Questions specifically about Linux, as opposed to Unix-like systems in general, or to questions about a specific distribution or program.

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5
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0answers
191 views

GNU/Linux swapping blocks system

I have used GNU/Linux on systems from 4 MB RAM to 512 GB RAM. When they start swapping, most of the time you can still log in and kill off the offending process - you just have to be 100-1000 times ...
5
votes
0answers
1k views

Mouse Scroll Wheel Speed Far too sensitive

In my crunchbang installation with X11, openbox, my wireless usb mouse is listed at both /dev/psaux and /dev/input/mouse0. It's working fine apart from the scrollwheel, which although active, is far ...
4
votes
0answers
73 views

When running 'su - username', pam_group doesn't add additional groups from /etc/security/group.conf but sshd login does?

I am having trouble determining why su doesn't behave as the PAM configuration would imply. In short, using su to become another user should load secondary groups according to PAM configuration, but ...
4
votes
0answers
303 views

Understanding Broadcom setup and kernel files

I often install Linux distros form live usb/CDs. For that I would like to be able to setup my wireless without any internet connexion. I have a Broadcom chipset : $ lspci -k 04:00.0 Network ...
4
votes
0answers
275 views

Why does hdparm see two different values for the size of a drive?

I have a 1 TB drive attached via USB. It contains an LVM physical volume filling the entire device (without any partition table). When I tried to extend a logical volume by using the entire PV, the ...
4
votes
0answers
137 views

Host system keyboard layout changes when starting LXC container

I successfully created an archlinux container on an archlinux host with lxc. However, whenever I start a container via lxc-start -n GUESTNAME the keyboard layout changes to the default ...
4
votes
0answers
45 views

Can I limit total cputime used by a cgroup?

Although cgroups seemingly allow to control the CFS bandwidth of a cgroup, I don't see a way of enforcing a cpu time limit on a cgroup. The use case is that I would like to catch student programs that ...
4
votes
0answers
599 views

How to set a background image for urxvt?

How do I set a tiled background image in urxvt? I have tried the following alternatives in my .Xresources file: URxvt*backgroundPixmap: /home/jgg/Pictures/tiles/escheresque_ste.png;style=tiled ...
4
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0answers
181 views

cabal dies on NixOS in KVM

I set up a NixOS system on KVM and installed the haskelPlatform package. Everything works fine, ghci works fine, but cabal dies without any helpful error message: [michas@nix:~]$ type -a cabal cabal ...
4
votes
0answers
597 views

How do I let an SDL app (not running as root) use the console

I want to use an SDL-based program to display graphics on the console, without having to log on from the console, and without running the program as root. For example, I want to be able to run it via ...
4
votes
0answers
529 views

Are there any tools to test MTD/JFFS2 for Linux 2.4 kernels

I have some issues with a platform I support and I suspect memory problems. I wanted to check the Flash parts using some MTD JFFS2 test tools, I found a link to a bunch on this site. However they ...
4
votes
0answers
314 views

Screen flickers in Fedora 17

Screen flickers every 10 seconds. (I timed with a stopwatch, screen flickers every 10 seconds, 6 times a minute exactly.) I've used Windows and I'm trying to use Linux. I don't know much about Linux. ...
4
votes
0answers
2k views

How do I find out the device node corresponding to my device in SuSE 8?

I'm forced to work with a bunch of point-of-sale systems running SuSE 8. They are my client's computers. We are stuck dealing with these old systems until they get to upgrade their whole fleet to SLE ...
4
votes
0answers
595 views

How to set up an encrypted directory to be mounted only during samba access?

(This is not about restricting client access, for which ext3 permissions do the trick) I'd like to encrypt the data on my NAS drive (Buffalo LinkStation Pro with SSH access enabled, if that matters) ...
4
votes
0answers
394 views

Setting Framebuffer splash resolution when exiting X

I installed a copy of BackTrack 5 R2 (Ubuntu 10.04) to my HDD and dual-booted with Windows 7. After a bit of tweaking I set about updating the native Intel drivers because it was only allowing me to ...
4
votes
0answers
488 views

GNU/Linux, IO performance problems

I have some problems with my system performance. As I was adviced here, I used sar: $sar -u 5 and found out that the problems are caused by a low HDD performance, as I supposed (high %iowait). ...
4
votes
0answers
929 views

