msmtp is installed and configured. Have already symlinked /usr/{bin|sbin}/sendmail to /usr/bin/msmtp. I can send email by using: echo "test" | mail -s "subject" [email protected] or by executing: echo "test" | /usr/sbin/sendmail Without the symlink (/usr/sbin/sendmail) cron will tell me that: (CRON) info (No MTA installed, discarding output) With the symlinks I get: (root) MAIL (mailed 1 byte of output; but got status 0x004e, #012) Can you suggest how to config the cron/msmtp pair? Thanks! EDIT: Note: I've written "msmtpd" by mistake. Its not a daemon but rather an SMTP client named just "msmtp" (without the "d" ending). It is executed on demand and it is not running in the background all the time. When I try to send an email by using msmtp like that it works: echo "test" | msmtp [email protected] On the far side, in the logs of the SMTP server I read: Nov 2 09:26:10 S01 postfix/smtpd[12728]: connect from unknown[CLIENT_IP] Nov 2 09:26:12 S01 postfix/smtpd[12728]: 532301C318: client=unknown[CLIENT_IP], sasl_method=CRAM-MD5, [email protected] Nov 2 09:26:12 S01 postfix/cleanup[12733]: 532301C318: message-id=<> Nov 2 09:26:12 S01 postfix/qmgr[2404]: 532301C318: from=<[email protected]>, size=191, nrcpt=1 (queue active) Nov 2 09:26:12 S01 postfix/local[12734]: 532301C318: to=<[email protected]>, orig_to=<[email protected]>, relay=local, delay=0.62, delays=0.59/0.01/0/0.03, dsn=2.0.0, status=sent (delivered to command: IFS=' ' && exec /usr/bin/procmail -f- || exit 75 #1001) Nov 2 09:26:12 S01 postfix/qmgr[2404]: 532301C318: removed Nov 2 09:26:13 S01 postfix/smtpd[12728]: disconnect from unknown[CLIENT_IP] And the Email is delivered to the target user. So it looks like that the msmtp client is working properly. It has to be something in the cron/msmtp integration, but I have no clue what that thing might be. Can you help me?

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• Upstart: cannot run as root

  - by Ronni Egeriis

  I have made this upstart script, which starts a Node.js service. But all of the sudden the service has stopped, and upstart has failed to restart it. Now that I am trying to start it manually, it fails to recognize my service: start: Unknown job: queue The script is properly placed in /etc/init, and should have the correct rights: -rw-r--r-- 1 root root 200 Aug 7 13:30 queue.conf When I check the config file with init-checkconf however, it says that it is not able to run as root: root@production1:~# init-checkconf /etc/init/queue.conf ERROR: cannot run as root What causes this error and how do I solve it? Debug info: Ubuntu 12.04.3 LTS root@production1:~# service --version service ver. 0.91-ubuntu1 Edit Here's queue.conf: description "Echo.it command queue" author "Ronni Egeriis Persson <[email protected]>" stop on shutdown respawn respawn 20 5 exec sudo -u beanstalk /usr/bin/node /var/www/queue/index.js >> /var/log/queue.log 2>&1 The command sudo -u beanstalk /usr/bin/node /var/www/queue/index.js >> /var/log/queue.log 2>&1 works fine when run manually.

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• How to tell which process is hogging my CPU when they don't add up to 100%?

  - by endolith

  Ubuntu's System Monitor applet shows 100% CPU usage continuously. If I click it, the resources tab shows it at 100% continuously, too. If I go to processes, though, to find out which process is the culprit, there is nothing above 10%. If I run top there is nothing above 10%. The individual processes do not add up to 100%. I try killing lots of processes, but the overall usage continues to be 100%. How can I find out what's hogging the CPU? This is an unusual situation on a computer I use daily, which is never anywhere near 100% CPU unless I'm doing something that requires it (like loading 32 Firefox tabs), after which it goes back to a normal idle level. It's not a new install or anything. There is no reason the processor should be maxed out. I'm not sure when it started or if I changed something that caused it to happen. Normally I would use top or System Monitor and find the process that had gone out of control, but I can't find anything with those tools this time. It persists after reboots and everything. And the processor is obviously hot, so it's not an erroneous reading. Update: I tried killing every process, one at a time, until the problem went away, and killing vino-server finally fixed it, even though that process never went above 5%. I had enabled Remote Desktop a few days ago (and have obviously now disabled it). But the question remains: How did a single process manage to use 100% CPU while top only showed that process at 5%? How do I identify culprits like this in the future? Looks like I'm not the only one who's had this problem: Still a problem in both jaunty & karmic. Interestingly, both System Monitor & htop do not show the sum of individual processes being anywhere near 100% cpu.

