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• Why are default spamassassin rules not being applied to emails we generate?

  - by Chance

  My company uses a standalone spam-assassin install to test marketing emails, however, mail originating from us does not seem to run the full gamut of test. For example, Spam assassin has a default rule that flags messages that contain the phrase Dear [Something], and it properly flags spam that I feed it.It does not, however, apply that same rule to in house email I send it. Is it possible that spam assassin has white-listed us somehow, perhaps because the mail originates in the same domain as the server or receiver? I believe most of the recent spamassassin questions have been mine, so thanks for bearing with me as I figure this out! Chance EDIT Details on our SA setup: We are piping the emails into the CL with spamc -R < test_email.eml Identical results testing as root or a user, no user_prefs file

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• FM Transmitter for the Home

  - by greggannicott

  After asking this question regarding piping music through my home I'm looking to buy an FM transmitter. I'd like to connect it to my home pc (ie. into the speaker port), and I'd then control the output with my iPhone (ie. using Apple's Remote software). The problem is, given that almost every FM transmitter is advertised to be used in the car (ie. an iTrip) it's proving very tricky knowing which one would be ideal for the home. First, has anyone tried this? Did it work ok or was there simply to much interference for it work. Secondly, if it did work ok, can anyone recommend a reasonable transmitter? For what I need it seems like an ideal solution, so given that I'm struggling to find information regarding it I'm starting to believe it's not as ideal as it first seems. Thanks in advanance.

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• Is there an encrypted write-only file system for Linux?

  - by Grumbel

  I am searching for an encrypted filesystem for Linux that can be mounted in a write-only mode, by that I mean you should be able to mount it without supplying a password, yet still be able to write/append files, but neither should you be able to read the files you have written nor read the files already on the filesystem. Access to the files should only be given when the filesystem is mounted via the password. The purpose of this is to write log files or similar data that is only written, but never modified, without having the files themselves be exposed. File permissions don't help here as I want the data to be inaccessible even when the system is fully compromised. Does such a thing exist on Linux? Or if not, what would be the best alternative to create encrypted log files? My current workaround consists of simply piping the data through gpg --encrypt, which works, but is very cumbersome, as you can't easily get access to the filesystem as a whole, you have to pipe each file through gpg --decrypt manually.

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• Feeding the kernels entropy source from other machines and/or increasing its maximum size

  - by David Spillett

  We have has a little trouble with a small box that acts as a VPN end-point and mail relay for our network, caused by the available entropy for /dev/random being too low (which causes TLS connection attempts by exim to fail). The machine doesn't do anything else, so the normal feed into the entropy pool (interrupt timings from things like disk access) is not enough. As a quick hack I've set a looping script that reads from /dev/hda at a couple of Mbyte/sec which keeps it topped up. Other than buying a hardware RNG, is there a clean way of piping data for entry from elsewhere, such as a copy of the data our file server uses for its entropy source? I've spotted several tips for using rng-tools to feed it from /dev/urandom on the same machine but that "feels dirty". Also, is it possible to increase the maximum pool size? It currently seems to max out at 3585.

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• Find keyword values from PDF [closed]

  - by JukkaA

  I have a lot of PDF reports I'd need to index. They're mostly "text-based PDFs", not images. I know they all have account number in certain format, 123456AAAAA and some other keyword info like addresses, customer names etc. needed in indexing these files. Basically if the file is ab.pdf, I need to create ab.txt that contains: ACC=123456AAAA Customer=John Doe Date=20120808 What would be the best software/solution to generate indexing information for these? I know there's pdftotext, but piping it to different grep/awk commands is a hack... It would be nice to specify an area in PDF to search for the account number, and specify the format it is in.

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• Linux - Multiple service statuses with one command

  - by Jimbo

  I'm trying to retrieve a list of multiple service statuses in Unix. I'm using the service command: man page. The statuses all start with the transmission-daemon string, for example. I require the ability to list multiple services' statuses, with a single command. Here is what I'm currently trying (and failing) with: Here I'm trying to grab a list of statuses using grep. service $(ls /etc/init.d | grep "transmission-daemon") status Here I'm trying to list all statuses, and then grep for them. service --status-all | grep "transmission-daemon" This produces the following, which isn't much help: How can I effectively achieve what I require with a single command, so that I can then continue piping to awk for further customisation? Desired example output: transmission-daemon started transmission-daemon2 stopped transmission-daemon3 started

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• btrfs won't run from cron

  - by Mikkel

  I'm trying to set up a cron job to create a btrfs subvolume snapshot of my root partition. The command works perfectly if I run it from the command line, but nothing happens at the scheduled cron time. I've tried piping to logger and redirecting stdout/stderr to file, and not only is there no content, the file I'm logging to isn't even created. The cron command I have is as follows: 0 0 * * * /sbin/btrfs subvolume snapshot / "/snapshots/$(date +%Y-%m-%d)" I've tried prefixing it with /bin/bash, but that makes no difference. What am I missing?

