Search Results

Search found 8028 results on 322 pages for 'unix shell'.

Page 243/322 | < Previous Page | 239 240 241 242 243 244 245 246 247 248 249 250  | Next Page >

• I know the big picture but can't put it in place

  - by Simbilim

  Hi, I'm interested in web development and by that I mean the bigger projects like facebook or twitter. I know the basics of java, css, php and mysql. I know there is a lot more out there. I read about it. But I don't know what the purpose is and how to put in place. Things like: Scribe, thrift, casandra, Unix/Linux, shell/perl/python scripting, PostgreSQL, MongoDB, non-relational NoSQL datastores, JVM, nginx I want to know why they need it, how they use it and what te purpose is. What I need is a book like technical background of facebook for dummies or so. Are there any books or websites that explain this from scratch? Thank you!

  Read the article

• How to manipulate this string of text to make it readable?

  - by Kenny

  I have this string in an excel file: 4603,2504603#;4616,2504616#;4617,2504617#;4519,2504519#;4620,2504620 (It's actually a lot longer than that, but the pattern is the same). I need to be able to some how sort this into something that can be read easier. I want the end result to look like this: 4603,2504603 4616,2504616 4617,2504617 I guess I need a program or command that can replace #; with a line break. I need something that will work in Windows 7. I remember doing something similar to this in a Linux class using shell scripting but I can't remember how it was done. Note: This is NOT homework. It is something my boss has asked me to do at work.

  Read the article

• Use SSH reverse tunnel to bypass VPN [on hold]

  - by John J. Camilleri

  I have shell access to a server M, but I need to log into a VPN on my machine L in order to access it. I want to be able to get around this VPN, and I've heard I can do this by creating a reverse SSH tunnel and using a intermediate server E (which I can access without the VPN). This is what I am trying: Turn on VPN on L, open SSH session to M On M, execute the command: ssh -f -N -T -R 22222:localhost:22 user@E From L, try to open SSH session to E on port 22222, hoping to end up at M Step 2 seems to work without any complaint, but on step 3 I keep getting "connection refused". I have made sure that port 22222 is open on E: 7 ACCEPT tcp -- anywhere anywhere tcp dpt:22222 I'm pretty new to SSH tunnelling and not sure what the problem could be. Any ideas what I can try?

  Read the article

• What books help one to learn to read code?

  - by Daniel

  Lion's Commentary on Unix Sixth Edition with Source Code is a wonderful book to learn how to read code. Reading code is important -- how does one learn how to write excellent code without having read excellent code? But, sadly, while great writers, of fiction and non-fiction, all spend a great deal of time reading stuff, we, programmers, seem to avoid it like the plague. Worse still, programming books usually go the same way. They might show a pattern or a style, but they often avoid showing good, complex code, and helping one go through it. There are exceptions, of course. I hope. So, with that in mind, what books are to be found which help one learn how to read code?

  Read the article

• check whether fgets would block

  - by lv

  Hi, I was just wondering whether in C is it possible to peek in the input buffer or perform similar trickery to know whether a call to fgets would block at a later time. Java allows to do something like that by calling BufferedReader.ready(), this way I can implement console input something like this: while (on && in.ready()) { line = in.readLine(); /* do something with line */ if (!in.ready()) Thread.sleep(100); } this allows an external thread to gracefully shutdown the input loop by setting on to false; I'd like to perform a similar implementation in C without resorting to non portable tricks, I already know I can make a "timed out fgets" under unix by resorting to signals or (better, even though requering to take care of buffering) reimplement it on top of recv/select, but I'd prefer something that would work on windows too. TIA

  Read the article

• Emacs can't find my installed modules

  - by XVirtusX

  I run Perl/Tk or WWW::Mechanize just fine using terminal but when I try to invoke the interpreter through Emacs shell (M-!), it dies with a message: Can't locate tk.pm in @INC (@INC contains: /etc/perl /usr/local/lib/perl/5.12.4 /usr/local/share/perl/5.12.4 /usr/lib/perl5 /usr/share/perl5 /usr/lib/perl/5.12 /usr/share/perl/5.12 /usr/local/lib/site_perl .) at perl-tk.pl line 2. Obviously, this array @INC doesn't hold the path to my modules, the question is, how can I do that? I didn't find anything on emacs manual. I also googled it but to no avail.

