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• How to detect an iPhone connecting a network?

  - by JayCrossler

  I've noticed through watching Wireshark that when an iPhone connects to a wifi network, it sends out a few IGMP/MDNS packets to 224.0.0.251 (LAN broadcast, I think). Is there any easy way to watch for these packets and then either run a script or send an event? Or, is the best way to just run a packet sniffer? Any simple ones that can send events or execute curl commands when a filter is triggered? When I run nc -u -l 5353 I get: My-Name-iPhonelocal??? x???)?? ??cc^C Can I do something like: nc -u -l 5353 | grep iPhonelocal | execute command...

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• Need help automating a task in Linux

  - by Niphoet

  I'm still kind of new to Linux, but here's what I'm trying to do. I need to copy all subdirectories and files from one directory to another ever 5 minutes or so, with the old data automatically being overwritten with the new data. I'd also like this to run at startup. Is there any way this can be done? If so, what program would I need to schedule the automation and what is the command line I would need (cp ???). Thanks in advance!

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• Windows DIR listing switch to exclude files in hidden folders

  - by Jason

  I'm trying to get a list of files from a directory excluding files in hidden folders. With the following command, hidden folders are traversed even though I've set /A:-H to exclude hidden directories. Is there a different switch to stop them from being traversed too? dir "C:\SVN" /A:-H /w /b /s Alternatively, for this use case I know the name of the hidden folders I want to exclude, so if there is a way to exclude the folders by name ("\.svn\") that might have to suffice. Thanks!

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• how to check if something is in the queue of torque?

  - by kloop

  I want to re-run some jobs that completed prematurely under torque. These jobs are run through .job scripts (using qsub). However, I don't want to re-run a job which is already in the queue. Given a script filename, how can I know whether it is already in torque's queue (using qstat?) or not? I prefer to do it programmatically, of course, so any oneliner that searches for a given script name would be great. I will note that I can grep submit_args in qstat -f, but I can't get it to display the whole script name when it is too long. This is crucial. EDIT: I managed to solve it using the following command: qstat -x | perl -pi -e 's/\<\//\n/g' | grep job$ | grep -v submit_args | perl -pi -e 's/Job_Id\>\<Job_Name\>//' works because all my scripts end in the string "job".

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• Enter response once prompt returns?

  - by mjb

  It's neither a secure idea nor one I'd recommend elsewhere, but I have a situation when occasionally it takes a while for my Ansible ad-hoc command to respond. I'd love to pipe or args or whatever is needed to push the required text into the prompt so I can walk away and know it will finish. Ex: $ ansible all -m shell -a "reboot" --ask-pass Password: blah blah blah it worked I'd love to send an argument or << or something to get the password in. Is that possible?

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• Create a term-document matrix from files

  - by Joe

  I have a set of files from example001.txt to example100.txt. Each file contains a list of keywords from a superset (the superset is available if we want it). So example001.txt might contain apple banana ... otherfruit I'd like to be able to process these files and produce something akin to a matrix so there is the list of examples* on the top row, the fruit down the side, and a '1' in a column if the fruit is in the file. An example might be... x example1 example2 example3 Apple 1 1 0 Babana 0 1 0 Coconut 0 1 1 Any idea how I might build some sort of command-line magic to put this together? I'm on OSX and happy with perl or python...

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• Batch file to open multiple cmd prompts

  - by JHarris

  I am trying to write a batch file that will automate the following manual process: Open a new cmd prompt (prompt1) Run a bat file (b1) Run a program (that will continue to run) Minimize prompt1 Open a new cmd prompt (prompt2) Run a bat file (b1) Run a different program (that will continue to run) Minimize prompt2 I've found ways to open multiple instances of cmd to run different things, but after I've run the first thing (b1), I then need to run a program in that same cmd window. I currently have start /min cmd /k C:\Users\db2admin\python_environment\Scripts\activate.bat start /min cmd /k C:\Users\db2admin\python_environment\Scripts\activate.bat This opens the two windows and runs the bat, great, but now I need to execute another command (running a python file) in each of the cmd windows. How do I send commands to each prompt?

