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• How can one-handed work in Emacs be eased?

  - by N.N.

  My right hand is temporarily immobilized and I would like to do some minor work in Emacs, mostly in Org-mode, but also in AUCTeX. Are there ways to ease one-handed work in Emacs, such as some mode or particular work flow? For instance I noticed that for undoing it is easier to press C-x u than C-_ and that it is easier to mark text with methods involving C-Space than with combinations of S- and movement commands. I have found http://stackoverflow.com/questions/2391805/how-can-i-remain-productive-with-one-hand-completely-immobilized but that is not exactly what I am asking for. I want to ease whatever little time spent one-handed in Emacs (not in general) and this is also interesting for situations where there is no injury involved, such as when one hand is occupied. I do realize that I should avoid unnecessary strain. I am using GNU Emacs 23.3.1 in Ubuntu 11.04.

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• Howto update Preview.app from the command line without loosing focus on OSX ?

  - by snies

  Hello, i want to update Preview.app in the background from the command line without loosing focus of my current window. I know that i can use the following to open/update the view of a file, but than i loose focus to the Preview.app. open -a Preview foo.pdf I guess there might be some clever Apple Script commands to do so but so far i didn't find the right one. Alternatively i would be interested into transfering the focus back to my current app directly after the update. I need this in order to update Preview.app's view of a pdf through a vi autocmd after i update the pdf according to changes in a tex file i am editing. Here is an example of what i want to achive but using Ubuntu and evince.

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• Appropriate programming design questions.

  - by Edward

  I have a few questions on good programming design. I'm going to first describe the project I'm building so you are better equipped to help me out. I am coding a Remote Assistance Tool similar to TeamViewer, Microsoft Remote Desktop, CrossLoop. It will incorporate concepts like UDP networking (using Lidgren networking library), NAT traversal (since many computers are invisible behind routers nowadays), Mirror Drivers (using DFMirage's Mirror Driver (http://www.demoforge.com/dfmirage.htm) for realtime screen grabbing on the remote computer). That being said, this program has a concept of being a client-server architecture, but I made only one program with both the functionality of client and server. That way, when the user runs my program, they can switch between giving assistance and receiving assistance without having to download a separate client or server module. I have a Windows Form that allows the user to choose between giving assistance and receiving assistance. I have another Windows Form for a file explorer module. I have another Windows Form for a chat module. I have another Windows Form form for a registry editor module. I have another Windows Form for the live control module. So I've got a Form for each module, which raises the first question: 1. Should I process module-specific commands inside the code of the respective Windows Form? Meaning, let's say I get a command with some data that enumerates the remote user's files for a specific directory. Obviously, I would have to update this on the File Explorer Windows Form and add the entries to the ListView. Should I be processing this code inside the Windows Form though? Or should I be handling this in another class (although I have to eventually pass the data to the Form to draw, of course). Or is it like a hybrid in which I process most of the data in another class and pass the final result to the Form to draw? So I've got like 5-6 forms, one for each module. The user starts up my program, enters the remote machine's ID (not IP, ID, because we are registering with an intermediary server to enable NAT traversal), their password, and connects. Now let's suppose the connection is successful. Then the user is presented with a form with all the different modules. So he can open up a File Explorer, or he can mess with the Registry Editor, or he can choose to Chat with his buddy. So now the program is sort of idle, just waiting for the user to do something. If the user opens up Live Control, then the program will be spending most of it's time receiving packets from the remote machine and drawing them to the form to provide a 'live' view. 2. Second design question. A spin off question #1. How would I pass module-specific commands to their respective Windows Forms? What I mean is, I have a class like "NetworkHandler.cs" that checks for messages from the remote machine. NetworkHandler.cs is a static class globally accessible. So let's say I get a command that enumerates the remote user's files for a specific directory. How would I "give" that command to the File Explorer Form. I was thinking of making an OnCommandReceivedEvent inside NetworkHandler, and having each form register to that event. When the NetworkHandler received a command, it would raise the event, all forms would check it to see if it was relevant, and the appropriate form would take action. Is this an appropriate/the best solution available? 3. The networking library I'm using, Lidgren, provides two options for checking networking messages. One can either poll ReadMessage() to return null or a message, or one can use an AutoResetEvent OnMessageReceived (I'm guessing this is like an event). Which one is more appropriate?