  Read the article

• How do I know I'm running inside a linux "screen" or not?

  - by Jun Chen

  The "screen" refers to a program mentioned in How to reconnect to a disconnected ssh session . That is a good facility. But there is a question I'd really like to know. How do I know whether I'm running inside a "screen"? The difference is: If yes, I know I can safely close current terminal window, e.g., close a PuTTY window, without losing my shell(Bash etc) session. If no, I know I have to take care of any pending works before I close the terminal window. Better, I'd like this status to be displayed in PS1 prompt so that I can see it any time automatically.

  Read the article

• Transfer of directory structure over network

  - by singh

  I am designing a remote CD/DVD burner to address hardware constraints on my machine. My design works like this: (analogous to a network printer) Unix-based machine (acts as server) hosts a burner. Windows-based machine acts as client. Client prepares data to burn and transfers it to the server. Server burns the data on CD/DVD. My question is: what is the best protocol to transfer data over the network (Keeping the same directory hierarchy) between different operating systems?

  Read the article

• cd (change directory) to my home directory on Windows [closed]

  - by deostroll

  Possible Duplicate: Is there a short cut command in Windows command prompt to get to the current users home directory like there is in Linux? Any short way to cd to the user specific directories in the command prompt. Like for e.g. in linux shell (debian based) we do a cd ~ and it instantly takes to the current logged user's directory /home/<username>. Anything to this effect on windows? ps: currently trying to do this on xp machines. If it differs for other machines, mention that too.

  Read the article

• Arguments to convince to switch from CVS to SVN

  - by ereOn

  Hi, The UNIX department of my company currently uses CVS as source-version control system. They use it in a very strange way: different repositories for development/testing/production code (for the same project), no one tags anything, weird directory architecture, and so on. The system has been set for ages but now, I have an opportunity to organize a meeting where I have to suggest changes. I'd like to make them change from CVS to SVN (Mercurial or Git might be even better, however I can't really recommand using a system I don't know well, and switching to SVN will already be a great step forward). I don't have much experience with CVS so I can't compare them efficiently: I just know it doesn't support atomic operations and that it is deprecated. What killer arguments would you use to convince my collegues to do the switch ? Thank you very much.

  Read the article

• Maintaining Logging and/or stdout/stderr in Python Daemon

  - by dave mankoff

  Every recipe that I've found for creating a daemon process in Python involves forking twice (for Unix) and then closing all open file descriptors. (See http://www.jejik.com/articles/2007/02/a_simple_unix_linux_daemon_in_python/ for an example). This is all simple enough but I seem to have an issue. On the production machine that I am setting up, my daemon is aborting - silently since all open file descriptors were closed. I am having a tricky time debugging the issue currently and am wondering what the proper way to catch and log these errors are. What is the right way to setup logging such that it continues to work after daemonizing? Do I just call logging.basicConfig() a second time after daemonizing? What's the right way to capture stdout and stderr? I am fuzzy on the details of why all the files are closed. Ideally, my main code could just call daemon_start(pid_file) and logging would continue to work.

  Read the article

• How Do Sockets Work in C?

  - by kaybenleroll

  I am a bit confused about socket programming in C. You create a socket, bind it to an interface and an IP address and get it to listen. I found a couple of web resources on that, and understood it fine. In particular, I found an article Network programming under Unix systems to be very informative. What confuses me is the timing of data arriving on the socket. How can you tell when packets arrive, and how big the packet is, do you have to do all the heavy lifting yourself? My basic assumption here is that packets can be of variable length, so once binary data starts appearing down the socket, how do you begin to construct packets from that?

  Read the article

• How can I make zsh completion behave like Bash completion?

  - by Nate

  I switched to zsh, but I dislike the completion. If I have 20 files, each with a shared prefix, on pressing tab, zsh will fully complete the first file, then continue going through the list with each press of tab. If I want one near the end, I would have to press tab many times. In bash, this was simple - press tab and I would get the prefix. If I continued typing (and pressing tab), bash would complete as far as it could be certain of. I find this behavior to be much more intuitive but prefer the other features of zsh to bash. Is there a way to get this style of completion? Google suggested setopt bash_autolist, but this had no effect for me (and no error message was printed upon starting my shell). Thanks.