Automounting not working correctly for CIFS shares; weird results

I followed the guide on this page to get samba shares working via autofs: http://www.howtoforge.com/accessing_windows_or_samba_shares_using_autofs Servers and Configuration My Samba server (remote) ...
4
votes
0answers
222 views

fsarchiver error

I'm running the following fsarchiver command: $ fsarchiver restfs /tmp/backup/c0d0p2.fsa id=0,dest=/dev/cciss/c0d0p2 I get the following error: [errno=22, Invalid argument]: ...
3
votes
0answers
28 views

how to see original and --bind mountpoints

Lest say I mount a usb drive to /mnt and next I run this... mount --bind /mnt /tmp/test.d It's a successful bind, but now when I run lsblk only the bind point shows. How can I get all bound and ...
3
votes
0answers
27 views

ack.pl tool and ack.pl flags

I am using the ack.pl tool in order to search string or IP’s in files The official site of ack.pl is - http://beyondgrep.com/documentation/ Example of ack.pl CLI ( want to find the string ...
3
votes
0answers
38 views

Set maximum volume in Arch Linux

Recently, I purchased new over-ear headphones that have some really powerful speakers. I usually have to listen at ~4% volume to use them comfortably. Each time I restart my computer, they move back ...
3
votes
0answers
42 views

How to restore RAID5 Array

I have a RAID5 array consisting of 3 identical 2TB drives. Suddenly GRUB wouldn't boot anymore and gave the error out of disk. Eventually booted a livecd and ran some mdadm commands: mdadm --examine ...
3
votes
0answers
71 views

Linux - On boot do push-button-connect to strongest wireless

I'm trying to configure linux (in this case CentOS) to automatically connect to the nearest WiFi via "push-button-connect". This micro computer has no keyboard or display, so the goal is to hit the ...
3
votes
0answers
99 views

Multiple wget calls in a single session?

I have the following code to retrieve a page from a website that needs authentication (it uses Sungard Higher Education authentication): wget --delete-after --save-cookies cookies.txt ...
3
votes
0answers
94 views

Does Samba 4 actually respect Unix file acls?

After researching the subject on the internet I drew a conclusion that Samba should take into account Unix file acls. During my tests I found the opposite. Only Unix file mode bits are respected, and ...
3
votes
0answers
52 views

Discover what is cached by dm-cache

I am using dm-cache successfully for quite a while now. Now I would like to know which files are being currently in the cache. I understand that dm-cache works with blocks, not files, but since there ...
3
votes
0answers
49 views

Can't connect to some WiFis, Linux on Macbook Pro

I just recently installed Fedora 20 on my Macbook, with MATE desktop. Everything is fine at home (WiFi WPA2, connects without any issues whatsoever). Today is my first day back at Uni with the new ...
3
votes
0answers
46 views

Is it safe to use tar even if there are some characters other than ASCII in filenames and paths?

Is it safe to use tar even if there are some characters other than ASCII printable characters? For example, Japanese characters, Chinese characters, newline character etc. Are there any known ...
3
votes
0answers
49 views

high precision subsecond cronjob replacement

I am looking for a cron replacement which could run subsecond schedule, is there have any "still alive" project which serve this purpose? Currently running Ubuntu 14
3
votes
0answers
64 views

Bad/strange USB device issue: failed to shutdown/restart

On a fresh Arch Linux installation with Intel i7 processor and an Nvidia graphics card, I noticed during boot log messages related to a usb device filled the screen before it reached the graphical ...
3
votes
0answers
199 views

How can I properly QoS streaming services on OpenWRT

I'm going to start by explaining my naivete, I'm not sure, if netflix via a web browser uses the same protocol (http?) as netflix via a smart tv, for example. I'm using OpenWRT 14.07 currently, and am ...
3
votes
0answers
101 views

Replicate a complex partition structure with LUKS and LVM volumes

I have two external hard discs on an OpenSUSE 13.1 system. On one I have created a partition structure: An encrypted LVM partition (LUKS) Several volumes (10) on this LVM partition, some formatted ...
3
votes
0answers
59 views

Does Linux provide Predictive Self-Healing on x86?

Predictive Self Healing is a feature of the OS to predict, detect a fault with one of its components and automatically repair it. MINIX, Solaris OS and Linux on POWER all have this. But is it ...
3
votes
0answers
75 views

How do I temporarily extract a flash drive or HDD in Linux?

