Questions tagged [linux]
NOTICE: All Linux questions must be related to programming; those that aren't will be closed. Use this tag only if your question relates to programming using Linux APIs or Linux-specific behavior, not just because you happen to run your code on Linux. If you need Linux support, you can try https://unix.stackexchange.com or the specific Linux distribution's Stack Exchange site like https://askubuntu.com or https://elementaryos.stackexchange.com/
linux
227,963
questions
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Linux-based solution for domain management?
Using any member of the Windows Server family, I can set up an active directory, and have a single pool of users for a large scale of computers; access can be given / removed for any shared resources ...
- 5,540
6
votes
7
answers
1k
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How to package a Linux binary for my Open Source application?
I have an Open Source app and I currently only post the binary for the Windows build. At this point Linux users have to get the source and compile it. Is there a standard way for posting a Linux ...
- 16.7k
2
votes
8
answers
7k
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What's the best way to keep multiple Linux servers synced?
I have several different locations in a fairly wide area, each with a Linux server storing company data. This data changes every day in different ways at each different location. I need a way to keep ...
- 676
4
votes
2
answers
3k
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Automatically resizing X11 display when connecting an external monitor
I have a laptop running Ubuntu to which I connect an external monitor when I'm at the office. Usually this requires me to run xrandr --auto in order for the laptop to re-size the display to match the ...
- 64k
19
votes
8
answers
22k
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How do I run a command in a loop until I see some string in stdout?
I'm sure there's some trivial one-liner with perl, ruby, bash whatever that would let me run a command in a loop until I observe some string in stdout, then stop. Ideally, I'd like to capture stdout ...
- 69.8k
115
votes
14
answers
228k
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How do you find out which version of GTK+ is installed on Ubuntu?
I need to determine which version of GTK+ is installed on Ubuntu
Man does not seem to help
- 23k
6
votes
5
answers
12k
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Linux commands from Java
Is it possbile to execute linux commands with java? I am trying to create a web servlet to allow ftp users to change their passwords without ssh login access. I would like to execute the next commands:...
- 77.7k
68
votes
10
answers
99k
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Command line program to create website screenshots (on Linux) [closed]
What is a good command line tool to create screenshots of websites on Linux? I need to automatically generate screenshots of websites without human interaction. The only tool that I found was ...
- 4,063
5
votes
5
answers
7k
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Capturing Input in Linux
First, yes I know about this question, but I'm looking for a bit more information that that. I have actually, a fairly similar problem, in that I need to be able to capture input for mouse/keyboard/...
- 2,651
32
votes
15
answers
71k
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extracting text from MS word files in python
for working with MS word files in python, there is python win32 extensions, which can be used in windows. How do I do the same in linux?
Is there any library?
- 2,252
60
votes
10
answers
105k
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Create Word Document using PHP in Linux [closed]
Whats the available solutions for PHP to create word document in linux environment?
TechLearner
10
votes
11
answers
6k
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Problem with Bash output redirection [duplicate]
I was trying to remove all the lines of a file except the last line but the following command did not work, although file.txt is not empty.
$cat file.txt |tail -1 > file.txt
$cat file.txt
Why is ...
Aman Jain
15
votes
4
answers
18k
views
Handling file paths cross platform
Do any C++ GNU standalone classes exist which handle paths cross platform? My applications build on Windows and LInux. Our configuration files refer to another file in a seperate directory. I'd ...
- 3,605
0
votes
4
answers
224
views
For list controls, should find-as-you-type match at the start of an entry, or anywhere in an entry?
I have a list control in GTK+ (a gtk.TreeView with one column), with "find-as-you type" enabled (so typing any text will open a small search field for searching through the list entries). Now, if the ...
- 6,438
22
votes
6
answers
9k
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Why do my keystrokes turn into crazy characters after I dump a bunch of binary data into my terminal?
If I do something like:
$ cat /bin/ls
into my terminal, I understand why I see a bunch of binary data, representing the ls executable. But afterwards, when I get my prompt back, my own keystrokes ...
- 21.8k
23
votes
11
answers
41k
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Used Ctrl-Alt-F6 in Linux, and can't get my screen back
This is obviously a stupid question.
I am coding in Eclipse both on Mac and Linux, but I mixed up and used the Mac shortcut to window tabbing (Ctrl-Cmd-F6), but I was using the Linux on uni and screen ...
