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

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How to reduce lag on a server?

I have an application client that connects to our server. Our customers download it and use, but some of them are getting bad lag spikes. Server seems to be running pretty fine, but the problem ...
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1answer
1k views

End Process vs End Process Tree

What is the primary difference between the two? I always see this in the right click menu in windows. What happens if you end a process that is relied upon by another process? Is there a way to "kill" ...
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2answers
49 views

Toggle individual monitors on a GNU/Linux laptop

I have an external monitor connected to my laptop. When for example watching video on my external screen, I would like to have the option of easily turning off or dimming the laptop screen. But I ...
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1answer
34 views

Linux command for creating/leaving/returning to shells

I was using a command a long time ago to manage my background processes and I can't remember wich one. I had to install it. I could create a shell and go into it Run a process Leave the shell with ...
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3answers
2k views

How to pipe data over tcp from the command line?

I would like to pipe data from one machine in the command line to another machine over tcp. I guess I could write a socket server but this must already be implemented. For example I could use it to xz ...
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2answers
6k views

What are the disadvantages of not using UEFI boot?

I bought a Samsung series 9 laptop with 64-bit Windows 8 pre-installed and wish to install Linux (probably Ubuntu 13.04 when it comes out ext week, but also considering mint 14). Now there have been ...
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0answers
177 views

Linux GeForce GTX driver is underreporting RAM and underperforming in general

I have just installed Kubuntu 12.04 on an Alienware M17x R4. It has Intel integrated graphics and a GeForce GTX 660M. #> sudo apt-add-repository ppa:ubuntu-x-swat/x-updates #> sudo apt-get ...
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1answer
280 views

Forgot su password at virtual machine?

I'm new to Fedora-17 and Linux. I've stumbled upon a problem after created my su password; I added some sequence and after this see prompt Setup is complete! But generally I didn't remember this ...
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1answer
285 views

Is it possible to use grub2 with a linux root partition under Soft-RAID5?

I need some more space in my computer, therefore I want some basic changes be done. One of those is setting a RAID up for all files to be a bit more robust (I have just had a hd crash, so I am a bit ...
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0answers
173 views

Tell yum update to given date, no later

I need to tell yum to update to a certain date's patches. For instance, let's say a test box gets updated last Thursday. The owner beats on the machine and determines the patch set is good, so I want ...
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1answer
299 views

Sony Vaio VPCCA3S1E debian installation can't find ethernet driver

I'm trying to install Debian 6.0.7 to my Sony Vaio VPCCA3S1E laptop from USB flash disk via netinst but the installer can't find driver for my ethernet card so it can't download the installation ...
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1answer
529 views

how to run a program with root privilege in a remote linux host

I want to run a program on many remote hosts these program may run serveral hours and it needs root privilege I have uploaded the program to those remote hosts I can only ssh into those machines ...
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0answers
195 views

Cron job not working due to wget error

I'm setting up a CRON job on my MediaTemple DV4 to generate a sitemap. To test I ran the command via the command line: wget ...
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1answer
218 views

Cannot reach specific public IP

My server (runs on Ubuntu 12.04) is behind a NAT and has to access a specific service that has a public IP address (64.*.*.*). The problem is that I cannot reach that specific public IP (all other ...
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1answer
423 views

dpkg : dependency problems - leaving unconfigured

I have a problem with Emacs on my Linux Mint. When I make an apt-get upgrade or apt-get -f install, I have this error message : Paramétrage de emacsen-common (2.0.3) ... ...
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2answers
26 views

Forwarding of root URL only?

I have a domain and I would like and visits to the root of the domain only to be forwarded. For example: www.domain.com -> www.domain.com/holding However www.domain.com/home ...
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1answer
994 views

using iptables to prevent RST related to a specific port

I have a program which uses libpcap to capture incoming TCP SYN packets, these SYN packets are destined for a specific port. But I have no tcp listening socket for that port, so in practice, the OS ...
4
votes
2answers
2k views

How to persist bash history?