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• Diagnosing a BSOD involving USB

  - by David Ebbo

  [Running Win7 Ultimate 64 bit] My new HP Pavilion Elite HPE-450t has been plagued by BSDO crashes since I got it about 5 weeks ago. The crashes are somewhat rare, sometimes not occurring for 3 or 4 days. I have spent a lot of time trying to isolate the device that could be at fault, but I have seen crashes with only the keyboard and mouse plugged in (as USB devices), and I tried two sets of keyboard/mouse, so I'm running out of ideas. :( The WhoCrashed tool gave this info about my latest BSOD: crash dump file: C:\Windows\Minidump\121310-11887-01.dmp This was probably caused by the following module: usbport.sys (USBPORT+0x2DE4E) Bugcheck code: 0xFE (0x5, 0xFFFFFA8008F571A0, 0x80863B34, 0xFFFFFA80092F2510) Error: BUGCODE_USB_DRIVER file path: C:\Windows\system32\drivers\usbport.sys product: Microsoft® Windows® Operating System company: Microsoft Corporation description: USB 1.1 & 2.0 Port Driver Bug check description: This indicates that an error has occurred in a Universal Serial Bus (USB) driver. The crash took place in a standard Microsoft module. Your system configuration may be incorrect. Possibly this problem is caused by another driver on your system which cannot be identified at this time. I looked at http://msdn.microsoft.com/en-us/library/ff560407(VS.85).aspx, and for Parameter1 = 0x5, it says "A hardware failure has occurred due to a bad physical address found in a hardware data structure. This is not due to a driver bug". Should I conclude that it's a hardware issue in the machine itself, rather than a bad USB driver or USB device? Here is the MiniDump, in case someone can get more info out of it: http://ewt52q.blu.livefilestore.com/y1peS4Ce8nSK1SXghzMDoxDWXlaEu-EKCJsv25y8y5DXXIUzZ9U0_tYgFJXd939fykwa0zRmx98IW0PYG18GioqKAuARYjtspSA/121310-11887-01.dmp?download&psid=2

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• Is there any way to retire a AT&T Yahoo Email Account

  - by KindaSortaAsking

  Here are the facts as I (pretty sure) know them. Yahoo handles AT&T's DSL email accounts. I've called AT&T tech support and customer service and they say they can't help, but there has GOT to be a way to do this. It's too simple of a thing not to be able to do. I got behind on my dsl bill and my account got suspended. When I paid my bill, they said my account had been deactivated and I had to get a new account. When I tried to register my account with my old email address it would not let me, saying it was in use. I used a new email. The old email address is tied to a dsl account that can NEVER be reactivated. There has got to be a way to retire the old email address so that I can re-create it as a subaccount on my new dsl account. I'm not interested in anything that was in the old account (emails, addresses, etc) - I just want the address back.

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• Polite busy-waiting with WRPAUSE on SPARC

