A family of Unix-like operating systems using the Linux kernel. If your question is about a certain distribution only, use a more specific tag.

learn more… | top users | synonyms

9
votes
4answers
1k views

Unix tools: what if a file is named minus something?

I'm always wondering: most GNU/Unix tools take options in the form "minus something", sometimes followed by an argument. What if you got a file named minus something? $ ls -f $ rm -f $ ls -f $ mv -f ...
8
votes
3answers
8k views

Adjust screen brightness automatically at night

Can anyone tell me how to automatically dim my monitors when it gets dark at night?
7
votes
4answers
5k views

Why do we need to set swap space as twice big as our physical memory?

When we want to setup a linux system, there is a common a suggestion to set the swap space twice as big as your physical memory. I want to know why do we need this, and how it is this suggestion come ...
6
votes
3answers
1k views

How can I receive phone calls on a Linux server and script stuff depending on the numbers pressed?

I live in France and the ISP I've subscribed to provides a regular phone line along with my Internet connection. Here's a simple schema of my setup: Since I don't use this phone line I would like ...
4
votes
3answers
433 views

what does crypt(3) and whatnot mean [duplicate]

Possible Duplicate: What do the parentheses and number after a Linux command or C function mean? In Linux Manpages (http://linux.die.net/man/3/crypt) I often see sth like this: crypt(3), ...
12
votes
4answers
8k views

Linux Group Permissions not being enforced correctly.

I am running Ubuntu 10.04 server and am having some very counter-intuitive experiences with users/groups. For example: sudo touch test_file # create empty file sudo groupadd test ...
10
votes
6answers
3k views

What is the difference between Unix and Linux? [duplicate]

I want to know what the actual difference between Unix and Linux is. Do they share the same kernel? Is Linux built on Unix? Do programs written for Linux work on Unix and vice-versa?
5
votes
1answer
1k views

Deleting another user's directories from my own

I am a non-root user, and have made a directory into which other users in my group can write. The directory is setgid, so files and directories within it have the same group. I can delete files ...
4
votes
2answers
1k views

Running Linux on Old PC [duplicate]

Possible Duplicate: Lightweight GUI Linux distribution for really old computer I have an old PC with 196MB RAM, 20GB HDD, 466MHz Intel Celeron processor. I want this PC to run 24/7 for ...
4
votes
4answers
1k views

Linux distributions comparison

Does any good comparison exist (like a table of present features) between the many Linux distributions? What are the features and advantages on each distribution? (Ubuntu, Fedora, CentOS, etc.) ...
3
votes
2answers
800 views

Minimal emacs24 installation on ubuntu

I need a minimal emacs 24 installation for distribution in a virtual box. When I try to install emacs-snapshot from synaptics I get tons of stuff installed like ghostscript and imagemagic and various ...
3
votes
1answer
1k views

ssh terminal session times out, how can this be changed

It seems after about 5 minutes an inactive ssh session is terminated. The server is Ubuntu. How can I change this?
2
votes
3answers
366 views

No GRUB after re-installing Windows

I have Windows and I installed Fedora 12 on a separate partition. However, I had a problem with my windows XP SP 3 and had to install Windows on my C drive. When I re-boot I on longer get the GRUB ...
2
votes
1answer
2k views

Java install on Ubuntu?

i'm new to linux and i was trying to install the java JDK with EE on ubuntu. I downloaded the .bin file (java_ ee_ sdk-5_08-jdk-6u17-linux.bin) from the sun site & followed the install ...
1
vote
1answer
337 views

How can I start a process over SSH such that it will continue to run after I disconnect?