Suppose I mounted a disk in this way: mount /dev/sdb /mnt/tmp I have some files opened on this filesystem and don't want to unmount it. However I want to temporarily extract the device, then ...
3
votes
0answers
68 views

Disable USB drive from sleeping

I am loading fedora20 directly from a SATA drive connected via USB. The problem is that I will be working and all of a sudden the drive seems to have been put to sleep and nothing will work except ...
3
votes
0answers
145 views

Can inotify be used to watch for a specific file to be created without monitoring the entire directory?

I want to be notified when a specific filename is created. I'm looking at inotify. The IN_CREATE flag is available for monitoring a directory for any changes within it, but I'd prefer not to monitor ...
3
votes
0answers
43 views

How Does X build its modelist?

I have an embedded board running Linux 3.0.35 and X.Org 1.14.4. I'm modifying an existing framebuffer driver to support a new connector type. I'm reading the EDID, creating a new modelist using the ...
3
votes
0answers
395 views

Difference between 'sar' and 'iostat' commands

With sar and iowait, we can get CPU time utilization. But, when I executed both commands, I could see significant differences in their outputs. > iostat && sar 1 1 Linux ...
3
votes
0answers
130 views

Why are block sizes limited by page size in Linux?

In many (all?) file systems that Linux uses, including ext2/3/4, the maximum block size is the page size of the architecture Linux is running on, ie. 4KiB on x86. Why is there this limit? Might this ...
3
votes
0answers
58 views

Typing punctuation adds an accent to the preceding letter after my laptop is docked for a few minutes

I am running Manjaro XFCE. Everything worked like a charm for months now, but 2 weeks ago the keyboard configuration from my external keyboard seems damaged. Writing on my laptop itself works ...
3
votes
0answers
55 views

Stop init.d from running, and go to terminal prompt

I'm running Rasbian (Debian?) on my Raspberry Pi, and have allot of auto-starting things in init.d. But what if I want to stop them all from running, and simply break into a terminal prompt? I've ...
3
votes
0answers
152 views

Why is my swap not being activated automatically via fstab?

I've got a Linux embedded system that I'm experimenting with (the Elektor Embedded Linux Made Easy board, based on the GNUBLIN http://en.gnublin.org/index.php/GNUBLIN-Elektor). I'm using the 3.3 ...
3
votes
0answers
315 views

Have tmux wait until I SSH in, to complete rest of Tmuxinator script

After recently discovering tmux and Tmuxinator, I've been trying to set up a development environment to use. Per protocol, we aren't allowed to store passwords/passphrases in scripts. So what I'm ...
3
votes
0answers
65 views

Is Watchdog can be disabled if once it is enabled?

I created a watchdog daemon application with time interval of 30 seconds; for every 5 seconds, I am trying to hit the watchdog counter, and it's working fine. If I kill this daemon process it shows ...
3
votes
0answers
169 views

Where is the input method configuration file?

My ibus input method was broken after an update. So I switched to fcitx. Actually, there are a handful IMs installed in my Fedora19 system, e.g. fcitx, ibus, yong, etc. However, I don't know how to ...
3
votes
0answers
2k views

How to change position of unity launcher in Ubuntu?

How can I change the position of unity launcher?
3
votes
0answers
642 views

Linux - Only first virtual interface can ping external gateway

I created 3 virtual interfaces with different MAC addresses all linked to the same physical interface. I see that they can successfully arp for the gateway (gw) and they can ping (the request is ...
3
votes
0answers
149 views

How to mount '.img' file (extracted cubian file) in ubuntu

I used this command sudo mount -t ext2 -o loop Cubian-desktop-r1-a20.img mountpoint Output from this command is mount: wrong fs type, bad option, bad superblock on /dev/loop0, missing ...
3
votes
0answers
62 views

Merge partitions

Due to some unfortunate partitioning I ended up with the following layout: /dev/sda1 (0-120MB) 128MB (boot) /dev/sda2 (128MB-500GB) 500GB (empty) /dev/sda3 (500GB-1TB) 500GB (zfs) ...
3
votes
0answers
424 views

linux udev rule to load gadget module for client driver

I'm having a hard time automating loading a gadget module and bringing up the usb0 device as a eth interface. The interface in question is g_ether for a embedded Linux device and connecting to a PC. ...