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• Run a command from Windows 7 Start Menu

  - by Abhijeet Patel

  I'm trying to run commands such as "cmd.exe", "appwiz.cpl" etc by typing it in the Search box of the Start Menu in Windows 7 (x86). I'm able to do this just fine in Vista. After typing in "cmd" I notice that I see a link to "Programs" in the start menu so it seems that "cmd" is being recognized but when I click on "Programs" link which is shown,I get the following message. "These files can't be opened. Your internet security settings prevented one or more files from being opened" P.S. - I'm not looking for enabling the "Run" command to show in the Start Menu Any help would be much appreciated

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• Is there a way to obtain a Dell server's RAID configuration/level using only winrm/wsman? (ESXi servers)

  - by EGr

  I've seen videos describing how to configure RAID using wsman/winrm commands run against a server's iDRAC, but I can't seem to find anything that will just give me the current configuration and RAID levels. Is this possible? What uri would I use? If it matters, this is being run against M610s. Edit: If there is an easier way to obtain this information by running a script against the iDRAC, I'm not opposed to switching my methods. EDIT: The server is running ESXi, so if there is a way to obtain this through the vSphere client or PowerCLI, I can do that too. Overall, I just need a way to obtain the RAID configuration for multiple servers without having to query against the actual server (eg: via the iDRAC).

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• Mercurial says hgrc is untrusted in Emacs, but works fine from the command line

  - by Ken

  I've got some Mercurial checkouts in a directory that was mounted by root. Mercurial is usually suspicious of files that aren't mine, but I'm the only user here, so I put: [trusted] users = root groups = root in my ~/.hgrc, and now I can use hg from the command line with no warnings or errors about anything being untrusted. So far, great. But when I try to run, say, vc-annotate in Emacs, I get an Annotate buffer that says: abort: unknown revision 'Not trusting file /home/me/.../working-copy/.hg/hgrc from untrusted user root, group root Not trusting file /home/me/.../working-copy/.hg/hgrc from untrusted user root, group root 7648'! The message area says: Running hg annotate -d -n --follow -r... my-file.c...FAILED (status 255) I don't have anything in my .emacs related to vc or hg. Other commands, like vc-diff, work fine. What am I missing here?

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• Adding user to chroot environment

  - by Neo

  I've created a chroot system in my Ubuntu using schroot and debrootstrap, based on minimal ubuntu. However whenever I can't seem to add a new user into this chroot environment. Here is what happens. I enter schroot as root and add a new user.(Tried both adduser and useradd commands) The username lists up in /etc/passwd file and I can 'su' into the new user. So far so good. When I log out of schroot, and re-enter schroot, the user I created has vanished!! There is no mention of that user in /etc/passwd either. How do I make the new user permanent?

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• Unresponsive virtual OS

  - by confusedGeek

  Hopefully someone has a suggestion on how to resolve this. Configuration Host: Win 2003R2 w/Virtual Server 2005R2 Virtual1: Win 2003R2 w/Sql Server 2005 Virtual2: Win 2003R2 w/WSS 3.0 Situation This past weekend the power went out and took down the servers (no UPS, it's a desktop standing in as dev testing server). Since the servers went down the Virtual2 server after running WSS fairly heavily for an hour to two will become unresponsive via HTTP. If I login via virtual server's remote control I don't get anything beyond a background screen. The CPU counter on the virtual server's master status shows that it isn't doing anything. The only thing I have been able to do is to turn off Virtual2, which loses any state changes. Shutdown commands issue from the virtual server master status are ignored. After restarting Virtual2 the event logs and application logs don't indicate what caused the problem. Anyone have an idea as to how to repair the OS, or maybe what could be the problem? Thanks ahead of time.

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• Can I remove the ctrl-z key binding in my shell?

  - by Nagel

  The background for this question: I currently have to do a lot of my work in terminal over ssh, and I use screen quite a bit. Because I found the ctrl-a key binding for screen commands so annoying since I'm accustomed to using ctrl-a to go to the beginning of a line, I changed it to ctrl-z. The only problem with this is that when I'm in Matlab, think I am in Screen but am not, pressing ctrl-z will instantly kill my Matlab session, because ctrl-z is the key binding for suspending processes in *nix. So the question is: can I remove the key binding for ctrl-z in my shell so that it does no longer suspend a process? My shell is terminal.app on OSX.

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• Transfer many Gigabytes between two servers

  - by Bernhard

  Hello, I have a big problem. I have to move data from an old Webspace which is only accessibla by ftp. The new root server is accessible by ssh of course :-) I need to move all the data from the old space but the amount is just huge. Is there a way to move all the files directly from the old ftp to the storage and not over a third station (my local machine)? I´ve tried it with ftp but it didn't work. I think I´ve used the wrong commands. Is there a way to do this? Thank you in advance Bernhard

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• What are the requirements for gettings django translations to work?