XBMC occasionally crashes on my media server. It's a pain to bring down the media server because I have to manually restart a number of services each time. I'd like to be ablle to start XBMC from an ...
0
votes
2answers
338 views

How to execute a compiled C program in Linux terminal

#include<stdio.h> main() { int a,b,c; printf("enter the value of a and b for addition:\n"); scanf("%d %d",&a,&b); c=a+b; printf("Addition of ...
0
votes
1answer
1k views

Unable to access localhost & Internet using one adapter in CentOs

I have the below dev. environment. Hardware:- Windows 7, 32bit, HP Laptop. Software:- CentOs 6.5 running on VirtualBox 4.3.10. In a nutshell The problem is that I can't access the internet and ...
0
votes
3answers
192 views

Dual boot Linux with Windows 7

I am trying to recover an installation of Linux on my machine, preferably without having to reinstall Linux (and possibly Windows) altogether. I have installed Pear OS first, and then installed ...
0
votes
2answers
414 views

How To Get Windows To Stop Assuming Precedence Over GRUB?

I have a SATA hard drive with an MS DOS MBR partition table, an ext4 Linux-based OS, an NTFS Windows 7, and an extended partition. I was happily using my ext4 partition for quite some time, but grew ...
0
votes
4answers
5k views

Create a Windows XP user from a linux partition

Long story short, someone repaired my brother's computer and set a password on his account, now we can't get in and can't contact the person who set the password. Is it possible to create a Windows ...
0
votes
1answer
900 views

Two networks cannot be accessed simultaneously

I have two networks on a server. One being my internal network, and the other being an external IP address. This is on Debian Lenny. Here is my /etc/network/interfaces file: auto eth0 iface eth0 inet ...
0
votes
4answers
303 views

Share internet in Linux

I have an 3.5G USB Modem that I want to share its internet connection in Linux. I tried already, but only got having no internet on my own PC, still without sharing it. It's really hard to find some ...
0
votes
2answers
6k views

Firefox displays garbage characters in lieu of web page

On this web page http://taj.chass.ncsu.edu/Hindi.Less.05/dialog_script.html, firefox and opera running on windows and linux display the source html interspersed with garbage characters (for me, they ...
96
votes
15answers
159k views

How to wipe free disk space in Linux?

When a file is deleted, its contents may still be left in the filesystem, unless explicitly overwritten with something else. The wipe command can securely erase files, but does not seem to allow ...
160
votes
3answers
152k views

Go back to previous directory in shell

Is there a way to go back to previous directory we were in using bash,tcsh without using pushd/popd ? I'd like to type something like "back" and got returned to the previous directory I was in. Edit: ...
110
votes
13answers
71k views

How to reliably keep an SSH tunnel open?

I use an SSH tunnel from work to go around various idotic firewalls (it's ok with my boss :)). The problem is, after a while the ssh connection usually hangs, and the tunnel is broken. If I could at ...
100
votes
2answers
123k views

How to convert .ppk key to OpenSSH key under Linux?

I know that is possible to convert .ppk under puttygen in Windows, but how to do that on Linux? Is this possible ?
103
votes
14answers
255k views

How do I figure out which /dev is a USB flash drive?

I want to mount a USB drive, two of them and I need two different mount points. Unfortunately, the Linux kernel underwent a name change and I can't figure out which /dev location is the right one. Is ...
33
votes
5answers
127k views

How to reinstall GRUB2 EFI?

After successfully updating my bios, something went wrong and I ended up with a blinking cursor on the top left corner of a black screen. No errors, no nothing. The bios now only listed a SATA: ...
105
votes
2answers
26k views

How to append to a file as sudo? [duplicate]

Possible Duplicate: sudo unable to write to /etc/profile I want to do: echo "something" >> /etc/config_file But, since only the root user has write permission to this file, I can't ...
65
votes
12answers
87k views

Unix/Linux find and sort by date modified

How can I do a simple find which would order the results by most recently modified? Here is the current find I am using (I am doing a shell escape in PHP, so that is the reasoning for the variables): ...
83
votes
2answers
184k views

How do I get Java support on Google Chrome in Linux?

Is there a way to run Linux Google Chrome with Java support?
59
votes
12answers
68k views

How to start GUI linux programs from the command line, but separate from the command line?

I've searched for this before, but have never been able to find an answer. In Windows, if I have a console window open, type winmine, and press enter, Minesweeper will appear, completely separate ...
59
votes
4answers
115k views

Linux: find out what process is using all the RAM?

