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• Clear all currently defined vim macros

  - by Simon Walker

  Hi everyone I have a vim macro that I keep mistyping, usually when I'm trying to save something so I do it quickly and I can't work out what keys I pressed. It is annoying as it pastes some irrelevant bash code into my file so I have to undo the erroneous pasting which also undos the last thing I typed that I do want. I was looking for a way to either list the currently defined macros (so I can redefine the offending one), or a way to clear out them completely. I only use macros in the very short term so I don't mind losing them all. Cheers

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• Problems with system() calls in Linux

  - by Thomas

  I'm working on a init for an initramfs in C++ for Linux. This script is used to unlock the DM-Crypt w/ LUKS encrypted drive, and set the LVM drives to be available. Since I don't want to have to reimplement the functionality of cryptsetup and gpg I am using system calls to call the executables. Using a system call to call gpg works fine if I have the system fully brought up already (I already have a bash script based initramfs that works fine in bringing it up, and I use grub to edit the command line to bring it up using the old initramfs). However, in the initramfs it never even acts like it gets called. Even commands like system("echo BLAH"); fail. So, does anyone have any input?

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• Parse file to hash in Ruby

  - by Taschetto

  I'm a ruby newcomer who's trying to read a text file (a Valgrind simulation output) like this: -------------------------------------------------------------------------------- Profile data file 'temp/gt_1024_2_16.out' -------------------------------------------------------------------------------- I1 cache: 1024 B, 16 B, 2-way associative D1 cache: 32768 B, 64 B, 8-way associative LL cache: 3145728 B, 64 B, 12-way associative Profiled target: bash run.sh Events recorded: Ir I1mr ILmr Dr D1mr DLmr Dw D1mw DLmw Events shown: Ir I1mr ILmr Dr D1mr DLmr Dw D1mw DLmw Event sort order: Ir I1mr ILmr Dr D1mr DLmr Dw D1mw DLmw Thresholds: 99 0 0 0 0 0 0 0 0 Include dirs: User annotated: Auto-annotation: off -------------------------------------------------------------------------------- Ir I1mr ILmr Dr D1mr DLmr Dw D1mw DLmw -------------------------------------------------------------------------------- 1,894,017 246,981 2,448 519,124 4,691 2,792 337,817 1,846 1,672 PROGRAM TOTALS // other data I want to extract the PROGRAM TOTALS table and put it into a hash. Something like... myHash = { :Ir => 1894017, :I1mr => 246981, ILmr => 2448, ..., DLmw => 1672 } What are the best options for doing this? Could the CSV classes help me out? Thanks a bunch.

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• Replacing whitespace with sed in a CSV (to use w/ postgres copy command)

  - by Wells

  I iterate through a collection of CSV files in bash, running: iconv --from-code=ISO-8859-1 --to-code=UTF-8 ${FILE} | \ sed -e 's/\"//g' | \ sed -e 's/, /,/g' \ > ${FILE}.utf8 Running iconv to fix UTF-8 characters, then the first sed call removes the double quote characters, and the final sed call is supposed to remove leading and trailing whitespace around the commas. HOWEVER, I still have a line like this in the saved file: FALSE,,,, 2.40,, The COPY command in postgres is kind of dumb, so it thinks " 2.40" is not valid syntax for a numeric value. Where am I going wrong w/ my processing of the CSV file? Thanks!

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• OS X Terminal: Meta key + alt functionality at the same time

  - by abababa22

  Is there a way to use "alt/option" key as a meta key but still be able to use the key to make some characters which need it? For example in my local keyboard layout: @ is alt-2 \ is alt-shift-7 | is alt-7 etc. So if I set alt as meta key, I can't make those characters. On the other hand using "press esc, release esc, press a key" to make meta key sequences makes my hands hurt. Any emacs users with international keyboards who have solved this, please give any tips you might have! :) edit: It appears that I can set alt as meta key and then add these kind of settings in inputrc: "\e2": "@" This works in bash shell but it still won't work with emacs though, so no good.