  - by Espen Christensen

  Hi, I am hosting several djangosites on a CentOS 5 box. But I'm having difficulties with translations. So first i had to upgrade the gettext package from 0.14 to 0.16, but that didn't help. Now i can make and compile tranlsations files with the managment commands, but the translations does not show. I am sure that the translation files are located at the right place since they work with the same setup on a local installation, and django's own translation files does not work. (e.g the admin is not translated). What could i be missing in my server setup that makes this happen?

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• Upload a directory recursively to an FTP server

  - by Nicolas Raoul

  I am writing a Linux shell script to copy a local directory to a remote server (removing any existing files). Local server: ftp and lftp commands are available, no ncftp or any graphical tools. Remote server: only accessible via FTP. No rsync nor SSH nor FXP. I am thinking about listing local and remote files to generate a lftp script and then run it. Is there a better way? Note: Uploading only modified files would be a plus, but not required

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• Difference in behavior of reboot

  - by LinuxPenseur

  Hi, I have 2 machines running linux. In one machine, the reboot command is an executable normally found in all linux distributions. In the second machine the reboot command is a shell script customized using some other hardware tool commands to reboot the system. One behavior difference between the 2 machines is that when i execute reboot command on the first machine, it shows another shell prompt and then only reboots. But in the case of second machine, it reboots without showing a shell prompt. I expect the second machine to behave the same way as first machine when reboot command is given. Currently i am analyzing the source code of shutdown.c and halt.c normally found in linux distributions, so that i can find out the implementation which produces the shell propmt on reboot and use that in the shell script in second machine. Kindly give me some pointers on where i should start looking to find the implementation. Thanks

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• Do you have suggestions for these assembly mnemonics?

  - by Noctis Skytower

  Greetings! Last semester in college, my teacher in the Computer Languages class taught us the esoteric language named Whitespace. In the interest of learning the language better with a very busy schedule (midterms), I wrote an interpreter and assembler in Python. An assembly language was designed to facilitate writing programs easily, and a sample program was written with the given assembly mnemonics. Now that it is summer, a new project has begun with the objective being to rewrite the interpreter and assembler for Whitespace 0.3, with further developments coming afterwards. Since there is so much extra time than before to work on its design, you are presented here with an outline that provides a revised set of mnemonics for the assembly language. This post is marked as a wiki for their discussion. Have you ever had any experience with assembly languages in the past? Were there some instructions that you thought should have been renamed to something different? Did you find yourself thinking outside the box and with a different paradigm than in which the mnemonics were named? If you can answer yes to any of those questions, you are most welcome here. Subjective answers are appreciated! Stack Manipulation (IMP: [Space]) Stack manipulation is one of the more common operations, hence the shortness of the IMP [Space]. There are four stack instructions. hold N Push the number onto the stack copy Duplicate the top item on the stack copy N Copy the nth item on the stack (given by the argument) onto the top of the stack swap Swap the top two items on the stack drop Discard the top item on the stack drop N Slide n items off the stack, keeping the top item Arithmetic (IMP: [Tab][Space]) Arithmetic commands operate on the top two items on the stack, and replace them with the result of the operation. The first item pushed is considered to be left of the operator. add Addition sub Subtraction mul Multiplication div Integer Division mod Modulo Heap Access (IMP: [Tab][Tab]) Heap access commands look at the stack to find the address of items to be stored or retrieved. To store an item, push the address then the value and run the store command. To retrieve an item, push the address and run the retrieve command, which will place the value stored in the location at the top of the stack. save Store load Retrieve Flow Control (IMP: [LF]) Flow control operations are also common. Subroutines are marked by labels, as well as the targets of conditional and unconditional jumps, by which loops can be implemented. Programs must be ended by means of [LF][LF][LF] so that the interpreter can exit cleanly. L: Mark a location in the program call L Call a subroutine goto L Jump unconditionally to a label if=0 L Jump to a label if the top of the stack is zero if<0 L Jump to a label if the top of the stack is negative return End a subroutine and transfer control back to the caller halt End the program I/O (IMP: [Tab][LF]) Finally, we need to be able to interact with the user. There are IO instructions for reading and writing numbers and individual characters. With these, string manipulation routines can be written. The read instructions take the heap address in which to store the result from the top of the stack. print chr Output the character at the top of the stack print int Output the number at the top of the stack input chr Read a character and place it in the location given by the top of the stack input int Read a number and place it in the location given by the top of the stack Question: How would you redesign, rewrite, or rename the previous mnemonics and for what reasons?