  - by Dave

  Unbounded busy-waiting is an poor idea for user-space code, so we typically use spin-then-block strategies when, say, waiting for a lock to be released or some other event. If we're going to spin, even briefly, then we'd prefer to do so in a manner that minimizes performance degradation for other sibling logical processors ("strands") that share compute resources. We want to spin politely and refrain from impeding the progress and performance of other threads — ostensibly doing useful work and making progress — that run on the same core. On a SPARC T4, for instance, 8 strands will share a core, and that core has its own L1 cache and 2 pipelines. On x86 we have the PAUSE instruction, which, naively, can be thought of as a hardware "yield" operator which temporarily surrenders compute resources to threads on sibling strands. Of course this helps avoid intra-core performance interference. On the SPARC T2 our preferred busy-waiting idiom was "RD %CCR,%G0" which is a high-latency no-nop. The T4 provides a dedicated and extremely useful WRPAUSE instruction. The processor architecture manuals are the authoritative source, but briefly, WRPAUSE writes a cycle count into the the PAUSE register, which is ASR27. Barring interrupts, the processor then delays for the requested period. There's no need for the operating system to save the PAUSE register over context switches as it always resets to 0 on traps. Digressing briefly, if you use unbounded spinning then ultimately the kernel will preempt and deschedule your thread if there are other ready threads than are starving. But by using a spin-then-block strategy we can allow other ready threads to run without resorting to involuntary time-slicing, which operates on a long-ish time scale. Generally, that makes your application more responsive. In addition, by blocking voluntarily we give the operating system far more latitude regarding power management. Finally, I should note that while we have OS-level facilities like sched_yield() at our disposal, yielding almost never does what you'd want or naively expect. Returning to WRPAUSE, it's natural to ask how well it works. To help answer that question I wrote a very simple C/pthreads benchmark that launches 8 concurrent threads and binds those threads to processors 0..7. The processors are numbered geographically on the T4, so those threads will all be running on just one core. Unlike the SPARC T2, where logical CPUs 0,1,2 and 3 were assigned to the first pipeline, and CPUs 4,5,6 and 7 were assigned to the 2nd, there's no fixed mapping between CPUs and pipelines in the T4. And in some circumstances when the other 7 logical processors are idling quietly, it's possible for the remaining logical processor to leverage both pipelines. Some number T of the threads will iterate in a tight loop advancing a simple Marsaglia xor-shift pseudo-random number generator. T is a command-line argument. The main thread loops, reporting the aggregate number of PRNG steps performed collectively by those T threads in the last 10 second measurement interval. The other threads (there are 8-T of these) run in a loop busy-waiting concurrently with the T threads. We vary T between 1 and 8 threads, and report on various busy-waiting idioms. The values in the table are the aggregate number of PRNG steps completed by the set of T threads. The unit is millions of iterations per 10 seconds. For the "PRNG step" busy-waiting mode, the busy-waiting threads execute exactly the same code as the T worker threads. We can easily compute the average rate of progress for individual worker threads by dividing the aggregate score by the number of worker threads T. I should note that the PRNG steps are extremely cycle-heavy and access almost no memory, so arguably this microbenchmark is not as representative of "normal" code as it could be. And for the purposes of comparison I included a row in the table that reflects a waiting policy where the waiting threads call poll(NULL,0,1000) and block in the kernel. Obviously this isn't busy-waiting, but the data is interesting for reference. _table { border:2px black dotted; margin: auto; width: auto; } _tr { border: 2px red dashed; } _td { border: 1px green solid; } _table { border:2px black dotted; margin: auto; width: auto; } _tr { border: 2px red dashed; } td { background-color : #E0E0E0 ; text-align : right ; } th { text-align : left ; } td { background-color : #E0E0E0 ; text-align : right ; } th { text-align : left ; } Aggregate progress T = #worker threads Wait Mechanism for 8-T threadsT=1T=2T=3T=4T=5T=6T=7T=8 Park thread in poll() 32653347334833483348334833483348 no-op 415 831 124316482060249729303349 RD %ccr,%g0 "pause" 14262429269228623013316232553349 PRNG step 412 829 124616702092251029303348 WRPause(8000) 32443361333133483349334833483348 WRPause(4000) 32153308331533223347334833473348 WRPause(1000) 30853199322432513310334833483348 WRPause(500) 29173070315032223270330933483348 WRPause(250) 26942864294930773205338833483348 WRPause(100) 21552469262227902911321433303348

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• Poor SSL performance with vsftpd

  - by petrus

  I'm trying to tweak vsftpd to achieve maximum performance for my usage: I have only one or two clients that connect to the server. File size is between ~15MB and 1GB. Typical transfer batch represent between 1 and 2GB of data. For testing purposes, I'm using a tmpfs on both sides (thus eliminating any disks bottleneck) with a single 1GB file. When SSL is disabled, performance is good, with a transfer rate at ~120MB/s (reaching the limits of gigabit networking). With SSL enabled only for control traffic (and not data traffic), performance drops at about 112MB/s, which is still within the acceptable limits. However, when SSL is enabled for data flows, the transfer speed drops dramatically: 6.7MB/s using 3DES & SHA (ssl_ciphers=DES-CBC3-SHA in vsftpd.conf) 16MB/s using DES & SHA (ssl_ciphers=DES-CBC-SHA) I didn't tested other ciphers, but from what I can see from the CPU usage during the transfer, it seems that vsftpd is only using a single cpu/core per client. While this can fit for large ftp sites with hundreds of clients, I'd like to avoid this behavior and use more ressources on the server. On a side note, if you have any ideas regarding other openssl ciphers...

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• BTrFS crashhhh?

