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• How do you find the age of a long-running Linux process?

  - by yukondude

  I have a problem with some zombie-like processes on a certain server that need to be killed every now and then. How can I best identify the ones that have run for longer than an hour or so?

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• How to query the video ram size of a ATI card on Linux?

  - by Patrick Bao

  I want to know the physical video ram size in my application. I can get the same information of Nvidia card by using "nvidia-settings -q -t VideoRam". I can use amdcccle to find this information, but it's an GUI app, so can't be used in my application. I wonder if there is a way to get this by command, function, or config file? I'm using RHEL…

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• How to debug problems in Linux kernel module `init()`?

  - by Kimvais

  I am using remote (k)gdb to debug a problem in a module that causes a panic when loaded e.g. when init() is called. The stack trace just shows that do_one_initcall(mod->init) causes the crash. In order to get the symbol file loaded in the gdb, I need to get the address of the module text section, and to get that I need to get the module…

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• How would you build a "pixel perfect" GUI on Linux?

  - by splicer

  I'd like build a GUI where every single pixel is under my control (i.e. not using the standard widgets that something like GTK+ provides). Renoise is a good example of what I'm looking to produce. Is getting down to the Xlib or XCB level the best way to go, or is it possible to achieve this with higher level frameworks like GTK+ (maybe…

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• Using cp command in linux shell, how do I copy a whole directory into another directory?

  - by Dmitry Supranovich

  I have a directory, let's say, "work": ~/work/ This directory has some sub-folders (d1, d2...) in it and files in these sub-folders. I want to make a backup copy in the same folder, so it would be like: ~/backup/work/ However, when I use cp -r ./work ./backup the folder "work" is not copied, only its subfoders (so now it's ~/backup/d1…

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• Is downloading and using XCode on linux consistent with Apple's license?

  - by George Edison

  Am I allowed to do this? I am planning to do some cross-compiling and I was wondering if this was permitted.

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• How to solve High Load average issue in Linux systems?

  - by RoCkStUnNeRs

  The following is the different load with cpu time in different time limit . The below output has parsed from the top command. TIME LOAD US SY NICE ID WA HI SI ST 12:02:27 208.28 4.2%us 1.0%sy 0.2%ni 93.9%id 0.7%wa 0.0%hi 0.0%si 0.0%st 12:23:22 195.48 4.2%us 1.0%sy 0.2%ni 93.9%id 0.7%wa 0.0%hi …

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• How to find the physical address of a variable from user-space in Linux?

  - by Sandip

  I want to find the physical address of a variable defined in a user-space process? Is there any way to do it using root privileges?

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• Is this a good starting point for iptables in Linux?

  - by sbrattla

  Hi, I'm new to iptables, and i've been trying to put together a firewall which purpose is to protect a web server. The below rules are the ones i've put together so far, and i would like to hear if the rules makes sense - and wether i've left out anything essential? In addition to port 80, i also need to have port 3306 (mysql) and…

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• What are the first operations that the Linux Kernel executes on boot?

  - by The Rook

  After the boot loader hands execution over to the kernel, what happens? I know assembler, so what are the first few executions that a kernel must make or is there a C function that does this? What is the startup sequence before the kernel can execute an arbitrary binary?

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• Is there any way to get the combine two xml into one xml in Linux.

  - by Tattat

  XML one is something like that: <dict> <key>2</key> <array> <string>A</string> <string>B</string> </array> <key>3</key> <array> <string>C</string> <string>D</string> …

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• Can anyone recommend a command line virus scanner that is open source and works with linux/php/apach

  - by Scarface

  Hey guys recently I have had the 'priveledge' of trying to set up an anti virus scanner to scan file uploads to my VPN server. I just finished trying to set up ClamAV but it slowed my server down to a hault once initiated so I had to kill it. Does anyone have any recommendations to a program that will accomplish my task…

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• What to use to check html links in large project, on Linux?

  - by depesz

  I have directory with 1000 .html files, and would like to check all of them for bad links - preferably using console. Any tool you can recommend for such task?

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• How do I strip local symbols from linux kernel module without breaking it?

  - by Kimvais

  If I do --strip-debug or --strip-unneeded, I have the .ko that lists all function names with nm, if I do just strip foo.ko I have a kernel module that refuses to load. Does anyone know a quick shortcut how to remove all symbols that are not needed for module loading so that people cannot reverse engineer the API:s as…

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• Linux C++: how to profile time wasted due to cache misses?

  - by anon

  I know that I can use gprof to benchmark my code. However, I have this problem -- I have a smart pointer that has an extra level of indirection (think of it as a proxy object). As a result, I have this extra layer that effects pretty much all functions, and screws with caching. Is there a way to measure the time my…

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• What the best approach to iterate and "store" files over a directory in C (Linux) ?

  - by Andrei Ciobanu

  I have written a function that checks if to files are duplicates or not. This function signature is: int check_dup_memmap(char *f1_name, char *f2_name) It returns: (-1) - If something went wrong; (0) - If the two files are similar; (+1) - If the two files are different; The next step is to write a function…

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• Linux: is here a read or recv from socket with timeout?

  - by osgx

  Hello How can I try to read data from socket with timeout? I know, select, pselect, poll, has a timeout field, but using of them disables "tcp fast-path" in tcp reno stack. The only idea I have is to use recv(fd, ..., MSG_DONTWAIT) in a loop

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• What is the best form for get the home directory on Windows and Linux from a PHP Script?

  - by Castro

  I need something like: get_home_user($username)

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• best approah (security) to do some admin work through web page in Linux?

  - by Data-Base

  Hello, I want to build a web based admin tools that allow the system admin to run pre-configured commands and scripts through a web page (simple and limited webmin), what is the best approach? I already started with Ubuntu installing LAMP and give the user www-data root's privileges !!! as I learned (please…

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• Can someone illustrate what's linux device number's minor number exactly for?

  - by httpinterpret

  The minor number is used by the kernel to determine exactly which device is being referred to. The above explanation is just two abstract, can someone illustrate?

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• In a Linux user space process what is the address of the vsyscall page?

  - by TomMD

  I would like to acquire the address of the vsyscall page for my own uses. I only have two ideas here: alter the compiler to store this information in some known location after it is given to __start, or read /proc/[pid]/maps. I really don't want to read /proc/ as that is slow and shouldn't be necessary. I…

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• Linux shell to restrict sftp users to their home directories?

  - by hfidgen

  I need to give SFTP access to a directory within my webroot on my server. I've set up ben_files as a user and have set his/her home directory to /var/www/vhosts/mydomain.com/files That's all fine if he/she connects with plain old FTP - he's/she's restricted just to that directory, but to enable SFTP I…

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• Which technology(s) / language(s) to write linux web application/service? [closed]

  - by Lee Tickett

  I am currently playing with some open source home automation software www.domotiga.nl The software is built in Gambas2 (a graphical programming language similar to visual basic). I am considering building something similar or porting domotiga to a server based application/service. The application would…

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• How to check if a process is running or got segfaulted or terminated in linux from its pid in my mai

  - by rkbang

  Hello all, I am invoking several processes in my main and I can get the pid of that processes. Now I want to wait until all this processes have been finished and then clear the shared memory block from my parent process. Also if any of the process not finished and segfaulted I want to kill that process.…

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• Linux server, locating files containing nothing but 4 specific lines.

  - by Denis

  Hi, I'm dealing with a compromised website, in which hackers injected an htaccess instruction to redirect traffic. I can easily locate .htaccess files that contain the forwarding hack, BUT in cases where the directory already contained an htaccess file, they appended the dangerous instructions, so I…

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