linux

Reverse the contents of each line in a file?

I was hoping someone could help me, I need to reverse the contents of each line in a file. So basically this: 101.228.168.192 to 192.168.228.101 Is there a command I could use in a bash script, or even just the logic needed to get the job done. Thanks ...

Cron job from php (at command to be exact)

Hi, I want to run a script just ONCE by setting up a cron job using "at" command. I'm using this now: <?php include "config.php"; if (isset($_POST['add'])) { $sql = mysql_query("INSERT INTO {$table}(msg) VALUES('{$_POST['msg']}')"); if ($sql) { $cmd = "wget /var/www/index.php?id=" . mysql_insert_id() . " | sudo at " . $_POST['runa...

Looking for a network-accessible hash table

I have a data acquisition application broken into a client and a server. The server is reponsible for grabbing data from the hardware, running some realtime analysis, and recording the data to disk when it's asked. The client is a GUI that the operator can use to look at some pretty graphs (generated by the server), set some parameters...

Extracting a table from a mysql.sql dump file

I have a products table in a mysql.sql file. I wish to extract that one table and place it in it's own file. How would you go about doing this? ...

Lock or Pin java process into memory

Hi, Is there a way to lock a java process into memory. Using something like mlock/mlockall it is possible to lock the memory of a process into memory, so that it doesn't get swapped out. With this approach is it possible to write a C wrapper before invoking the java process to lock the java process into memory? If so, how would the wr...

How do I create a X-windows window independent of the current window manager?

I am playing with X-windows, Xlib, etc. I want to create a X-window independent of the window-manager: meaning that I do not want the WM to put a frame, minimize-maximize, close, menu, title-bar, etc. in the window. I want to create a vanilla X window. How? [edit] Alternatively, how to I capture those events so my windowing app can at l...

Is there a glibc hash function?

Hey, I'm looking to do a custom hash table implementation in C. Is there an MD5/SHA1 hash function already in the GNU library or do I have to use an external library for this? Here's kinda what I'm looking for: int hashValue; hashValue = MD5_HASH(valToHash); ...

Compiling objective c on Linux

Hi, I am trying to compile the following example from http://www.otierney.net/objective-c.html. It consists of three files: Fraction.h #import @interface Fraction: NSObject { int numerator; int denominator; } -(void) print; -(void) setNumerator; -(void) setDenominator; -(int) numerator; -(int) denominator; @end F...

How to generate core dumps for daemon processes in centos?

Hi, I have some daemon processes that crashes every now and then and I want to know how I can enable core dump generations. I know that by default on linux ulimit for core dumps is zero so I need to set it to unlimited if I want to see core dumps for processes that I am running. But what I want to do is to generate core dumps for daemon...

How to create sound from an array of double and play it on speaker.

I have an array of double (size more than 60k entries), I have the frequency value. Now I want to create a sound from it using C/C++ which I can play on speaker. My OS is linux. Thanks. I hope I am clear enough. ...

SVG to SWF on Linux?

Any application or method can export SVG or any vector format to SWF from Ubuntu Linux? ...

Listing of running Java applications on linux

Do you guys have some script or GUI tool that would give you nice and transparent listing of running java applications ? I'm using $ps ouput that I grep through for "java" keyword, but usually I'm running eclipse, tomcat, nexus, database IDE and a few others, all of them with many parameters and I'm spending too much time searching throu...

How to get a process tree trace/log of a process in linux?

Hello, I want to know what executables a script launches and in what order (and trace those executables recursively). For example, let's say I have a bash script here (called abc.sh): #!/bin/bash ls gcc I'd like to run this script with a "trace/log command" and get something like this: abc.sh -- ls |-- gcc -- cpp ...

How to supply password in crontab

I am writing the command in crontab and its output is first asking the password. Is there any way to supply the password with command like mount -a < password ...

Scripting rsync backup and restore from Windows to Linux

Hi, I have a fairly simply batch file to backup a Directory on Server 2008 using cwrsync to a Linux server, and to restore. Backup script: @ECHO OFF SETLOCAL SET CWRSYNCHOME=C:\Program Files (x86)\cwRsync SET CYGWIN=nontsec SET HOME=%HOMEDRIVE%%HOMEPATH% SET CWOLDPATH=%PATH% SET PATH=%CWRSYNCHOME%\BIN;%PATH% rsync -e "ssh -i new.key"...

What is the minimum/ideal memcached stack for a dedicated memcached virtual cluster

Currently I am considering: VMWare Hypervisor ESXi CentOS 5.5 Memcached 1.4.5 and dependencies That is ALL. Is there anything else I need/any substitutions? ...

I want to remove php-5.3. completely from my machine after make it from source.

I want to remove php-5.3. completely from my machine after make it from source. how can this be done? When i try make uninstall i get: make: * No rule to make target `uninstall'. Stop. Thanks. ...

"file not found " error while creating a static library in c using gcc - linux

I have a file hello.c #include<stdio.h> void hello() { printf("Hello!\n"); } A header hello.h #ifndef _hello_ #define _hello_ void hello(); #endif main.c #include<stdio.h> #include "hello.h" int main() { hello(); return 0; } I am currently in the folder /home/user/name/programs I am trying to build a static libra...

Ubuntu lucid, maverick high iowait

I'm using Ubuntu, and I've got the same problem with Lucid and Maverick. From time to time, especially a few minutes after boot, the iowait goes between 50-100% and the box is unusable. Everything that tries to access the disk freezes. I have the following setup: Hard disk: Model Family: Western Digital Caviar Green family Devic...

How to install Redmine on Fedora 11 linux?

I would like to install REDMine on my LINUX LAMP. First i need to install ROR. http://www.redmine.org Provide steps if anybdoy has done installation ...