I don't know if this is expected, but my history is not saved across sessions. This is to say, if I close the window, then when I open it again, the history is empty. How can I persist it across ...
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0answers
122 views

USB/SD transfer speed for concurrent writing of multiple files on Linux

I need to transfer more than one big file on USB or SD device, let's say 4 files of 1 GB each. I noticed that on USB, the concurrent transfer of multiple files is way slower than queuing up the copy; ...
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3answers
4k views

extract string from file using shell script or awk

i have txt file that contains some website.i'd like to extract websites how can i do this? xhr_object.open("GET",filename,false ); <li><a href="http://www.dakar.com" ...
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1answer
420 views

Howto create a bootable pendrive for windows manually on Linux? [duplicate]

I've been trying around but am not through yet. Where is my procedure failing? I have a 2G usb disk which I prepare the following way: 1 - Make a partition with fdisk yielding /dev/sdb1 2 - mkfs.ntfs ...
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0answers
106 views

Using Courier Imap to deliver Getmail Folder

I am running ubuntu and I have a script that runs getmail and pulls mail from 10 different mailboxes by imap and places in a folder called ~/allmail. I have then changed the maildir in courier to ...
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1answer
6k views

How to find which ports are blocked?

I have root on two machines A and B and I would like to know which ports can't be accessed on B from A. Is there some way to run a command line application on B that listens on all ports and then run ...
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2answers
689 views

Is it possible to mount a swap partition into a directory?

I want to have a look inside the swap partition of an external linux drive. How can I mount it as a regular file system directory? I tried mounting it via mount -o loop,offset=35556433920 -t ...
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2answers
106 views

How to access data card firmware through Linux?

I have a useless data card lying around. Huwaei EC 122. I want to play around with it. See what's inside etc. However, I don't know how to access the firmware on the data card already. There are a ...
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2answers
155 views

Why does my ssh session terminate immediately?

I have a debian machine, where I have difficulties to log into via ssh. Executing commands on the server over ssh is no problem -- just I get no prompt, but the connection is terminated again: > ...
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2answers
139 views

Vnc and ssh tunnelling not working

I am trying to access my work computer (server C) via vnc. I have root on this machine. I can't access it directly so I have to go via server B. I have done the following steps. First on my local ...
2
votes
1answer
302 views

94% Memory usage on Host OS using VirtualBox

I'm running a 32 bit Windows 7 Guest on a 64 bit install of VirtualBox 4.2.10 r84104. The Host OS is Ubuntu 12.10 64 bit. The host os has 8GB of memory and the guest is told to utilize 2GB max. ...
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votes
1answer
217 views

Copy all files from one place to another whilst keeping group permissions

I'm trying to copy files from one place to another, I am using this: cp -R /from/ /to/ However, whilst this is keeping the standard permissions, it is setting the group permissions to 0 0 ...
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3answers
95 views

What types of users can I use with “sudo”?

I thought you could only use sudo to temporarily become root: sudo vim /etc/resolv.conf But recently I saw a shell snippet depicting a user using sudo to become a specific user: sudo -H -u devops ...
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1answer
406 views

Detect HTTP sessions using tcpdump [closed]

I have a tracefile and I want to find all web servers that were successfully visited in the trace, contacted via HTTP. I'm using: tcpdump -r file.trace - tcp port 80 Maybe I have to search for a ...
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2answers
3k views

How to install 2X Client on 64-bit ubuntu?

Installed it with .deb from 2X website. Now got: > /opt/2X/Client/bin/2XClient: error while loading shared libraries: libXpm.so.4: cannot open shared object file: No such file or directory I ...
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1answer
200 views

VMware: Best way to assign static IP and DNS entries for guest machines?

