hi, I'm distributing custom applications for redhat. I want to set up my update server to have the client applications auto-updated. I need the update process to be secured. Can the connection to the update server secured and certified ? Is there an encrypted update method ? With server certificate check ? Thanks. ...
Hello, my machine is continously making udp dns traffic request. what i need to know is the PID of the process generating this traffic. The normal way in TCP connection is to use netstat/lsof and get the process associated at the pid. Is UDP the connection is stateles, so, when i call netastat/lsof i can see it only if the UDP socket...
I am using Nginx as a proxy to 4 apache instances. My problem is that SSL negotiation takes a lot of time (600 ms). See this as an example: http://www.webpagetest.org/result/101020_8JXS/1/details/ Here is my Nginx Conf: user www-data; worker_processes 4; events { worker_connections 2048; use epoll; } http { include ...
Hello guys, i am new to the Operating System development , and in college i have to add a system call to linux kernel, could you guys give me some in sight on what i will have to learn to be able to do this please. i have to extend the linux kernel, so any cool ideas would also be very helpful... thank you ...
On a unix system, how do I monitor (like how 'tail' works) a directory for changes made to files - either new ones created, or size changes, etc. Looking for a command line tool rather than something to be installed. ...
Lets say I have a variable which has values : #!/bin/sh MYVARIABLE="first,second,third" for vars in MYVARIABLE do echo $vars done this above doesn't work what I want but it looks fine, this should print first second third without , I wan't it to be printed without , any sugestions? ...
Hi All, I am developing embedded software for an ARM-based target. The target software is compiled/linked using gcc (arm-none-eabi) and debugged using GDB (arm-none-eabi). The tool-chain has been successfully validated. To easy debugging of software I would like to use a graphical debugger interfaces based on GDB. The candidates are DDD...
I would like to assign /dev/fbX device like below. /dev/fb0 for USB-LCD device. /dev/fb1 for Main Display device. I try that. ver.1:created /etc/udev/rules.d/91-udev-fb.rules KERNEL=="fb0", ATTR{name}=="VESA VGA", ACTION=="add", NAME="fd1" KERNEL=="fb1", ATTR{name}=="I-O DATA USB-RG", ACTION=="add", NAME="fd0" result. ls /dev shown a ...
I have a separate servers running with postgres and Nagios. I want to use "psql_replication_check.pl" with nagios to monitor the postgres replication status. This check script requires DBD::Pg module to connect to database. Installation of DBD::Pg asking for the path of pg_config file. #perl Makefile.PL Configuring DBD::Pg 2.17.1 Path ...
Good day shell lovers! basically i have two files: frequency.txt: (multiple lines, space separated file containing words and a frequency) de 1711 a 936 et 762 la 530 les 482 pour 439 le 425 ... and i have a file containing "prohibited" words: stopwords.txt: (one single line, space separated file) au aux avec le ces dans ... so ...
i want to create a C program ...
Hi everyone, I am currently stumbled into this problem and I'd love to hear some suggestions from you. I have a C++ program that uses a precompiled library to make some queries to PostgreSQL database. Now the problem is I want to find out the total (combined) cpu time it takes to do all routines described in the source code of the prog...
I'm using a PHP contact form and it is sending mail to non gmail addresses, however when I set it to send to a gmail address, it doesn't get delivered (it doesn't even appear in junk mail). I've heard of issues like this before - I'm not a web developer/expert so can anybody suggest code/configuration changes to my PHP contact form belo...
I am using BASH 4. I am trying to find a way to legitimately prepend output to indicate the type of output that it is. I am able to do this with something kind of like this... ls -l /tmp/abcdefgh 2> >(sed 's/^/stderr: /') 1> >(sed 's/^/stdout: /') stderr: ls: cannot access /tmp/abcdefgh: No such file or directory ls -l /tmp/ 2> >(sed...
Hi All, I have a service that listens on a socket and handle requests arriving to it and a client loading this service. I want to setup more nodes of the service and use a load balancer to balance the workload. What is , in your opinion and experience, the best open source software load balancer for Linux? Thanks, Ronen, ...
Hello all, Some new opening IT positions require solid LINUX or UNIX knowledge. I would like to know whether or not ubuntu is a good platform to start to learn such skills. Thank you ...
I am an ISP and I need to suspend with a message the clients who didn't pay. For every web page they acces they have to see " suspended " ( port 80 ) and all the other ports need to be closed. How can I accomplish this ? Thanks. ...
We have most of Gnu C Library Headers in /usr/include I'm looking for a way to open and read an include file and parse it to print all the declared functions which are located inside it. and can any one explain or provide a link talking about this headers formatting. I doing this because I'm trying to do an C Auto completion plug-in whic...
I seem to have a huge memory leak in a large Java application. But the leak does not seem to be within the JVM memory itself (ie: heap, eden, survivor, code, perm_gen, etc.) since I don't run out of this type of memory (ie: it goes up during use, but it goes back down eventually when the GC runs). My problem is that I run out of system...
I have been using vim for a couple of years now, and though I have learnt a lot of time saving shortcuts, but I have never used the Visual mode, which is supposed to be all powerful : ... Visual block mode (to edit columns) is something many editors lack, but that I can't live without. I have shocked and awed people at work using jus...