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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Custom Tiny Linux LiveCD

I need a very small custrom made distribution that I can use to boot my system (add to boot options of an Ubuntu CD) that will mount the filesystem on disk and make some changes to it (install ...
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2answers
206 views

How to install multiple OS's on a clean HDD

I want to install multiple OS's on my clean harddrive. It will consist of Win 7, Ubuntu, and LinuxMint. I've heard about problems with the boot sequence and such, so is there a standard operating ...
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207 views

Trying to Grep Multiple Phone Numbers Around a Specific Time

I work in at a telecom company and in some cases I need to search for multiple numbers around a specific time. I am using Ubuntu sever 10.04. When I search for a call my normal expression is: grep ...
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2answers
3k views

Redirect stdout to a file when process is run in background

How can I redirect the stdout of a program to a file when it's run in the background? I have a program that generates output every second. When I run it normally and redirect to a file, the output ...
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1answer
796 views

Why are xterm colors different than gnome-terminal colors?

In my work environment I use xterm, and sometimes gnome-terminal. I like gnome terminal, but some of the colors are much harder to read than those of my xterm. I am wondering why the colors ...
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1answer
478 views

Roll back git master repository and branch commits from rollback point

I have a Git repository set up. This repository has almost 700 commits, but all of them is in the master branch. I would like to take an approach in which I roll back this master branch (this rollback ...
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2answers
73 views

different behaviors of vim

On some Linux machines, when I use vim, I can use PageDown, PageUp, Home, End button nicely without any troubles. However on some other machines, these buttons give me funky characters. Why is that, ...
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3answers
4k views

Linux Ubuntu 12.04 high Load without high cpu/ram usage. Which tools and techniques to diagnose/solve this?

I'm having a huge load after install Linux Ubuntu 12.04 My machine now is a Intel G620/4G RAM/ 1T HD, before it was a Amd X2 5000/4G RAM/250G HD Now uptime in idle mode: 12:45:03 up 3 days, ...
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2answers
2k views

RedHat Network - Unable to register

I'm trying to register my RedHat machine to my RedHat Network account but when I try, I get this error: Problem registering system: Error Class Code: 70 Error Class Info: All available ...
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3answers
16k views

RedHat Enterprise Linux 6 - Edit Hostname

I'm currently trying to edit my hostname in a RedHat Enterprise Linux 6 virtual machine but I have some problem. I tried using the function hostname like this: hostname -v bravo.cmweb.com And it ...
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1answer
87 views

What is the equivalent of “nice” for the GPU on *nix machines?

If I have two GPU-intensive processes running, is there a way to "prefer" the load from one over the other, as "nice" does in the *nix kernel scheduler?
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2answers
436 views

How do I find out which program is causing the PC speaker to beep?

How can I trace which program is making the computer beep periodically? Is beeping usually done by writing something to /dev/tty*? How can I monitor which programs are writing to /dev/tty*? The beep ...
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1answer
532 views

Playing sound on server using php

I want to play a sound file on my server using PHP. The PHP script is called by Apache and runs under the user 'nobody', which has by default no access to the speakers. So I created a new user ...
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1answer
79 views

Setting the group of a Unix process

When I run: ps -e -o pid,user,group I see that processes have users and groups (among other properties). How can I as a user influence the group assignment to the processes that I start? In other ...
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2answers
1k views

Linux zram (compcache) + SwapCached

I have a question about zram + swapcached. I know that zram is a compressed swap in memory, but linux use it's own internal SwapCached area to store recent swap pages also in memory. I have a 512MB ...
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6answers
5k views

Port scan revealed port 1111 open. What is it?