- 716
3
votes
3
answers
2k
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What is the best replacement for Windows' rand_s in Linux/POSIX?
The problem is not about randomness itself (we have rand), but in cryptographically secure PRNG. What can be used on Linux, or ideally POSIX? Does NSS have something useful?
Clarification: I know ...
- 18.4k
2
votes
3
answers
1k
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How can you get more information about processes when Linux runs out of memory?
I had recently a problem with oom-killer starting to kill processes after some time. I could see that the memory was consumed, but by the time I got to the server it wasn't clear anymore what consumed ...
- 2,642
0
votes
3
answers
1k
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Manualy choose an interface on TCP to send data
I have a TCP server that is listening on a particular interface only. I want that after the accept() call if the incoming connection was from xxx.xxx.xxx.0 subnet then the data should go through intf1 ...
0
votes
3
answers
2k
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How to route in linux
I have 20 ips from my isp. I have them bound to a router box running centos. What commands, and in what order, do I set up so that the other boxes on my lan, based either on their mac addresses or 192 ...
- 346
75
votes
15
answers
226k
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Specify the from user when sending email using the mail command
Does anyone know how to change the from user when sending email using the mail command? I have looked through the man page and can not see how to do this.
We are running Redhat Linux 5.
- 13.7k
13
votes
3
answers
17k
views
How to set my application's desktop icon for Linux: KDE, Gnome etc?
I have a cross platform program that runs on Windows, Linux and Macintosh. My windows version has an Icon but I don't know how to make have one for my Linux build.
Is there a standard format for KDE, ...
- 16.7k
25
votes
11
answers
15k
views
64
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10
answers
83k
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A way to determine a process's "real" memory usage, i.e. private dirty RSS?
Tools like 'ps' and 'top' report various kinds of memory usages, such as the VM size and the Resident Set Size. However, none of those are the "real" memory usage:
Program code is shared between ...
- 18.8k
4
votes
6
answers
2k
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Best text search engine for integrating with custom web app?
We have a web app that allows users to upload documents, create their own documents, and so on. Uploaded files are stored on Amazon S3, created information is stored in a MySQL database. What I'm ...
- 19.1k
17
votes
7
answers
1k
views
Best practices for withstanding launch day traffic burst
We are working on a website for a client that (for once) is expected to get a fair amount of traffic on day one. There are press releases, people are blogging about it, etc. I am a little concerned ...
- 10.1k
4
votes
12
answers
6k
views
Licensing and using the Linux kernel [closed]
I would like to write my own OS, and would like to temporarily jump over the complicated task of writing the kernel and come back to it later by using the Linux kernel in the mean time. However, I ...
- 9,932
14
votes
20
answers
23k
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How can a C/C++ program put itself into background?
What's the best way for a running C or C++ program that's been launched from the command line to put itself into the background, equivalent to if the user had launched from the unix shell with '&' ...
- 13.6k
8
votes
5
answers
19k
views
Low Java single process thread limit in Red Hat Linux
I'm experiencing an issue on a test machine running Red Hat Linux (kernel version is 2.4.21-37.ELsmp) using Java 1.6 (1.6.0_02 or 1.6.0_04). The problem is, once a certain number of threads are ...
- 110k
3
votes
4
answers
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How to add /usr/share/java libs to webapp's classpath?
Summary
Is that possible for webapps deployed on linux + tomcat5.5 to use/see all /usr/share/java/ jars automatically?
Details
I'm packaging my java webapp for Ubuntu (yet the question is related ...
- 1,488
11
votes
5
answers
16k
views
Reading from a promiscuous network device
I want to write a real-time analysis tool for wireless traffic.
Does anyone know how to read from a promiscuous (or sniffing) device in C?
I know that you need to have root access to do it. I was ...
- 1,043
5
votes
4
answers
4k
views
reinitialize system wide environment variable in linux
I just want my apache to register some of my predefined environment so that i can retrieve it using getenv function in php. How can i do this? I tried adding /etc/profile.d/foo.sh with export FOO=/bar/...
- 4,936
3
votes
8
answers
18k
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Common Causes of Operating System Crashes [closed]
I am interested to learn: what are the most common technical causes (from the perspective of operating system programming) of an operating system crash (not limited to Windows crashes)? I'm looking ...