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• RegExp to match everything up to first blank line

  - by SKWebDev

  Hi, I'm writing a bash script that will show me what TV programs to watch today, it will get this information from a text file. The text is in the following format: Monday: Family Guy (2nd May) Tuesday: House The Big Bang Theory (3rd May) Wednesday: The Bill NCIS NCIS LA (27th April) Thursday: South Park Friday: FlashForward Saturday: Sunday: HIGNFY Underbelly I'm planning to use 'date +%A' to work out the day of the week and use the output in a grep regex to return the appropriate lines from my text file. If someone can help me with the regex I should be using I would be eternally great full.

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• [C#] Creating standalone, console (shell) for domain-specific operations

  - by mr.b

  Say that I have a system service, and I want to offer a low-level maintenance access to it. For that purpose, I'd like to create a standalone, console application that somehow connects to server process and lets user type in commands, allow it to use auto-completion and auto-suggestion on single/double TAB press (just like linux bash shell, mysql cli, cmd.exe, and countless others), allow command line editing capabilities (history, cursor keys to move around text..), etc. Now, it's not that much of a problem to create something like that by rolling my own from scratch, handling user input, scanning pressed keys, and doing correct actions. But, why reinvent the wheel? Is there some library/framework that helps with this kind of problems, just like readline library that offers improved command-line editing capabilities under linux? Of course, this new "shell" would respond only to valid, domain-specific commands, and would suggest valid arguments, options, switches... Any ideas? Thanks!

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• Winodws server 2003 Setup

  - by Barracksbuilder

  I work at a university maintaining the computer science department server. I am looking for a more economical way to stream line the set up of student accounts. CS students are granted a Username and password an IIS virtual directory, FTP virtual directory, and a mysql database. Server is running windows server 2003R2 (Possibly migrating to 2008R2) The server is running a domain though no students physically log a terminal into it (No computers are part of my domain.) Creating the account is a manual process. I did right a PHP script to query the Universities AD and copy the information and write it to my AD. I then have to create basically the users home directory. I tried having AD do it but since the user never physically logs in it never creates the directory. Permissions on this folder are set to User - full, Instructors (group) - full, Users (group) - read, IUSER - read. Inside of the users folder their is a "Private" folder with permissions User - full, instructors (group) - full. Next step is IIS I create a virtual directory in the default web site pointed to the users home directory so they have a website. Same goes for FTP virtual directory in the default ftp configuration to allow the users to upload files to their website. Mysql I have to create a user and password then create a mysql scheme (database) full access for the user and full access to the instructors account to be able to access the students database. All of this is done manually and takes me a week to do. The closest description is maybe a shared hosting environment. Is there a better way to do this? Scripting wise, or better structure setup?

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• Localizing a JSF 1.2 application with UTF-8 resources

  - by Filini

  (WARNING: this is my first java application, coming from .NET, so don't bash me if I write too much garbage) I'm developing a simple JSF 1.2 web application which should support Russian, Chinese, and other languages outside ISO 8859-1, which is automatically used in Properties.load(). Is there a way to use the Properties loaded from XML files, with Properties.loadFromXml(), inside JSF, without writing too much code? I know there are alternative ways to do so (writing my own loader, escaping the characters...), but I'd really love to find a simple solution, and I don't see it in all the forums I checked. Thanks in advance for any help

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• Missing the Rails 2.3.4 gem. Even though it's installed!