  Read the article

• How to set a complex custom crontab in google-app-engine (java)?

  - by Shreeni

  I am building an app for which I need to set up cron jobs. What I want to do is to set the specific minutes in a hour where specific crons should run. For instance: Task1 at 1st minute of the hour Task2 on every second minute of the hour Task3 every 2 minute only in the second half of the hour Building this in the standard Unix cron format is reasonably straightforward, but could not figure out how to do it in the Google-App-Engine. The documentation does not list any non-trivial examples. Any suggestions on how to do it? Examples would be excellent.

  Read the article

• Use C function in C++ program; "multiply-defined" error

  - by eom

  I am trying to use this code for the Porter stemming algorithm in a C++ program I've already written. I followed the instructions near the end of the file for using the code as a separate module. I created a file, stem.c, that ends after the definition and has extern int stem(char * p, int i, int j) ... It worked fine in Xcode but it does not work for me on Unix with gcc 4.1.1--strange because usually I have no problem moving between the two. I get the error ld: fatal: symbol `stem(char*, int, int)' is multiply-defined: (file /var/tmp//ccrWWlnb.o type=FUNC; file /var/tmp//cc6rUXka.o type=FUNC); ld: fatal: File processing errors. No output written to cluster I've looked online and it seems like there are many things I could have wrong, but I'm not sure what combination of a header file, extern "C", etc. would work.

  Read the article

• .htaccess causes links on page to try an open a BIN file?

  - by user1796820

  My friend's site which I agree to tech-advise, is psychtalkonline.com. You can go check it out, it's an anonymous forum (miniBBS) running Apache on Unix. I at first had a problem with mod_rewrite but then I uploaded the .htaccess file. However, that seemed to cause problems. If you click on any link, you will get a pop-up saying "You have chosen to open which is a BIN file". If you click the source code, and click on the links in the source code, you will see that it goes to the BIN file. I'm not really sure what's going on. I really would appreciate some help. Thanks.

  Read the article

• How to use ccache selectively?

  - by Anonymous

  I have to compile multiple versions of an app written in C++ and I think to use ccache for speeding up the process. ccache howtos have examples which suggest to create symlinks named gcc, g++ etc and make sure they appear in PATH before the original gcc binaries, so ccache is used instead. So far so good, but I'd like to use ccache only when compiling this particular app, not always. Of course, I can write a shell script that will try to create these symlinks every time I want to compile the app and will delete them when the app is compiled. But this looks like filesystem abuse to me. Are there better ways to use ccache selectively, not always? For compilation of a single source code file, I could just manually call ccache instead of gcc and be done, but I have to deal with a complex app that uses an automated build system for multiple source code files.

  Read the article

• Perl module for parsing natural language time duration specifications (similar to the "at" command)?

  - by Ryan Thompson

  I'm writing a perl script that takes a "duration" option, and I'd like to be able to specify this duration in a fairly flexible manner, as opposed to only taking a single unit (e.g. number of seconds). The UNIX at command implements this kind of behavior, by allowing specifications such as "now + 3 hours + 2 days". For my program, the "now" part is implied, so I just want to parse the stuff after the plus sign. (Note: the at command also parses exact date specifications, but I only want to parse durations.) Is there a perl module for parsing duration specifications like this? I don't need the exact syntax accepted by at, just any reasonable syntax for specifying time durations. Edit: Basically, I want something like DateTime::Format::Flexible for durations instead of dates.

  Read the article

• How can I profile a subroutine without using modules?

  - by Zaid

  I'm tempted to relabel this question 'Look at this brick. What type of house does it belong to?' Here's the situation: I've effectively been asked to profile some subroutines having access to neither profilers (even Devel::DProf) nor Time::HiRes. The purpose of this exercise is to 'locate' bottlenecks. At the moment, I'm sprinkling print statements at the beginning and end of each sub that log entries and exits to file, along with the result of the time function. Not ideal, but it's the best I can go by given the circumstances. At the very least it'll allow me to see how many times each sub is called. The code is running under Unix. The closest thing I see to my need is perlfaq8, but that doesn't seem to help (I don't know how to make a syscall, and am wondering if it'll affect the code timing unpredictably). Not your typical everyday SO question...