- 2,756
347
votes
12
answers
598k
views
How to recursively download a folder via FTP on Linux [closed]
I'm trying to ftp a folder using the command line ftp client, but so far I've only been able to use 'get' to get individual files.
- 48.5k
3
votes
1
answer
4k
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How do I run a script when ip-address changes (most likely using a dhclient hook) on a (Ubuntu) Linux machine?
I have a script which contacts a few sources and tell them "the IP-address XXX.XXX.XXX.XXX is my current one". My test web server has a dynamic IP-address through DHCP and amongst other things it ...
-2
votes
2
answers
6k
views
What is the best Linux distribution for Vmware server? [closed]
In terms of Webserver and low package size installation.
shoum
0
votes
3
answers
1k
views
Windows Performance Counter Port to Linux, HP-UX and AIX
We implemented a server application available on Windows only. Now we like to port it to Linux, HP-UX and AIX, too. This application provides internal statistics through performance counters into the ...
36
votes
7
answers
33k
views
How to clear the scrollback in the screen command?
I use the screen command for command-line multitasking in Linux and I set my scrollback buffer length to a very large value. Is there a key combination to clear the buffer for a certain tab when I don'...
Liu Chang
1
vote
2
answers
397
views
Maintaining Multiple Databases Across Several Platforms
What's the best way to maintain a multiple databases across several platforms (Windows, Linux, Mac OS X and Solaris) and keep them in sync with one another? I've tried several different programs and ...
- 1,453
3
votes
9
answers
2k
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Create a small 'window-form' application that runs anywhere
I work in the embedded world, using mainly C and no GUI at all (because there is no display screen).
Moving over to the non-embedded world, in which I have nearly no experience, what is the best ...
- 1,120
243
votes
13
answers
264k
views
Graphical DIFF programs for linux [closed]
I really like Araxis Merge for a graphical DIFF program for the PC. I have no idea what's available for linux, though. We're running SUSE linux on our z800 mainframe.
I'd be most grateful if I could ...
- 2,447
6
votes
2
answers
2k
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MD5 routines that are GLib friendly?
Does anyone know of an MD5/SHA1/etc routine that is easily used with GLib (i.e. you can give it a GIOChannel, etc)?
- 74.4k
0
votes
6
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VMware server 1.0.7 modules incompatible with kernel 2.6.26 -- patched, where to submit?
VMware server 1.0.7 installed with vmware-package
Debian GNU/Linux testing (lenny)
Kernel 2.6.26-1-686
There were several compile problems when trying to build the binary kernel modules from the ...
- 1,790
20
votes
7
answers
16k
views
TCP handshake with SOCK_RAW socket
Ok, I realize this situation is somewhat unusual, but I need to establish a TCP connection (the 3-way handshake) using only raw sockets (in C, in linux) -- i.e. I need to construct the IP headers and ...
- 201
0
votes
7
answers
658
views
Windows Licensing Question [closed]
This is slightly off topic of programming but still has to do with my programming project. I'm writing an app that uses a custom proxy server. I would like to write the server in C# since it would ...
- 32.1k
6
votes
6
answers
7k
views
Programmatically determine video file format?
Ok, I get the basics of video format - there are some container formats and then you have core video/audio formats. I would like to write a web based application that determines what video/audio codec ...
- 61
3
votes
3
answers
1k
views
What is the current state of art in Linux virtualization technology? [closed]
What VM technologies exist for Linux, their pros and cons, and which is recommended for which application?
Since this kind of question can be asked for X other than "VM technologies for Linux", and ...
48
votes
9
answers
58k
views
How can I programmatically manage iptables rules on the fly?
I need to query existing rules, as well as being able to easily add and delete rules. I haven't found any API's for doing this. Is there something that I'm missing?
The closest I've come to a ...
- 1,740
24
votes
11
answers
9k
views
How to simulate memory allocation errors
My C application uses 3rd libraries, which do their own memory management.
In order to be robust, my application has code to deal with failures of library functions due to lack of free memory.
I ...
- 1,157
4
votes
4
answers
2k
views
How do I use (require :PACKAGE) in clisp under Ubuntu Hardy?
I am trying to evaluate the answer provided here, and am getting the error: "A file with name ASDF-INSTALL does not exist" when using clisp:
dsm@localhost:~$ clisp -q
[1]> (require :asdf-install)
...
- 10.3k