  - by Shereef

  Running Snow Leopard. Tried uninstalling, and re-installing. Still getting the same error whenever I run a rake task. mbpro:redmine shereef$ ruby -v ruby 1.8.7 (2009-06-12 patchlevel 174) [i686-darwin10.0.0] mbpro:redmine shereef$ rails -v Rails 2.3.4 mbpro:redmine shereef$ which rails /usr/local/bin/rails mbpro:redmine shereef$ gem -v 1.3.5 mbpro:redmine shereef$ which gem /usr/local/bin/gem mbpro:redmine shereef$ rake -v (in /Users/shereef/Documents/Code/BetterMeans/redmine) Missing the Rails 2.3.4 gem. Please gem install -v=2.3.4 rails, update your RAILS_GEM_VERSION setting in config/environment.rb for the Rails version you do have installed, or comment out RAILS_GEM_VERSION to use the latest version installed. mbpro:redmine shereef$ which rake /usr/bin/rake mbpro:redmine shereef$ $PATH -bash: /usr/local/bin:/usr/local/sbin:/usr/local/mysql/bin:/opt/local/bin:/opt/local/sbin:/opt/local/bin:/opt/local/sbin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/local/bin:/usr/local/git/bin:/usr/X11/bin: No such file or directory mbpro:redmine shereef$

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• VMware ESX Linux Guest Customization

  - by andyh_ky

  Hello, I am interested in deploying several RHEL 4 Update 8 virtual machines for creation of a test environment. Here are the steps I am taking: In off hours, P2V/V2V the production machines and convert them to templates Deploy the virtual machines with a customization specification that changes hostname, IP address I am interested in how these processes are done and if there are any options for further customization. Are the machines brought on the network when they are powered on, before they are reconfigured? Is there a potential IP address conflict? Is there an option to run additional scripts which reside on the guest as a part of the reconfiguration? For example, restoring an Oracle Database. This is an option with Windows guests and sysprep, but I have been unable to locate anything showing a RHEL equivalent. I am dealing with a multi tier application. The main issue I am attempting to mitigate is that the application servers reference database servers by hostname and in tnsnames files. I am interested in scripting the reconfiguration of the application in the deployment so that the app/db servers are pointing to the test environment. I am OK with placing the 'cleanup' script on the source and executing it after the machine has been brought up. I am interested in the automation of the script's execution post clone/boot, as well as if there could be an IP address conflict. (cross posted to VMTN's ESX 4 community)

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• Scaling a ruby script by launching multiple processes instead of using threads.

  - by Zombies

  I want to increase the throughput of a script which does net I/O (a scraper). Instead of making it multithreaded in ruby (I use the default 1.9.1 interpreter), I want to launch multiple processes. So, is there a system for doing this to where I can track when one finishes to re-launch it again so that I have X number running at any time. ALso some will run with different command args. I was thinking of writing a bash script but it sounds like a potentially bad idea if there already exists a method for doing something like this on linux.

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• Automatically reconnect to VPN when it drops

  - by IAmAI

  I use OpenVPN to connect to a VPN service. I will often use it unattended and on occasion I have come back to find the service disconnected and GUI asking for login credentials. If the connection is disconnected by the service, and not me, I'd like it to attempt to reconnect automatically with no intervention from me, and ideally, if the reconnection attempt initially fails, keep attempting to do so at regular intervals until a connection is successfully. Is there anyway to configure OpenVPN to do this? If not, can someone suggest a way of doing it with scripting (I use Windows)? Failing that, can anyone suggest a VPN solution that does this? The VPN provider supports PPTP as well as OpenVPN. I have configured OpenVPN to read login credentials from a file. Below is my config script. I have censored any details specific to the VPN provider. client dev tun proto tcp remote ???.???.??? 0000 resolv-retry infinite nobind persist-key persist-tun ca ???.???.??? verb 3 mute-replay-warnings float reneg-sec 0 auth-user-pass auth.conf auth-nocache Thanks for your help.