I'm looking for a scriptable solution for assigning a static IP address and DNS entries for VMware guest machines. There is a pool of IP addresses we allocate for internal use, so I need to be able to ...
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1answer
151 views

Trying to access MySQL Database on Linux Guest from Host

I am trying to access MySQL Database on Linux Guest from Host and I am getting the following error: ERROR 2003 (HY000): Can't connect to MySQL server on 'REGAN' (111) I already setup port forward ...
5
votes
1answer
2k views

Customise Okular to modify highlight tool properties

I am using Okular as my pdf reader on Linux. I want to know how I can modify the color of the highlight permanently. I know I can modify the saturation of the color used by highlight tool by right ...
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0answers
106 views

android emulator hardware acceleration on i5-2500K

I just wanted to know if anyone have managed to start the android emulator with the "Use Host GPU" option checked on the i5-2500K buildin gpu using linux. Each time i start it with "Use Host GPU" i ...
2
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1answer
259 views

copied chroot jail directory cant be chrooted

I am developing a package so when users login through ssh they are forwarded to a chroot jail. The jail directory is created via makejail program on building process. But when the jail package copy ...
1
vote
1answer
57 views

Booting an encrypted system from a flash drive without user interaction

I have an unused desktop that I'm planning on turning to a household server running (hopefully) Arch Linux. I know that I can fully encrypt the system and have to enter a password upon each boot but I ...
3
votes
4answers
805 views

Running sshfs as user via autofs

My situation: There are several servers on my LAN which I do not administer I access them using SSH for sshfs, shells, and remote X11 apps I have set ControlMaster auto in my ~/.ssh/config file so I ...
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0answers
623 views

mpeg_decode_postinit() failure [closed]

I'm trying to take some thumbnails via ffmpeg command. My file name is "aaa.ts" and I want to take some thumbnails every second. Frankly, it works, but I have 4 red lines in terminal. So can you tell ...
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0answers
119 views

How do I change the output monitor for a text console in Linux / Ubuntu 12.10?

I'm working with an nVidia card and multiple monitors, and the monitor that is used by default for text mode is in portrait mode, forcing me to crane my head to the side to use it when I switch to a ...
2
votes
0answers
169 views

Linux bootloader on USB-stick, load different kernel depending on hardware

I'm experimenting with a setup where I keep my kernel and initrd on a USB stick, and thus I can keep everything on the actual computers fully encrypted. Nothing is stored in clear text, and nothing ...
1
vote
1answer
419 views

Linux, Debian, Wheezy, Aptitude/DPKG consistency check

In a foolhardy and stupid attempt to solve space issues on my desktop machine, I on purpose deleted Spotify from /opt before realizing that I could remove it using the package manager. After deleting ...
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1answer
3k views

Installing wireless Broadcom drivers on Arch Linux

So how do I accomplish this last step to this journey? I already installed Xfce even, thanks to Ethernet I was able to. However I still need to figure out the wireless drivers. I've already tried ...
0
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1answer
160 views

Dropbox on Linux Mint permissions issue

I have been developing a python package in dropbox. DB seems to be causing a very strange permissions issue. I own and have RW permissions to the directory and all of it's contents. Yet, when I try to ...
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2answers
40 views

Difference in Logs

Is there a utility that will show you a difference in a directory of log files at one point of time and at the current moment? Current a method in debugging applications is to remove all of the logs ...
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1answer
110 views

Xerox D95 support on linux?

I failed to find any official or unofficial driver for this printer. Usually for my brother and canon printers i can get away by using a close model (e.g. using the driver for DCP-8060 to print on a ...
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0answers
555 views

How to only add lines using patch?

I'd like to be able to use diff & patch in order to write new lines to a file. To clarify what I mean a bit: Original file: test1.repo exclude=mongo* exclude=sqlite* ...
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2answers
473 views

Get list of distinct file endings in a directory (UNIX shell)

I have a directory with many image files in different formats. I'd like to see a list of all distinct file endings in that directory, so that I can see what kind of image formats are present. So ...
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2answers
2k views

How can I clean HOME folder in linux?

There is a way to clean in a controlled way the $HOME folders than usually save cache files? E.g: I have a .config folder with more than 300MB. How can I clean it?. Is there a program that can be ...