  Read the article

• Is there a c++ library that provides functionality to execute an external program and read its outpu

  - by BD at Rivenhill

  Basically, I'm looking for something that will allow me to replicate the following Perl code: my $fh = new FileHandle; $fh->open("foo |"); while (<$fh>) { # Do something with this line of data. } This is in the context of Linux, so a library that is specific to Windows will not help. I know how to write a program that does fork/exec/dup2 and all that basic shell-type jazz, but there are some fiddly details involving terminals that I don't feel like messing around with (and I don't have a copy of "Advanced Programming in the UNIX Environment" or a similar reference handy), so I'm hoping that someone has already solved this problem.

  Read the article

• Dialog boxes font is missing in Windows 7

  - by forgetso

  About 3 years ago I messed up my laptop with some virus removal software. It's obviously changed the registry settings and the text in dialogue boxes in the control panel, run box, etc. is the wrong size. See image:http://i.stack.imgur.com/SlFFU.jpg I've tried changing the MS Shell Dlg registry values to different fonts and restarting. I've made sure that I have the fonts SSERIFE.FON and SERIFE.FON on my system and that they are correctly referenced in the registry. Does anyone know how to fix this? I'd like to be able to see all of the options in the dialog boxes! Cheers

  Read the article

• How do I pull a backup from a Linux server to my Windows PC using rsync?

  - by Nogwater

  I'm currently using sftp to download nightly backups (.tar.gz) from my web host to my desktop computer. I think I'd like to switch to rsync to minimize the bandwidth (and time). I have cygwin installed on my PC, but don't use it for much. I have shell access to my web host via ssh (PuTTY). Let's say my source directory is myserver.com:/home/username/backups/, I want to grab all of the .tar.gz files from there, and I want to save them to C:\Backups\ locally.

  Read the article

• Library for Dataflow in C

  - by msutherl

  How can I do dataflow (pipes and filters, stream processing, flow based) in C? And not with UNIX pipes. I recently came across stream.py. Streams are iterables with a pipelining mechanism to enable data-flow programming and easy parallelization. The idea is to take the output of a function that turns an iterable into another iterable and plug that as the input of another such function. While you can already do this using function composition, this package provides an elegant notation for it by overloading the operator. I would like to duplicate a simple version of this kind of functionality in C. I particularly like the overloading of the operator to avoid function composition mess. Wikipedia points to this hint from a Usenet post in 1990. Why C? Because I would like to be able to do this on microcontrollers and in C extensions for other high level languages (Max, Pd*, Python). * (ironic given that Max and Pd were written, in C, specifically for this purpose – I'm looking for something barebones)

  Read the article

• PHP: producing relative date/time from timestamps

  - by KeyStroke

  Hi, I'm basically trying to convert a Unix timestamp (the time() function) to a relative date/time that's both compatible with past and future date. So outputs could be: 2 weeks ago 1 hour and 60 minutes ago 15 minutes and 54 seconds ago after 10 minutes and 15 seconds First I tried to code this, but made a huge unmaintainable function, and then I searched the internet for a couple of hours, yet all I can find are scripts that produce only one part of the time (e.h: "1 hour ago" without the minutes). Do you have a script that already does this? If so, I'd really appreciate if you could share it. Thanks.

  Read the article

• Hyper-V: determine the guest's name given the GUID

  - by syneticon-dj

  How would I go about determining the guest's name given its GUID or vice-versa, preferably with only the Hyper-V/Server Core stock install at hands? Rationale: I am in favor of having a repository of dirty tricks to revert to when in great need. To immediately quiesce all (storage) operations of a VM guest without losing the state, I used to run kill 17 <all VM's virtual processes> (signaling SIGSTOP) and resumed afterwards using kill 19 <all VM's virtual processes> (signaling SIGCONT) in ESXi/vSphere shell. I tried the same technique with Hyper-V using Process Explorer's "Suspend" functionality on the vmwp.exe processes and it seemed to work. I have yet to find a way for easily identifying the processes to suspend, though - the vmwp command line is only listing a GUID.

  Read the article

< Previous Page | 239 240 241 242 243 244 245 246 247 248 249 250  | Next Page >