Before actually asking, just to be clear: yes, I know about disk cache, and no, it is not my case :) Sorry, for this preamble :) I'm using CentOS 5. Every application in the system is swapping ...
36
votes
6answers
25k views

How can I diff two XML files?

On Linux, how could I generate a diff between two XML files? Ideally, I would like to be able configure it to some things strict, or loosen some things, like whitespace, or attribute order. I'll ...
29
votes
9answers
79k views

How to convert Word (doc) to PDF in linux?

I have a set of files in .doc format, that need to be converted to .pdf format. I am using Ubuntu linux.
47
votes
1answer
10k views

If I buy a computer with Windows 8 and Secure Boot, will I still be able to install Linux?

I've heard a lot about how Microsoft is implementing UEFI Secure Boot in Windows 8. Apparently it prevents "unauthorized" bootloaders from running on the computer, to prevent malware. There's a ...
45
votes
7answers
73k views

How to list folders using bash commands?

Is there any way to list just the folders in a directory using bash commands? ( as the ls command lists all the files and folders )
31
votes
5answers
49k views

Good block size for disk-cloning with diskdump (dd)

I use dd in its simplest form to clone a hard drive: dd if=INPUT of=OUTPUT However, I read in the manpage that dd knows a blocksize parameter. Is there an optimal value for the blocksize parameter ...
18
votes
1answer
10k views

Making 256-color AND Line drawing characters both work in PuTTY

I'm having trouble setting up PuTTY with Ubuntu. I'm trying to get line characters to work in aptitude as well as 256-color support, but can only get one or the other. Ubuntu Config Using 64-bit ...
46
votes
11answers
18k views

What is the relationship between Unix, Linux, Ubuntu, Debian and Android?

What is the relationship between Unix, Linux, Ubuntu, and Debian? I suspect they are all Operating Systems that are based upon one another - similar to how Windows is based on DOS. Is my suspicion ...
30
votes
2answers
99k views

Creating ext4 partition from console

I have a volume /dev/sda1 (1.2 TB) containing an NTFS partition using 0.6 TB space. I want to make an ext4 partition in the remaining 0.6 TB space. I have not tried anything yet because I don't want ...
29
votes
4answers
4k views

Windows vs Linux Local Time?

Ever since I started using Linux in dualboot with Windows I noticed that when I rebooted the machine, the time on the other OS was wrong, e.g. it was 12:00 on Linux, then I rebooted and on Windows it ...
49
votes
7answers
44k views

How to throttle bandwidth on a Linux network interface?

Is there a way to constrain the bandwidth on a NIC in linux? I'd like to be able to simulate an arbitrarily slow connection.
34
votes
1answer
39k views

Show only current directory name (not full path) on bash prompt

The way my bash prompt is currently configured, it shows the whole path to the current directory. This is annoying when I'm deep inside a directory tree, as the prompt becomes so long that every ...
20
votes
5answers
55k views

What is the meaning of “chmod 666”?

I am using Linux. What is the meaning of chmod 666?
16
votes
3answers
17k views

How to create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG

How can I create an uncompressed AVI from a series of 1000's of PNG images using FFMPEG? I used this command to convert an input.avi file to a series of PNG frames: ffmpeg -y -i input.avi -an ...
37
votes
2answers
14k views

What's the difference between “su” with and without hyphen?

I'm quite new to Linux terminal and I'm not quite sure what the difference between su with a hyphen and su without a hyphen is, for example: su - username vs. su username. I looked into the ...
23
votes
4answers
26k views

Can I hibernate Linux without a swap partition?

I hadn't set up a swap partition on my PC, because a) I have plenty of RAM (8 GB) and b) I have large harddrives that I didn't want to chop into tiny pieces, so my smallest partitions are 50 GiB, and ...
31
votes
8answers
33k views

How to know which Linux Distribution I'm using?

How to know which Linux Distribution I'm using? uname -a gives Linux xxxxxx.net 2.6.9-42.0.3.EL.wh1smp #1 SMP Fri Aug 14 15:48:17 MDT 2009 i686 i686 i386 GNU/Linux How can I know this is ...