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• Is there an encrypted write-only file system for Linux?

  - by Grumbel

  I am searching for an encrypted file system for Linux that can be mounted in a write-only mode, by that I mean you should be able to write/append files, but not be able to read the files you have written. Access to the files should only be given when the filesystem is mounted via a password. The purpose of this is to write log files and such, without having the log files themselves be accessible. Does such a thing exist on Linux? Or if not, what would be the best alternative to create encrypted log files? My current workaround consists of simply piping the data through gpg --encrypt, which works, but is very cumbersome, as you can't get easy access to the file system as a whole, you have to pipe each file through gpg --decrypt manually.

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• I would like to pipe output of find into input list of scp, how?

  - by user13184

  I'm a novice linux user and I am trying to send a long list of files from one computer to another. The argument list is too long, so I am using find. I am having trouble setting up the expression, though. Can someone help? Here is what I would normally type for a short argument list. scp ./* phogan@computer/directory... Here's I think this might translate into with find. scp find . -name "*" phogan@computer/directory... Maybe I could use piping? Any suggestions would help. Thanks in advance.

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• Why is execution of batch files different between drag & drop and from command line?

  - by Dharma Leonardi

  Ok, so I've been trying to figure this out for hours with no progress. I have created a batch file to get details of a VHD. Everything runs fine and produces the expected results when run from the command line in a command prompt. However, when I use drag and drop from file explorer (dragging a vhd file and dropping onto the batch file) the batch file runs without errors but the output (VHD.INFO) is empty. I'm stumped. Edited to only include the behaviour: @echo off cls setlocal enabledelayedexpansion set "_PATH.THIS=%~dp0" echo HELP | diskpart > %_PATH.THIS%OUTPUT.TMP TYPE %_PATH.THIS%OUTPUT.TMP PAUSE To demonstrate the different behaviour, please run the batch file from the command line once (works) and also run the batch file by double clicking in file explorer (failure in all piping commands).

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• No-Weld Multi-Monitor Stand Crafted From Sturdy Metal Framing

  - by Jason Fitzpatrick

  As far as DIY stands for multiple monitors go, this design has to be the sturdiest and least difficult to construct model we’ve seen in some time. Read on to see how one DIYer cleverly crafted a solid metal triple monitor stand with no welding involved. Tinker and gamer Opteced wanted a new stand for his Eyefinity setup but wasn’t in a hurry to spend a pile of cash on a custom stand. His DIY solution is just as sturdy as a commercial metal stand but is made out of inexpensive hardware store parts–the main supports and base are made from Unistrut, a simple metal framing material. Unlike many DIY stands made from metal rods and piping, this build doesn’t require any sort of welding or custom pipe threading. In fact, the metal struts are so over engineered for the task of holding up flat-panel monitors he was able to simply partially saw through them and bend them to the shape he wanted. Hit up the link below for additional pictures of the build. Unistrut Monitor Stand [via Hack A Day] 8 Deadly Commands You Should Never Run on Linux 14 Special Google Searches That Show Instant Answers How To Create a Customized Windows 7 Installation Disc With Integrated Updates

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• New Walkthrough Capability in AutoVue 20

  - by warren.baird

  New in AutoVue 20 is the capability to view a 3D model of a building from the inside - this is a very powerful tool for anyone who needs to work with models of plants, refineries, or other buildings. All of the standard AutoVue functionality is available, so you can click on any part of the building to get attribute data, manipulate the view, do measurement, etc. For example, in the image below we've made the Architectural model (Walls, Floors, etc.) transparent, but left the electrical and mechanical models opaque, so it's easy to see where the wires and piping run behind the walls. Additionally you can bring together different files and different types of files, using our digital mockup capability - in the image below the heating and air conditioning sytem on the left came from one file, and the electrical box on the right came from another wile, and the model of the room came from yet a third file, but with everything brought together into AutoVue you can do things like use our measurement capability to ensure there's enough space to get maintenance equipment down the hallway, before the building is even built. For more information about Walkthrough, you can view a video demo at http://download.oracle.com/autovue/3D_walkthrough_movie.wmv We're very excited about this new capability - do you think this will be useful for you in your work with AutoVue? Let us know!