I am new to systems administration and have a new server running a website with http (at port 80), https (at port 443) and ssh (at port 22). I did an nmap port scan using my personal laptop and other ...
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3answers
1k views

Wifi scan interval in Debian Wheezy, reconnect after sleep

I want to reconnect to a wireless network as fast as possible when waking up my computer from sleep mode. It always takes a while (usually 15-30 seconds) before there's even a listing of available ...
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1answer
204 views

Sticky Bit and SELinux

I recently got the question how sticky bit and SELinux play together. I only found this one site about Linux Permissions on Fedora Are there any other concerns using sticky bits and SELinux together? ...
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2answers
1k views

Does the Linux 'nice' command work on any shell script?

Does nice work on any shell script, or does it work on basic Linux commands only? For example, if I have a custom shell script that contains a sort function, and I call nice myscript.sh would ...
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1answer
242 views

Get rid of directory of unknown user

I'm constantly failing to do something usefull to a directory. ls gives this output: drwxrwxr-x 2 root 1000 0 19. Jul 14:03 backup Here I'm trying to remove, move or chown this directory ...
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1answer
1k views

Run script after all interfaces were up in Debian

In order to setup a load-balanced permanent routes in debian, according to this article, i have to run the following command ip route add default scope global \ nexthop via 10.100.0.254 dev eth0 ...
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1answer
514 views

linux mount issue with fstab

I'm trying to create a ramdisk inside a VM. I think I have the ability to use tmpfs, because it is Ubuntu 10.04 which comes with kernel > 2.6. I added this to /etc/fstab: none /mnt/test tmpfs ...
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3answers
4k views

How to make differential backup in linux?

I have to write a script to take differential backup (of a directory). Differential backup: A differential backup backs up only the files that changed since the last full back. For example, ...
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3answers
2k views

Is my laptop processor 64bit?

I have a Lenovo Ideapad Y510. I have always used 32bit OS in it. Yesterday I came across this detail of my laptop and it says processor of my laptop is 64bit (hope I have not misinterpret anything) so ...
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1answer
140 views

zgrep not working on the AIX platform

zgrep does not work in AIX and gives the following error ap61cp01> zgrep 9 ap_balance_bucket9_20120718.txt.gz gzip: ap_balance_bucket9_20120718.txt.gz: Permission denied Please let me know the ...
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1answer
33 views

How could I know the file on my local computer is modified or not using linux terminal?

I am trying to get the information about the file modification on my local drive. There are two files in one directory whether one is modified or both the files are modified I dont know ? I wanted to ...
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1answer
452 views

What are the recommended runlevels for httpd?

I am deploying an httpd server on RHEL6. I've installed the rpm and everything. Now, when it comes to service startup, most of the post give as example the following line: chkconfig --levels 235 ...
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1answer
988 views

Linux Mint 13 is not booting on dual boot computer

I have 2 hard drives in my computer a 300 GB drive which is my primary drive for windows 7 and a 1.5 TB drive that I'd used for storage. When I got it I partitioned 500 GB for use in Linux. So, I ...
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2answers
85 views

Use all CPUs when creating archives on Linux

Today I wanted to create a backup from a folder on a server with 16 CPUs. I started looking for an option that can utilize my hardware to archive a folder better than how tar does it. Something with ...
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1answer
264 views

Ubuntu to Debian, pulseaudio works differently

Simple case: one application and one output device. I'm also using pavucontrol. In Ubuntu, I could change the volume of the application or the output device without affecting the other's volume. ...
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1answer
1k views

Uefi Grub booting to Windows XP hangs at black screen

I had a working system that booted xp and linux just fine from grub2. I changed systemboards to one that has uefi and now xp hangs unless i use f11 and boot directly to the drive with xp in the mbr ...
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2answers
748 views

Is there anyway to send and receive email in linux command using POP3?

New to mail in linux command line, I don't know it support POP3 protocal or not which icloud mail service using? Is there a more handy command line mail clinet than mail?
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2answers
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How do I switch between graphics cards without turning off the computer?

