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 fi...
What's the "correct" way to create a custom daemon in Ubuntu, that will start at boot time and be controllable by Ubuntu's standard daemon start/stop commands? Can I just copy and paste one of the scripts in /etc/init.d or do I need to "register" the daemon somewhere else? ...
Hi How do I use mqueue (message queue) in a c program on a Linux based system? I'm looking for some good code examples that can show how this is done in a correct and proper way, maybe a howto. Thanks ...
I was looking for the best way to find the number of running processes with the same name via the command line in Linux. For example if I wanted to find the number of bash processes running and get "5". Currently I have a script that does a 'pidof ' and then does a count on the tokenized string. This works fine but I was wondering if the...
Hello, I wonder if anyone knows how could I rename multiple files, all of them originally named with same structure, and add some data extracted from a mysql DB according to specifics rules. For example I have 500 files named with this vars: ID NAME ADDRESS PHONE.wav => 1234567 PAULSIMON WESTDR122 9942213456.wav Now I need to rename ...
Hi, I am trying to understand Linux Kernel implementation of linked list and hash table. A link to the implementation is here. I understood the linked list implementation. But i am little confused of why double pointers is being used in hlist (**pprev). Link for hlist is here. I understand that hlist is used in implementation of hash t...
Hi, I am using vi(not Vim) and I would like to continually undo the changes made. u works for a single command undo and Ufor a single line undo. But Is there a way to undo continuously like vim(I recall a command in vim can even undo changes by time!) in vi? Thanks in Advance. Edit: I am using vi version 3.10 ...
hi, ive found some portable lamp servers like xampp lite but i cant found one that runs on linux, all they are for windows i need only a lamp server, not a virtual image of a linux system..., i want to run web applications from the usb. ...
Hi, in my c++ software I've used Boost in some parts and also for the local time. OK, now my problem is to make a check if in my machine is active or not the DST. With the follow part of code I can know only the difference from the UTC time. In my case the difference is 2 hours because is active the DST ptime tLoc = second_clock::loca...
Possible Duplicate: How to cross compile from Mac OS X to Linux x86? I have an application that I wrote in C++/SDL, using FMOD library. The app is portable and compiles without any code change on Mac and on Linux. But one annoyance is that when I want to ship Linux version, I have to run my Linux box, copy the source code over...
Can dirtiness of pages of a (non-shared) mmap be accessed from userspace under linux 2.6.30+? Platform-specific hacks and kludges welcome. Ideally, I'm looking for an array of bits, one per page (4kB?) of the mmap'ed region, which are set if that page has been written to since the region was mmap'ed. (I am aware, that the process doin...
Hi all. How can i determine the Linux version (distribution) for which was compiled rpm packet? ...
Dear friends I use the following command syntax to search params in my script grep -qsRw -m1 "any_param" /dir/..../ Some times the search take avery long time The question is how to add time out to grep command For example after 20 seconds grep will break out If it not illegal to add time out to grep , how it will possible on other ...
Is syntax highlighting there on vi?. I am sshing to an AIX box via putty in windows xp and using vi. I would like to know if there is syntax highlighting feature in vi.(My google-fu failed as all the results pertaining to vi point to vim). If this exists, Is it possible to get the colors in putty?.(I doubt it though, as sending the color...
I am using SUSE 10 Linux on a machine with 16 G ram and 2 quad core CPUs. There are 8 processes which are doing some work (CPU intensive/network i/o). Out of which 4 have a memory leak (These are test conditions so no problem in having leaks here). Total space is occupied by all processes is around 15.4 G only 200 MB is free in system. ...
I have an understanding of windows COM and the ideas behind it. I am trying to understand if *nix systems even have an equivalent or why they don't? ...
When you run a Java Servlet Container that you would like to serve both static and dynamic content on port 80 you have the classic question of whether to run the server as: As root in hopefully a chroot jail if you can (haven't gotten this working yet) As a non root user and then use IPTables to forward port 80 to some other port (>102...
I installed i18ndude (an internationalization utility to be used in Plone) using easy_install. When I try to run the utility i18ndude on my terminal, I get: /usr/local/lib/python2.6/dist-packages/i18ndude-3.1.2-py2.6.egg/i18ndude/odict.py:7: DeprecationWarning: object.__init__() takes no parameters dict.__init__(self, dict) How do ...
mv command doesnt accept pattern matching like grep ! Whats the good way to handle this and similar kind of operations ? ...
I want to learn how to write shell scripts. Particularly I want to write a svn post-commit script to upload files from a test server to a production server. I am sure I will want to write more as I get more into it. I have very little linux/unix knowledge. Can anyone recommend a good book? ...