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• dhclient and dhcpcd the real difference

  - by rubixibuc

  I can't figure out the difference from just the man pages. I can see what is a daemon and one is a client, but what does that mean practically when using the commands? Also what is the difference between the client and daemon in this case, not just the terms (client and daemon) but functionally wise? EDIT: How are the tasks divided, if the client updates the information on the client, what is the purpose of the daemon. I'm talking about the client daemon in this case dhcpcd not dhcpd. Both come installed by default with some versions of Linux and seem to share the duties of the dhcp client. NAME dhcpcd - DHCP client daemon Name dhclient - Dynamic Host Configuration Protocol Client

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• Serverlocation moved and how can I Move the files

  - by Bernhard

  Hello together, I´ve a big problem. I have to move data from an old Webspace which is only accessibla by ftp. No we have a new root server which is accessible by ssh of course :-) No i Need to move all data from the old space but there is a lot of Gb of files. Is there a way to fetch all files directly from the old ftp to the storage and not over a third station (my local machine)? I´ve tried it with ftp but without success. I think I´ve used the wrong commands. Is there a way to etablish something like this including all files and directorys? Thank you in advance Bernhard

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• Can I automatically add a new host to known_hosts ?

  - by gareth_bowles

  Here's my situation; I'm setting up a test harness that will, from a central client, launch a number of virtual machine instances and then execute commands on them via SSH. The virtual machines will have previously unused hostnames and IP addresses, so they won't be in the ~/.ssh/known_hosts file on the central client. The problem I'm having is that the first SSH command run against a new virtual instance always comes up with an interactive prompt: The authenticity of host '[hostname] ([IP address])' can't be established. RSA key fingerprint is [key fingerprint]. Are you sure you want to continue connecting (yes/no)? Is there a way that I can bypass this and get the new host to be already known to the client machine, maybe by using a public key that's already baked into the virtual machine image ? I'd really like to avoid having to use Expect or whatever to answer the interactive prompt if I can.

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• Very high memory usage, but not claimed by any process?

  - by SharkWipf

  While stress-testing LVM on one of our Debian servers, I came across this issue where memory would fill up a lot to the point where it would run the server out of memory, but no process would claim the memory. See http://i.imgur.com/cLn5ZHS.png, and see http://serverfault.com/a/449102/125894 for an explanation on the colors used in htop. Why is this happening? And is there any way to see what process is using the memory? Htop is configured not to hide any processes, so what is it that htop is missing? In this particular case, I can fairly certainly say that it is caused, directly or indirectly, by lvmcreate, lvmremove or dmsetup, as I was stress-testing that. Do note that this question is not about solving the LVM problem, but about why the memory isn't claimed by any process. Stopping all LVM commands does bring the memory back down to <600MB.

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• ZSH - output whole history?

  - by GorillaSandwich

  I recently switched from bash to zsh. In bash one way (besides recursive search) that I used to find previously-run commands was history | grep whatever, where whatever is the bit of command I remember. In zsh, this isn't working. history returns only a few items, even though my .zsh_history file contains many entries, which I have configured it to do. How can I output my whole history, suitable for searching with grep? (Note: I started out using ryanb's dotfiles, so perhaps it's a problem with his default settings?)

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• added shell script to sudoers still getting permission denied

  - by Bill S

  I don't understand this? Other uses of sudo work fine. [oracle@o plugins]$ su Password: [root@ plugins]# su nrpe bash-3.2$ /home/oracle/obiee/instances/instance1/bifoundation/OracleBIApplication/coreapplication/setup/bi-init.sh bash: /home/oracle/obiee/instances/instance1/bifoundation/OracleBIApplication/coreapplication/setup/bi-init.sh: Permission denied bash-3.2$ sudo -l Matching Defaults entries for nrpe on this host: env_reset, env_keep="COLORS DISPLAY HOSTNAME HISTSIZE INPUTRC KDEDIR LS_COLORS MAIL PS1 PS2 QTDIR USERNAME LANG LC_ADDRESS LC_CTYPE LC_COLLATE LC_IDENTIFICATION LC_MEASUREMENT LC_MESSAGES LC_MONETARY LC_NAME LC_NUMERIC LC_PAPER LC_TELEPHONE LC_TIME LC_ALL LANGUAGE LINGUAS _XKB_CHARSET XAUTHORITY" Runas and Command-specific defaults for nrpe: User nrpe may run the following commands on this host: (ALL) NOPASSWD: /home/oracle/obiee/instances/instance1/bifoundation/OracleBIApplication/coreapplication/setup/bi-init.sh bash-3.2$