I'm running Ubuntu 12.04 and I've got an NVIDIA graphics card that is currently active. I'd like to switch to using the graphics card on the motherboard without turning off the computer. Is this ...
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2answers
654 views

How to make your ubuntu filesystem read-only

I wonder whether there is a way to make my ubuntu read-only when I mount it on another linux system. Let me clear what I want. I have a usb stick on where my ubuntu is installed. However, the problem ...
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3answers
218 views

How could I pack my linux installation to installable DVD

I have spend more than 2 months configuring my openSUSE 12.1 linux as ultimate development environment with manual installs of many tools and packages. How could I pack this as my own distro on a DVD ...
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4answers
146 views

In linux how do I do multiple operations on a single string through piping?

For example, If you do free -m | sed -n 2p I want to work with the output from the last, second to last, and third columns. The problem is I want to keep it consistent and use the output from free ...
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1answer
74 views

Windows 7 installation removing fedora17

Currently I have Fedora 17 installed on my system. For some Windows specific tasks I need to use Windows, so I want to install Windows 7 on my system. All of the partitions on my harddrive are ...
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0answers
551 views

How do I set the primary display on rhel 6 with dual displays

I've got a lenovo T410 laptop running RHEL 6.3. When I plug it into my docking station I've got it setup to do dual display, but it insists on using the laptop as the primary display keeping the ...
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1answer
178 views

Dual Boot - OS on Workstation with 6 TB (4 Independent HD's) [closed]

I have a great high end HP Workstation with 6-TB (4 Independent HD's) I would like to add the latest Linux os desktop and Ubuntu 12.04 - in addition to the 2 Windows 7 OSs I have, and if possible to ...
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1answer
507 views

How to Unzip files recursively in Linux / DOS

I have a zipped folder which contains thousands of zipped folders contained in itself and that goes down the hierarchy, I have to unzip each and every file and place it in a single folder. This task ...
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1answer
684 views

Run parallel awk commands on a large file, no extra file space

I'm trying to process a fairly large tab-separated file (~30GB). I can run awk to rearrange the columns, but it only uses a single core of my 8 core machine. How can I use all the cores? (and ...
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1answer
2k views

How do I remotely fetch files from redirected URLs from a terminal?

I want to fetch a tarball of this python library from terminal. https://github.com/simplegeo/python-oauth2/downloads However, I cannot simply call wget ...
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3answers
563 views

What can cause Linux installation via USB to fail on modern nettop?

I have a freshly unboxed Lenovo Ideacentre Q180, it ships with FreeDos so I'm trying to install Linux (XBMCbuntu ideally, but any distro will do for now). I have used UNetbootin to make a bootable ...
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3answers
2k views

Character Map in linux?

Windows has a character map utility. Is there one in Linux? I'm using KDE; but I'm sure that doesn't matter.
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0answers
388 views

Making grub boot into chroot directory

I am trying to make grub boot into a chroot directory /slack containing a Slackware Linux installation. This directory was created by issuing the following command: installpkg --root /slack a/*.t?z ...
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0answers
35 views

how do i transcode MTS files with highest quality? [duplicate]

Possible Duplicate: Encode HD video to a good format for editing I've tried trancoding into mpeg2 @25Mbps but the video looses quality. perhaps my ffmpeg command is to blame for file in ...
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2answers
500 views

Copy all files from a directory tree into one directory

I'm running on Windows but have Cygwin so Windows or simple Linux versions are both OK. My camera-phone stores images in a directory tree based on date, but still appears to name each file uniquely. ...
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2answers
2k views

fstab on boot: mount when device is plugged in

I have an external USB drive which I want to be mounted automatically on boot when it is plugged in. With the current settings in fstab, mount will try to mount it even when it is not available, which ...
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2answers
838 views

Transfer Skype chat history to Fedora 17 from Windows 7

I want to copy my Skype chat history from Windows 7 to Fedora 17. Is this possible? I have found the Skype chat history in Windows 7 at the following: ...
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1answer
3k views

how to find out client ip address and client process id which connected server's specify socket

for example: our linux license server deomon is on "5280@192.168.22.1". we have many client linux to connect 5280 on 192.168.22.1. I want to find out which client process id connect ...