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• Warping Images using cvWarpPerspective Results in Some Parts of the images out of the viewable area

  - by Birkan Cilingir

  Hi, I am trying to stich two images together. In order to do so I extracted sift features and find matches on the two images using this C implementation. http://web.engr.oregonstate.edu/~hess/index.html After that I found the homography matrix using the matched points. http://www.ics.forth.gr/~lourakis/homest/ But if I use this Homography Matrix in "cvWarpPerspective" function, some of the parts of the image goes out of the viewable area (negative corrdinates). To solve this I tried to calculate the bounding box first by piping the four corners of the image through Homography matrix. And move the initial image then warp it. But this caused the warping result to change. Is there any way for warping an image and keeping it in the viewable area? I would appreciate any help. Thanks in advance...

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• Associate mount points with local disks in VBscript / WMI

  - by Mark Unwin

  I have a VBscript that outputs various config items about a system. Both hardware and software. I can output disks and their associated partitions. I can output mount points. I do not seem to be able to associate a mount point with a local disk (where it actually is a local disk). I need to be able to do this using VBscript, so as to fit in with the rest of the ~2000 lines of code. I do NOT want to run some other program graphically. I know the disk manager service can show me (My Computer - Manage - Disk Management), but this is not what I need. I need to be able to do this remotely via VBscript. I am open to running an .exe from the VBscript and piping the output back into VBscript and massaging it from there. Any idea's ? Thanks in advance.

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• Python's Popen cleanup

  - by pythonic metaphor

  I wanted to use a python equivalent to piping some shell commands in perl. Something like the python version of open(PIPE, "command |"). I go to the subprocess module and try this: p = subprocess.Popen("zgrep thingiwant largefile", shell=True, stdout=subprocess.PIPE) This works for reading the output the same way I would in perl, but it doesn't clean itself up. When I exit the interpreter, I get grep: writing output: Broken pipe spewed all over stderr a few million times. I guess I had naively hoped all this would be taken care of for me, but that's not true. Calling terminate or kill on p doesn't seem to help. Look at the process table, I see that this kills the /bin/sh process, but leaves the child gzip in place to complain about the broken pipe. What's the right way to do this?

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• libssh2 port forward

  - by Evan D

  In extension of this question http://stackoverflow.com/questions/1580750/example-code-of-libssh2-being-used-for-port-forwarding I was wondering if there's an "easier" way to connect to the locally binded addr:port. From the link: you bind a remote port and list it locally, you accept incoming data from the port and send it to another socket (namely the local addr:port), after which I'd like to connect to the local addr:port. Is there a way to skip the "send it to another" step and direct the data directly for my "connect to localhost" ? There are two parts to why I want this, first, it seems excessive, and in the spirit of piping, I wouldn't be surprised if it was possible. Second, since I'm trying to connect to a localhost'ed bound port forward, all code is in the same thread, making a continiously getting data-sending data, and polling the sending data from another socket, a bit tricky. Thanks in advance, Evan

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• Bash: how to interrupt this script when there's a CTRL-C?

  - by WizardOfOdds

  I wrote a tiny Bash script to find all the Mercurial changesets (starting from the tip) that contains the string passed in argument: #!/bin/bash CNT=$(hg tip | awk '{ print $2 }' | head -c 3) while [ $CNT -gt 0 ] do echo rev $CNT hg log -v -r$CNT | grep $1 let CNT=CNT-1 done If I interrupt it by hitting ctrl-c, more often than not the command currently executed is "hg log" and it's that command that gets interrupted, but then my script continues. I was then thinking of checking the return status of "hg log", but because I'm piping it into grep I'm not too sure as to how to go about it... How should I go about exiting this script when it is interrupted? (btw I don't know if that script is good at all for what I want to do but it does the job and anyway I'm interested in the "interrupted" issue)

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• Erlang Supervisor Strategy For Restarting Connections to Downed Hosts

  - by derdewey

  I'm using erlang as a bridge between services and I was wondering what advice people had for handling downed connections? I'm taking input from local files and piping them out to AMQP and it's conceivable that the AMQP broker could go down. For that case I would want to keep retrying to connect to the AMQP server but I don't want to peg the CPU with those connections attempts. My inclination is to put a sleep into the reboot of the AMQP code. Wouldn't that 'hack' essentially circumvent the purpose of failing quickly and letting erlang handle it? More generally, should the erlang supervisor behavior be used for handling downed connections?

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• Colour output piped to less

  - by mmacaulay

  Operating system: Mac OS 10.6.2 I'd like to be able to see colour output when piping certain commands through less. Two examples: I've got ls aliased to ls --color=auto, so I'd like to be able to see colour when I do this: ls -l | less I've also got the color extension turned on in Mercurial, so I'd like to see colour output from: hg diff | less and hg st | less After some googling, it seems like some versions of less support either -r or -R to make this work, but no dice for me. I can't see anything in the man page that looks like what I need. (-r or -R SEEM to be the right options, but again, they don't seem to work)

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• How do I pipe the Java console output to a file?