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• Increase Volume of an MKV Video from Linux Terminal

  - by The How-To Geek

  I've got a large amount of .MKV video files which seem to all play at a very low volume - I end up having to turn the TV up all the way to hear them, which is really irritating when I switch to another channel and wake the dead because it's so loud. What I'm looking for is a command-line method to increase the volume (so I can run it on all of them quickly) that would hopefully work regardless of the audio codec in use in the particular file. (I don't mind hard-coding the output audio though). For reference, I'm using Ubuntu 9.04 on my server, and the files are being played back with Boxee on a Mac Mini, but the volume problem is the same on Windows too.

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• Text after Control Sequence

  - by SPAM SPAM SPAM SPAM

  I am trying to parse the output of a command that expects to be writing to the screen. It has data separated by move-to-origin control sequences (for the VT220, ESC[1;1H). I only need the last part (i.e. after the last move-to-origin). I have tried doing this multiple ways (primarily awk and sed), but the problem is always that parts of the control sequence have special meaning (to the program, not just to the shell), and I cannot quote them when I substitute tput's output. Any suggestions?

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• How to connect to VPN using commands in Linux (Fedora 16)

  - by WarFox

  Usually, I use the network connections icon on the top bar to connect to VPN. The connection is configured properly and it connects well. Configuration screen shot is given below. As you can see I have selected the 'Connect automatically' option. But this option doesn't help in connecting to VPN automatically upon login. This is my university VPN and it uses 'Point-to-Point encryption (MPPE)' for authentication I need to connect to the VPN using command line, so that I can write a script and run it at start up, so the connection is automatically established every time I login. This will also help in connecting to VPN when I login from 'init 3' mode. I depend on this VPN connection for my internet access. Please help me with the required commands.

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• Different color prompts for different machines when using terminal/ssh?

  - by bcrawl

  Hi, I have 5 machines I constantly ssh into to do work. Its getting increasingly frustrating when I am issuing wrong commands on wrong boxes. Luckily I havent done anything bad yet. I wanted to know if there is any hack which I can hardcode which will display my prompt in different colors based on the machine I am ssh into? Such as blue for desktop1, purple for laptop, red for server etc? Is this possible? Currently I am using this command export PS1="\e[0;31m[\u@\h \W]\$ \e[m " taken from here http://www.cyberciti.biz/faq/bash-shell-change-the-color-of-my-shell-prompt-under-linux-or-unix/ but it obviously doesnt work across ssh. Also, if you have any other cool bash tips for helping me ease my sight will be wonderful. I got this tip which colors the man pages. http://linuxtidbits.wordpress.com/2009/03/23/less-colors-for-man-pages/

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• Increase Volume of an MKV Video from Linux Terminal

  - by The How-To Geek

  I've got a large amount of .MKV video files which seem to all play at a very low volume - I end up having to turn the TV up all the way to hear them, which is really irritating when I switch to another channel and wake the dead because it's so loud. What I'm looking for is a command-line method to increase the volume (so I can run it on all of them quickly) that would hopefully work regardless of the audio codec in use in the particular file. (I don't mind hard-coding the output audio though). For reference, I'm using Ubuntu 9.04 on my server, and the files are being played back with Boxee on a Mac Mini, but the volume problem is the same on Windows too.

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• Smart Auto-completion in SVN (and other programs!)

  - by Jimmy

  When I type "svn add path/to/somefile..." and tab to autocomplete, the system should ONLY complete files/directories that are NOT under currently under SVN control. Likewise, when I commit, remove or resolve files, the tab completion should only complete files that are relevant to what I'm doing. This is especially important in SVN where I can waste thousands of keystrokes typing long path and file names, but it of applies to other programs. I know bash has a bash_completion file that can be used to programatically alter this behaviour but I've not found a decent example of SVN completion which actually completes file names rather than SVN command names. My question is: Does anyone have such a setup? Does anyone use a different shell or tool that does something similar? Has anyone given this any thought?