  - by bumbling fool

  I create a new BTrFS raid10 file system using two 250GB drives and the second partition on a third 80GB drive. I create a subvol and snapshot. I mount the snapshot and start copying 8GB of data to it. It gets to around 1GB and the Desktop disappears and what looks like a non interactive terminal comes up with dump/crash information. I don't have a camera handy or I'd take a picture and post it. It basically looks like stack trace info. CTRL-ALT F7 will eventually bring back the Desktop though but the entire BTrFS portion of the OS is hung and non responsive until I reboot. I've reformated and reproduced this problem 3 times now and I'm about to give up :( I realize it is possible this problem is not entirely BTrFS' fault because I'm on natty which is still alpha. More granular details in case I'm an idiot: 1) Create FS: sudo mkfs.btrfs -m raid10 -d raid10 /dev/sda2 /dev/sdb /dev/sdc 2) Initial temporary mount: mkdir /btrfs && sudo mount -t btrfs /dev/sda2 /btrfs 3) Create subvol btrfs s c /btrfs/vm 4) Create initial snapshot: (optional) btrfs s sn /btrfs/cantremember.snap.something 5)unmount /btrfs and mount /btrfs/vm sudo mount -t btrfs -o subvol=vm /dev/sda2 /btrfs/vm 6) Copy data to subvolume. 7) Balance data across drives: (optional) btrfs f bal <path> (never get to this step 7...) Am I doing something wrong?

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• Need help with custom init script

  - by churnd

  I'm trying to set up an init script for a process on redhat linux: #!/bin/sh # # Startup script for Conquest # # chkconfig: 345 85 15 - start or stop process definition within the boot process # description: Conquest DICOM Server # processname: conquest # pidfile: /var/run/conquest.pid # Source function library. This creates the operating environment for the process to be started . /etc/rc.d/init.d/functions CONQ_DIR=/usr/local/conquest case "$1" in start) echo -n "Starting Conquest DICOM server: " cd $CONQ_DIR && daemon --user mruser ./dgate -v - Starts only one process of a given name. echo touch /var/lock/subsys/conquest ;; stop) echo -n "Shutting down Conquest DICOM server: " killproc conquest echo rm -f /var/lock/subsys/conquest rm -f /var/run/conquest.pid - Only if process generates this file ;; status) status conquest ;; restart) $0 stop $0 start ;; reload) echo -n "Reloading process-name: " killproc conquest -HUP echo ;; *) echo "Usage: $0 {start|stop|restart|reload|status}" exit 1 esac exit 0 However, the cd $CONQ_DIR is getting ignored, because the script errors out: # ./conquest start Starting Conquest DICOM server: -bash: ./dgate: No such file or directory [FAILED] For some reason, I have to run dgate as ./dgate. I cannot specify the full path /usr/local/conquest/dgate The software came with an init script for a Debian system, so the script uses start-stop-daemon, with the option --chdir to where dgate is, but I haven't found a way to do this with the Redhat daemon function.

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• /dev/input/uinput Device appears to be 'broken'

  - by Adam Luchjenbroers

  I'm trying to setup Pystromo so that I can remap the keys on my Belkin N52TE gamepad. Pystromo basically captures the key strokes and then outputs the remapped keystrokes to the uinput device. However, at the moment it simply swallows the input and outputs absolutely nothing. I've tracked the issue to something being wrong with my uinput device, with the smoking gun being: # ls -l /dev/input/uinput crw-rw---- 1 root plugdev 10, 223 Dec 31 2009 /dev/input/uinput # cat /dev/input/uinput cat: /dev/input/uinput: No such device The uinput module is loaded, and can be clearly seen via lsmod. Anyone seen this before, or can think of something worth attempting? Current Setup Gentoo Linux Kernel 2.6.32 (Gentoo Sources 2.6.32-r1) HP DV7 Laptop Output dmesg dmesg | grep uinput does nothing, and no new lines appear if I run modprobe -r uinput && modprobe uinput. Yet the uinput module can clearly be seen when running lsmod: # lsmod | grep uinput uinput 6200 0 lsusb # lsusb Bus 005 Device 003: ID 050d:0200 Belkin Components Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 008 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 002: ID 1532:0101 Razer USA, Ltd Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 002: ID 5986:0143 Acer, Inc Bus 002 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub Bus 006 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 007 Device 002: ID 03f0:171d Hewlett-Packard Wireless (Bluetooth + WLAN) Interface [Integrated Module] Bus 007 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub lsusb -v PasteBin Update Hmm, updating evdev and hal seems to have partially fixed it. /dev/input/uinput still can't be accessed but Pystromo is now remapping keys successfully. I'm a little bit mystified about what's going on here, but it seems that my understanding of how all this works is flawed. Since I've posted a bounty, I'll leave this here for someone to post an explanation for how user-space input devices work under the hood.

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