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• Monitoring Between EC2 Regions

  - by ABrown

  I'm working on a small EC2 project that involves a handful of servers in two different regions (US East and EU West). My first task is to implement a Nagios monitoring solution. Monitoring within a region is simple - I just use the private domain names/IPs, but I'm a little unsure of the best way to handle monitoring the second region without setting up a second Nagios install. The environment is fairly static, so I'm not going to be scripting the configuration with the EC2 tools just yet. As I see it, I have two options. Two Nagios installations (which is over-kill for the small number of servers I'm dealing with). Pros: I don't have to alter the group permissions nor do I have to pay for the traffic, redundancy in the monitoring solution - I could monitor the Nagios servers. Cons: two installations to deal with and I'd need to run another server instance. Have the single installation monitor both regions. Pros: one installation to deal with. Cons: slightly reduced security - security group will have to have NRPE (5666) opened for one source IP and also paying for a small amount of bandwidth at the Internet rate for data transfer between the regions. I guess my question is - how have others handled this problem and what are your recommendations? Thanks!

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• Multiple Apps Possible via Launch Services, want to Specify Particular One

  - by Andrew

  Here's the issue: I have a list of App names that I want to launch. They do not include a path (e.g. {"VLC","Microsoft Word"}. I have two different copies of VLC in different directories. I would like Launch Services to ONLY open the one from /Applications/ and not EVER launch from /Applications/AnotherDirectory I want to get the path of these, and test to see what Launch Services wants to launch (via bash with "open" or applescript via "tell _ to launch" or [NSWorkspace launch...]) The only way that I have come up with to test the path of a file about to be launched by launch services is: Applescript: tell application "Finder" to return the (posix path of (path to application "VLC" as alias)) That works fine, but launches the app (which I don't want at all). Suggestions?

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• Looking for python lib to manage remote tasks

  - by Riz

  Hi, I have server with django on it, this server runs some manage.py commands and update database. Now I need to move some of this tasks to different servers. I don't want to allow remote db access and need some tool\lib to be able to start task on remote servers by main server's command and update tasks code/add new tasks. I have ssh access to every server, all servers run under debian and all code in python. I was thiking about creating my own xmpp based solution(server sends messages to slave servers with commands to execute, like "update task", "run task"), or maybe some low-level ssh based solution where main server logs to slave servers and executes bash commands. But I would be happy to hear any advices.

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• PHP exec problem with s3-put

  - by schneck

  Hi there, I use the s3-bash-project to upload data to an S3-Bucket. My command looks like this: /mypath/s3_bash/s3-put -v -k '123456789' -s '/mypath/secret' -T '/mypath/upload/myuploadfile' '/my.bucket/mykeyname' I can run the command from the command line (Mac OS X), and it works well. Now I want to execute it from a PHP-Script: exec($command, $output); but in output, the "s3-put"-command only returns the command's help text. I log the command, and it works if I c&p it from the log the the command line, so there not a problem. It seems that PHP does not pass all the parameters to the command line, although I run escapeshellarg() over all the parameters. I'm using a local XAMPP-Test environment, safe_mode is off. Any ideas?

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• Methods and practices for managing a network that has no internet connection

  - by FaultyJuggler

  Originally asked in Super User but realized this belongs here. Long story short, I am setting up a network with 32 servers of varying specs that will be used for testing and development. We will be using RedHat Linux, we also do not have a router as of yet and were looking into making one of the servers act as our router/DHCP etc. The small cluster will be on an isolated network with no internet. I can use external harddrives and discs to transfer anything from external sources into machines on the network, so this isn't a locked down secure network, it just won't have a direct connection to the outside world. I've worked on such setups before, but always long after they were setup. So I'm reaching out to see what everyone knows as far as how groups have handled initial setup and maintenance of such a situation. What is the best way to get them all configured and up to date? What are the best ways to automate updates, network wide installs, etc. With the only given that I have large multi-terabyte external hard drives that would be used to drop whatever files are needed onto a central server, how do i then distribute those files and install their contents? I've done perl scripting, some teammates have played with puppet, so we aren't completely in the dark, I just wanted to avoid reinventing the wheel since this is a common challenge.

