Hello, I'm currently having some issues with a Java application I'm developing. Namely the JVM is crashing with a segfault. I'm trying to locate the hs_err.log file which should contain some helpful info about the issue. However, I can't find this file. I've used find, locate, etc, and nothing. Any ideas on why the log file isn't bei...
How do I list all members of a group in Linux (and possibly other unices)? ...
Hello. I'm trying to develop a simple IRC bot. First I want to think out a proper design for this project. One of the things I'm wondering about right now is the read mechanism. I develop this bot on a Linux system. (Fedora 12) To read from a socket I use the system call "read()". I plan to use the reading functionality in the following...
Is there any software/script that will allow me to cd (change directories) into .jar/.ear/.zip files and edit the contents of the files it contains? I'm working on a large EJB project (yuck), and I frequently find myself in situations like the following: something.ear/ |-- something.jar/ | `-- fileINeedToEdit.xml I work primarily v...
Hello, I've a php script that's started each minute from cron. It almost always runs without any problem, except for about 10 times within 24h. The times it fails I get a segmentation fault like: bin/sh: line 1: 21815 Segmentation fault /usr/bin/myscript The number after "line 1:" is always different. I'm running: PHP 5.2.6-1+l...
REMOVED - reason: not really needed. my questions are: can I use a linux UDP socket from two different threads? answer was here I have two different events I would like to wait for using just one thread. One of such events is the addition of an element to a stack and another is the availability of data on a socket. I can use a boost::...
I'm trying to find the proper command in subversion to see a list of all the files that have changed (don't need to see the changes really) between branch/tag A and branch/tag B, etc. ...
How can I get the following output using linux command by comparing two text files? Thanks. file1: site110 site120 file2(Updated): domain1.com - site110 domain2.com - site111 domain3.com - site112 domain4.com - site113 domain5.com - site120 domain6.com - site1201 domain7.com - site1202 output: ...
I'm aware that it is possible to use 'readelf -d | grep RPATH' to inspect a given binary from the shell, but is it possible to do this within a process? Something like (my completely made up system call): /* get a copy of current rpath into buffer */ sys_get_current_rpath(&buffer); I'm trying to diagnose some suspect SO linking ...
OK, so that's maybe not the best title, but I don't know exactly what I want to do, so, please, hear me out. I've used Windows pretty much all my life although I played with Linux on several occasions. At work everyone does web development with php on Windows using the same IDE and stuff. I would like to experience the powerful Linux c...
I want to use an embed an sqlite database into an existing tcl application (migrated from flat-file). Currently; our tcl interpreter is run from a network location; <nfs share>/bin/tclsh8.3 I do have an nfs $PATH for executables set for all users already; I am assuming I can place a standalone sqlite3 executible there; though I have b...
I have a linux kernel module that needs to find the speed of a given network interface (i.e. "eth0"). For linux 2.6.31 how would I find the speed (configured/negotiated)? ...
Is there a way to trace through function calls at the lowest levels of the Android system? Right now when I debug in Eclipse, it goes through the source files that are located inside the frameworks folder, but is it possible to go even lower? For example show what functions are being called from the libcore folder. I am also interested t...
How can I search the memory state of an process in Linux? Specifically I wish to identify certain regions of interest, and peek at them at regular intervals, possibly occasionally poking new values. I suspect an answer may involve calls to ptrace(), and reading /proc/[pid]/mem, but need more to go on. ...
Hi, I'm establishing a connection to the X server like this: display = XOpenDisplay(NULL); screen = DefaultScreen(display); depth = DefaultDepth(display, screen); I'm wondering now why "depth" is always set to 24. I would expect that it is only 24 when compositing is turned off, but in fact, it is still 24 even when I turn on composi...
Hello everyone, I am new to Linux. And I am using Red Hat Enterprise Version 5. There is a ruby program which use standard input as its input (e.g. the Ruby program process input from standard input). I think standard input should be keyboard, correct? So, I think other kinds of input (non-standard input) should not work (i.e. the ruby...
I know Ruby right now, however I want to learn a new language. I am running Ubuntu 10.04 right now but I am going to get a Mac later this summer. Anyways I want something more for GUI development. I was wondering if I should learn C on Ubuntu right now, and then learn Objective-C when I get an iMac? Will learning C give me an edge? Or sh...
Hi, I have read some comments in some forums saying that Linux programmers usually do not use any IDE. They prefer to use Vim and Emacs to do their programming. If I'm not mistaken, Vim and Emacs are just text editors, similar to notepad, but with syntax highlighting. I just want to know how Linux programmers create complicated GUI ap...
Question: I get this error message: export: bad interpreter: No such file or directory when I execute this bash script: #!/bin/bash MONO_PREFIX=/opt/mono-2.6 GNOME_PREFIX=/opt/gnome-2.6 export DYLD_LIBRARY_PATH=$MONO_PREFIX/lib:$DYLD_LIBRARY_PATH export LD_LIBRARY_PATH=$MONO_PREFIX/lib:$LD_LIBRARY_PATH export C_INCLUDE_PATH=$MON...
Hi I just install ubuntu 10.04. I use to use wamp server on windows that have manager panel. Is lamp have such panel, or I have to time manually? Thanks, Yosef ...