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• Vim equivalent to Emacs C-i?

  - by Culip

  Does Vim have a command equivalent to Emacs' Ctrl-I? Emacs has an extremely useful shortcut "C-I" which fixes indentation of the current line (or selected lines.) For example, suppose you write this tiny code on Emacs: def foo print "boo" end and you are selecting the whole 3 lines. You press "C-I" then the code becomes def foo print "boo" end I can use this in quiet mode i.e. ignoring. Emacs as well. Does anyone know how to do this on Vim?

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• How to create batch file that delete all the folders named `bin` or `obj` recursively?

  - by Nam Gi VU

  I have the need of deleting all bin & obj folders in a folder on my PC. So, I'm thinking of a batch file to do that but I'm not famaliar with batching file in Windows. Please help. [Edit] After discussion with user DMA57361, I got to the current solution (still having problem though, see our comments): Create a .bat file, and paste the below command: start for /d /r . %%d in (bin,obj) do @if exist "%%d" rd /s/q "%%d" OR start for /d /r . %%d in (bin,obj) do @if exist "%%d" rd /s "%%d" @DMA57361: When I run your script, I get the below error. Any idea?

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• Color in Cygwin terminal

  - by ForbesLindesay

  I've installed cygwin because I'm a bit fed up with the Windows terminal not being great. The only problem I'm having is the lack of colours. You can see the problem in the following 2 screenshots that display the same command: All I want is something which has a nice font, resizes properly (including proper behaviour when maximised) and support for colours. Ideally I'd like tabs too. This seems like a silly reason to end up buying a mac, so I'm hoping I can get all these things on windows somehow.

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• Command-line tool to search for file names on offline backup drives

  - by halloleo

  I am looking for an open-source (command-line) tool to register and search all my (backup) drives on a file name level. I want to search for file and folder names preferably written as regular expressions or file glob patterns. The external drives contain just normal HFS and NTFS filesystems. The backups are done via direct file copy. Requirement is that the tool compiles on OS X and works without each of the drives attached, but rather pointing me to the drive in case a drive contains a file with the pattern I searched for. At the moment I use a hand-knit script solution with locate databases, one for each external backup drive, but this is rather cumbersome, because locate itself can accesses only one database at a time and does not contain any management system for all the indices/databases. Are there any other tools out there for this?

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• Connect a linux server to network and access it from another computer browser

  - by user1732451

  I had a server in a hosting company and I took it home. I need to connect him to a local network (not wifi) and access to the server from another computer in the network via browser, like I did it when it was in the hosting company. I don't have any knowledge in linux, I just know how to type in the command line :) I thinks all the IP configuration of the server is one big mess, because it passed from more then one hosting company to another... I tried a lot of tutorials that I found in the web, but nothing works - mainly because I don't know how to check if I did something wrong. I just need to know how to connect to local network ( D-Link router) and then access the server from another computer browser. thanks update: the server os is: CentOS release 4.8 (Final)

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• PHP exec() on windows not working

  - by Rich Harrington

  Hey, I'm trying to execute a program on windows through PHP, the command is posted below. This doesn't seem to be running through the script at all, even though it works when the command is manually entered into the command prompt. exec('C:\\ffmpeg -i ' . $movedfile . ' -acodec aac -ab 128k -vcodec libx264 -fpre C:\\ffmpeg\\share\\ffmpeg\\libx264-hq.ffpreset -crf 22 -threads 0 -wpredp 0' . $convertedfile); Any suggestions? Thanks! EDIT: There are two slashes for path seperators, stack overflow only displays one though