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• Can't start a service (sudo) remotely from script and keep it running

  - by Greg Bernhardt

  I have a service (tomcat) that needs sudo to be started. I made a simple script on the remote server in /root/bin/test.sh #!/bin/sh sudo service tomcat start read (The script needs to do other stuff too, just pared down for simplicity). When I run a it directly on the remote server, tomcat starts and continues running on the server after I disconnect. When I run it remotely, the process starts, (I can see it when paused for the "read"), but once the script ends, it's gone. (while paused for the read, run this command locally) ps -ef | grep tomcat I've tried various combinations of nohup, screen, and & on the commands both on the local machine and in the remote machine's test.sh script, but I can't seem to get it working. ssh -t [email protected] "/root/bin/test.sh" ssh -t [email protected] "nohup /root/bin/test.sh" ssh -t [email protected] "nohup /root/bin/test.sh &" ssh -t [email protected] "screen /root/bin/test.sh &"

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• How do I create a guest ftp user and give access to specific sub-folder with SSH?

  - by gourav

  I just got a virtual dedicated server at GoDaddy. I got the Simple Control Panel. There doesn't seem to be a way to create a guest ftp user through this control panel and I was told it must be created through SSH. I have a program called Putty which can log into the server via SSH. I'm familiar with logging in but does anyone know what the commands are to be used to create a guest ftp user and give them Read and Write access to a particular folder? Regards gourav

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• Howto update Preview.app from the command line without losing focus on OSX ?

  - by snies

  Hello, i want to update Preview.app in the background from the command line without losing focus of my current window. I know that i can use the following to open/update the view of a file, but than i lose focus to the Preview.app. open -a Preview foo.pdf I guess there might be some clever Apple Script commands to do so but so far i didn't find the right one. Alternatively i would be interested into transfering the focus back to my current app directly after the update. I need this in order to update Preview.app's view of a pdf through a vi autocmd after i update the pdf according to changes in a tex file i am editing. Here is an example of what i want to achive but using Ubuntu and evince.

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• Shorewall SHOW DYNAMIC command doesn't work

  - by Andrew Burns

  Setting up shorewall dynamic zones, http://shorewall.net/Dynamic.html shows the command shorewall show dynamic zone where zone is one of your zones. I can get the add and delete commands to work, but not the show dynamic command. Here is a shell session, with output from ipset list that proves that the items are indeed there. $ ipset list CPREM_br0 Name: CPREM_br0 Type: hash:ip Header: family inet hashsize 1024 maxelem 65536 Size in memory: 16520 References: 66 Members: 192.168.85.153 $ shorewall add br0:192.168.85.200 CPREM Host br0:192.168.85.200 added to zone CPREM $ shorewall show dynamic CPREM $ ipset list CPREM_br0 Name: CPREM_br0 Type: hash:ip Header: family inet hashsize 1024 maxelem 65536 Size in memory: 16536 References: 66 Members: 192.168.85.153 192.168.85.200 $ shorewall delete br0:192.168.85.200 CPREM Host br0:192.168.85.200 deleted from zone CPREM $ ipset list CPREM_br0 Name: CPREM_br0 Type: hash:ip Header: family inet hashsize 1024 maxelem 65536 Size in memory: 16536 References: 66 Members: 192.168.85.153 I am using the packaged version from Ubuntu 12.04 (4.4.26.1-1)

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• Windows CMD, show the current folder name at prompt dynamically like Bash

  - by guneysus

  I am trying to modify my CMD, to show only current dir name dynamically like: Desktop $ When i switched the folder, it must be updated. It is not required to be code in purely batch file, it may depend any external commands, cygwin bash, etc. @echo off set a=bash -c "pwd | sed 's,^\(.*/\)\?\([^/]*\),\2,'" %a% cmd outputs _test-et Microsoft Windows [Version 6.3.9600] (c) 2013 Microsoft Corporation. Tüm haklari saklidir. >> But >> prompt %a% gives bash -c "pwd | sed 's,^\(.*/\)\?\([^/]*\),\2,'"

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