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• Getting one line in a huge file with PHP

  - by JavaRocky

  How can i get a particular line in a 3 gig text file. The lines are delimited by \n. And i need to be able to get any line on demand. How can this be done? Only one line need be returned. And i would not like to use any system calls. Note: There is the same question elsewhere regarding how to do this in bash. I would like to compare it with the PHP equiv.

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• How to restore files that were removed by git?

  - by Ryan

  I am a git noob and git just deleted a bunch of important files. How do I get them back? I have a repo on my local machine. To get into git, I just right click my project folder and select "git bash here". This brings up the master where I do all my giting. So I had some changes to stage and I did: git add . This staged a bunch of changes. I noticed that I didn't want some of these staged so I decided that I'd try to unstage everthing. I did this: git reset --hard HEAD^ This basically deleted a bunch of files that I had made on the last commit and jumped to the commit before. How do I get those files back? If I can't do it through git is there another way?

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• Why don't hardware failures show up at the programming language level?

  - by Julian Cienfuegos

  I am wondering if anyone can give my a good answer, or at least point me in the direction of a good reference to the following question: How come I have never heard of a computer breaking in a very fundamental way? How come when I declare x to be a double it stays as a double? How come there is never a short circuit that robs it of some bytes and makes it an integer? Why do we have faith that when we initialize x to 10, there will never be a power surge that will cause it to become 11, or something similar? I think I need a better understanding of memory. Thanks, and please don't bash me over the head for such a simple/abstract question.

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• XCode Project Code Changes Not Updating 100% After Save-Build-Run

  - by Greg

  When I make code changes to my iPhone game project in XCode, and then do CMD-B + Enter, I expect the project to be saved, build and run on the simulator with the latest. What is happening though, sometimes, is that it doesn't pick up a small change I make unless I clean the project and then build. I'm a long time Java person and newish to C-based languages and it's compiler. Can someone explain to me what is cached after each build that does this and how to change my project settings to avoid having to clean everytime? Or tell me the bad news that this is part of C development? Not trying to bash it - I get compiled JSPs stuck in the working cache often in Java, too. :P

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• How do I open a terminal window with C++ in Ubuntu?

  - by Epic Jakelor

  I recently decided to start teaching myself C++ and thought a simple encryption project would be a good place to start, since it covers most of the basics (cout, cin, opening files, etc). Is there a way to have the code open a terminal window similar to the one opened when I compile and run from sublime text? I have tried this so far, but it hasn't changed anything. string cmd = "gnome-terminal-x sh-c 'ls-l; exec bash'"; system(cmd.c_str()); Essentially, I would like to be able to run the program by clicking the .exe, and have the terminal where all of the input and output goes pop up.

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• Getting rails to execute root level file edits on system files without compromising security.

  - by voxobscuro

  I'm writing a Rails 3 application that needs to be able to trigger modifications to unix system config files. I'd like to insulate the file modifications from the consumer side by running them in a background process. I've considered writing out a temp file in rails and then copying the file with a bash script but that doesn't really insulate the system. I've also considered pulling from the database manually with a cron based script and updating the configs. But what I would really like is a component that can hook into the rails environment, read out what is needed from the database, and update the config files. This process needs to be run as root because the config files mostly live in /etc/whatever. Any suggestions? Thanks!

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• How to search for a file or directory in Linux Ubuntu machine

  - by Jury A

  I created an EC2 instance (Ubuntu 64 bit) and attached a volume from a publicly available snapshot to the instance. I successfully mounted the volume. I am supposed to be able to run a script from this attached volume using the following steps as explained in the tutorial: Log in to your virtual machine. mkdir /space mount /dev/sdf1 /space cd /space ./setup-script The problem is that, when I try: ./setup-script I got the following message: -bash: ./setup-script: No such file or directory What is the problem ? How can I search for the ./setup-script in the whole machine ? I'm not very familiar with linux system. Please, help. For more details about the issue: Look at my previous post: Error when mounting drive

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