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• piping findstr's output

  - by Gauthier

  Windows command line, I want to search a file for all rows starting with: # NNN "<file>.inc" where NNN is a number and <file> any string. I want to use findstr, because I cannot require that the users of the script install ack. Here is the expression I came up with: >findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9_]*.inc" all_pre.txt The file to search is all_pre.txt. So far so good. Now I want to pipe that to another command, say for example more. >findstr /r /c:"^# [0-9][0-9]* \"[a-zA-Z0-9]*.inc" all_pre.txt | more The result of this is the same output as the previous command, but with the file name as prefix for every row (all_pre.txt). Then comes: FINDSTR: cannot open | FINDSTR: cannot open more Why doesn't the pipe work? snip of the content of all_pre.txt # 1 "main.ss" # 7 "main.ss" # 11 "main.ss" # 52 "main.ss" # 1 "Build_flags.inc" # 7 "Build_flags.inc" # 11 "Build_flags.inc" # 20 "Build_flags.inc"

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• How to disable Center Key (CK) and let only Left Soft Key (LSK) be used in j2me

  - by awaghad-ashish

  Hello everyone, I created a custom item in which I need to use the Center Key for the purpose of selecting and I am successfully able to use it with the keyPressed event using the keyCode as -5. The problem is, as soon as I press the CK, it also clicks on the command above the LSK and that causes the menu to pop up. Is there any way that I can disable the CK for a particular command or something like that (because I dont need CK, since I can click on the command through LSK as well, I want to use the CK specifically for the custom item)? Any kind of help will be appreciated, Thanks and regards, Ashish.

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• Batch file running on Vista problem

  - by maqsood

  Dear All , I have to generate keys from cWrsync, I have Command: "ssh-keygen -t rsa -q -N '' -f %ALLUSERSPROFILE%\.ssh\id_rsa" I placed that command into a batch file, that is pointing to cwRsync\bin directory, where ssh-keygen exe file is located, That batch file working fine Windows, But in Vista it is throwing unexpected result... the output of batch on Vista is: C:\Program Files\cwRsync\bin>ssh-keygen -t rsa -q -N '' -f C:\ProgramData\.ssh\i d_rsa open C:\\ProgramData\\.ssh\\id_rsa failed: Bad address. Saving the key failed: C:\ProgramData\.ssh\id_rsa. The intersting thing is that if i manually run this command in commandline , it again run successfully,

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• Mac OS X bash prompt bug?

  - by Memo

  I am trying to set my bash prompt to display the time and current directory in bold: export PS1="\[\e[1m\][\A] \w \$ \[\e[0m\]" This does apparently work, but when I use the command history (ctrl-r), after finding the command I was searching for and pressing enter, this line is not displayed correctly. Here is an example: [21:58] ~/Wyona/svn-repos/zwischengas $ (reverse-i-search)`ta': tail -F logs/log4j-cnode1.log becomes, after pressing enter: [21:58] ~/Wyona/svn-repos/zwischengas $ -F logs/log4j-cnode1.log Of course, this is not "really" a problem, since the command does work correctly, but it is still annoying. Does anybody know why this happens? And, more importantly, how to prevent/fix it? Thanks, Memo

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• Program to call other programs

  - by Evil

  hello. I am writing a program that will solve a type of min. spanning tree problem. i have 2 different algorithms that I've gotten working in two separate .cpp files i've named kruskels.cpp and prims.cpp. my question is this: each file takes the following command line to run it . time ./FILENAME INPUTFILE FACTOR i would like to make a program that, depending on what inputfile is entered, will run either kruskels.cpp or prims.cpp. how can i do this? this program must pass those command line arguments to kruskels or prims. each file (kruskels.cpp and prims.cpp) are designed to be run using those command line arugments (so they take in INPUTFILE and FACTOR as variables to do file io). this should be for c++.

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• How to load program reading stdin and taking parameters in gdb?

  - by vinc456

  I have a program that takes input from stdin and also takes some parameters from command line. It looks like this: cat input.txt myprogram -path "/home/user/work" I try to debug the code with gdb inside emacs, by M-x gdb, I try to load the program with the command: gdb cat input.txt myprogram -path "/home/user/work" However, gdb does not like it. Question cribbed from here. Unfortunately I don't understand the solution and am not sure what to do beyond compiling with the -g option and running the command M-x gdb.

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