  - by Ced

  I found a bug in an application that completely freezes the JVM. The produced stacktrace would provide valuable information for the developers and I would like to retrieve it from the Java console. When the JVM crashes, the console is frozen and I cannot copy the contained text anymore. Is there way to pipe the Java console directly to a file or some other means of accessing the console output of a Java application? Update: I forgot to mention, without changing the code. I am a manual tester. Update 2: This is under Windows XP and it's actually a web start application. Piping the output of javaws jnlp-url does not work (empty file).

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• PowerShell: Read text, regex sort, write output to file and formatting

  - by Bill Hunter

  I am a Powershell novice and have run into a challenge in reading, sorting, and outputting a csv file. The input csv has no headers, the data is as follows: 05/25/2010,18:48:33,Stop,a1usak,10.128.212.212 05/25/2010,18:48:36,Start,q2uhal,10.136.198.231 05/25/2010,18:48:09,Stop,s0upxb,10.136.198.231 I use the following piping construct to read the file, sort and output to a file: (Get-Content d:\vpnData\u62gvpn2.csv) | %{,[regex]::Split($, ",")} | sort @{Expression={$[3]}},@{Expression={$_[1]}} | out-file d:\vpnData\u62gvpn3.csv The new file is written with the following format: 05/25/2010 07:41:57 Stop a0uaar 10.128.196.160 05/25/2010 12:24:24 Start a0uaar 10.136.199.51 05/25/2010 20:00:56 Stop a0uaar 10.136.199.51 What I would like to see in the output file is a similar format to the original input file with comma dilimiters: 05/25/2010,07:41:57,Stop,a0uaar,10.128.196.160 05/25/2010,12:24:24,Start,a0uaar,10.136.199.51 05/25/2010,20:00:56,Stop,a0uaar,10.136.199.51 But I can't quite seem to get there. I'm almost of the mind that I'll have to write another segment to read the newly produced file and reset its contents to the preferred format for further processing. Thoughts?

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• Compare output of program to correct program using bash script, without using text files

  - by Doug

  I've been trying to compare the output of a program to known correct output by using a bash script without piping the output of the program to a file and then using diff on the output file and a correct output file. I've tried setting the variables to the output and correct output and I believe it's been successful but I can't get the string comparison to work correctly. I may be wrong about the variable setting so it could be that. What I've been writing: TEST=`./convert testdata.txt < somesampledata.txt` CORRECT="some correct output" if [ "$TEST"!="$CORRECT" ]; then echo "failed" fi

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• How do I send a file as an email attachment using Linux command line?

  - by Kit Roed

  I've created a script that runs every night on my Linux server that uses mysqldump to back up each of my MySQL databases to .sql files and packages them together as a compressed .tar file. The next step I want to accomplish is to send that tar file through email to a remote email server for safekeeping. I've been able to send the raw script in the body an email by piping the backup text file to mailx like so: $ cat mysqldbbackup.sql | mailx [email protected] cat echoes the backup file's text which is piped into the mailx program with the recipient's email address passed as an argument. While this accomplishes what I need, I think it could be one step better, Is there any way, using shell scripts or otherwise, to send the compressed .tar file to an outgoing email message as an attachment? This would beat having to deal with very long email messages which contain header data and often have word-wrapping issues etc.

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• AWK: is there some flag to ignore comments?

  - by HH

  Comment rows are counted in the NR. Is there some flag to ignore comments? How can you limit the range in AWK, not like piping | sed -e '1d', to ignore comment rows? Example $ awk '{sum+=$3} END {avg=sum/NR} END {print avg}' coriolis_data 0.885491 // WRONG divided by 11, should be by 10 $ cat coriolis_data #d-err-t-err-d2-err .105 0.005 0.9766 0.0001 0.595 0.005 .095 0.005 0.9963 0.0001 0.595 0.005 .115 0.005 0.9687 0.0001 0.595 0.005 .105 0.005 0.9693 0.0001 0.595 0.005 .095 0.005 0.9798 0.0001 0.595 0.005 .105 0.005 0.9798 0.0001 0.595 0.005 .095 0.005 0.9711 0.0001 0.595 0.005 .110 0.005 0.9640 0.0001 0.595 0.005 .105 0.005 0.9704 0.0001 0.595 0.005 .090 0.005 0.9644 0.0001 0.595 0.005

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• what does < < mean in the shell

  - by stib

  when looping recursively through folders with files containing spaces the shell script I use is of this form, copied from the internet: while IFS= read -r -d $'\0' file; do dosomethingwith "$file" # do something with each file done < <(find /bar -name *foo* -print0) I think I understand he IFS bit, but I don't understand what the < < characters mean. Obviously there's some sort of piping going on here.. It's very hard to google "< <", you see. TIA -stib

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