Questions specifically about Linux but not specific to a particular distribution. If the question could apply to any Unix-like system, specify your Linux distribution in the body of your question but do not use the /linux tag.

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0answers
781 views

system won't poweroff, restarts with :“Synchronizing SCSI cache”

Running Debian testing, after a system upgrade a while back my machine started to refuse to power down. It hangs with: Synchronizing SCSI cache Waits a few seconds, and then reboots itself. It ...
1
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0answers
177 views

Why are USB partitions & disk capacity not coherent between fdisk, parted, dmesg & /dev/sdXy

Disclaimer: I initially posted this on SF : http://serverfault.com/q/645670, but I think it better fits here First, a word of context: I'm trying to burn an ISO on a 16 Gb USB key, but I'm having ...
1
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0answers
647 views

Unable to mount a UFS filesystem from Sparc Solaris to x86_64 Linux

I have a requirement to copy a very large amount of data from a Solaris 9 (Sparc) system to a SLES11 (x84_64) system. The Solaris system is quite old, and transferring the data over the network will ...
4
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4answers
2k views

Partitioning a 2tb drive

Im new to linux Im planning to install Squeeze on a 2tb hard drive a follows: / - 10gb swap remaining space will contain /home, around 1.9tb i hope, i will try to use as lvm to add my old 1tb drive ...
0
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1answer
378 views

What software should I use to create a HPC (High performance compute) cluster with CentOS 6.5 VMs locally?

I've read about Torque, Slurm resource managers and Maui, Open Grid scheduler, Sonf of Grid Engine but I do not know which is more appropriate to use in a local environment? I've also read that I need ...
1
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0answers
94 views

Login kickout every time in Ubuntu Server 14.04 LTS

We have installed Ubuntu 14.04 LTS in our production servers. Our dedicated server disk was filled, due to that issue, one of the production servers stopped. While troubleshooting I found that disk ...
0
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1answer
50 views

Where can I download the software RPM for Redhat?

I try to download some software RPMs(such as gcc, gdb, etc.) for Redhat enterprise version. But after googling, I only find this website:https://access.redhat.com/downloads. This site doesn't seem to ...
2
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1answer
95 views

Enable numlock only for external keyboard

I'm not sure this is possible, but I thought why not to ask. I have a laptop without a numeric block, and use it sometimes with external keyboard. Numlock for the internal keyboard = useless, so I ...
6
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2answers
4k views

How could I eliminate Kerberos for passwd?

When I issue a command to change my password like this: sudo passwd huahsin The system prompt me: Current Kerberos password: I don't know what I have done to the system configuration, how could I ...
2
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0answers
531 views

How do I get ata-style IDs in /dev/disk/by-id to work for USB disks?

I have USB drive dock that I'm plugging SATA drives into. The way they show up in /dev/disk/by-id seems to be dependent on whether the drive has a partition table (usb if not, ata if yes). This makes ...
12
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3answers
4k views

On system memory… specifically the difference between `tmpfs,` `shm,` and `hugepages…`

I've been curious lately about the various Linux kernel memory based filesystems. Note: As far as I'm concerned, the questions below should be considered more or less optional when compared with a ...
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votes
4answers
3k views

Why doesn't the nohup command seem to be working?

Please let me know any example that shows nohup is working for a program even after logout. I tried using it without the nohup command to run a script in the background and it seems to be working even ...
1
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3answers
2k views

Taking away a User's Read/Write/Execute Permission

So I have a user that is able to go in /etc and read files like httpd.conf. I would like to deny that user access to any critical locations such as /etc, /var and so on. What would be the best way ...
4
votes
1answer
760 views

Windows Changes File Permissions in Samba File Shares

I have mounted an external USB drive that is used for file shares on CentOS. All of the clients access the shares are Windows XP or 7. Within Windows, I use the "Manage your credentials" feature in ...
3
votes
1answer
1k views

Is it possible for DHCP to assign different IP addresses to the same machine?

I have installed and configured a DHCP server on my CentOS 6.5. It works properly and assign IP addresses to the clients machines on my network, and as I noticed when a client reconnect the DHCP ...
1
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0answers
60 views

unlimited tmpfs

How to have the advantages of tmpfs and not be limited to its small size? I'm thinking of a shell script that runs as a daemon, monitors RAM and adds more swap files in specified folder, when memory ...
1
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1answer
83 views

Cluster Lock Manager without TCP/IP

I have 2 linux sharing same SAN disk LUN. There are many cluster files systems to manage lock/unlock. But all of them are using a seperate TCP/IP comminication. But I need a cluster lock manager ...
0
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1answer
4k views

Open xlsm file in linux?

For all my spreadsheet needs, I've found Open/Libre Office works fine, and I can receive xls and xlsx files from colleagues, and send files to them. However, I have recently been sent a large xlsm ...
0
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1answer
50 views

Understanding NAT concepts

I began learning networking on Linux, and I am looking for a way to associate a particular IP to a particular MAC address (i.e. a way to edit the NAT table?). Actually I am trying to assign some IPs ...
8
votes
2answers
686 views

Linux cache evictions

Looking at how the VFS cache on my Linux machine behaves, I can see that even when effectively idle (crond and most other daemons stopped, interfaces down) the amount of free memory gradually ...
4
votes
3answers
1k views

Are there any ways or tools to dump the memory cache and buffer?

As the title, I want to check out what files are loaded in buffer. Just so it's clear, the buffers & cache I'm referring to are what show up when you run the free -m command: $ free -m ...
0
votes
1answer
113 views

How can I write an alias for cd such that it will fire ls after going into the directory to which I just cd'ed into? [duplicate]

Lets say I want to do cd home and then ls -lrth. I want these two things combined into a single command. I tried writing an alias, but it didnt work. Can you help me ?
0
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0answers
109 views

Can I share a Virtual Machine between Ubuntu and Windows 7?

I have a Ubuntu Server virtual machine configured on Windows 7 which has a NAT and Host-Only network adapter configured. I have ports forwarded on the NAT connection in order for my host (W7) to ...
13
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3answers
1k views

Do different distros (but same kernel ver) have same hardware support

As far as I know the device drivers are located in the Linux kernel. For example let's say a GNU/Linux distro A has the same kernel version as a GNU/Linux distro B. Does that mean that they have the ...
1
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1answer
356 views

tslib tools don't draw anything on the screen

Trying to calibrate touchscreen for Qt apps with tslib on ARM-device. When running ts_calibrate or ts_test, they both work (i.e. return info about touches) and ts_calibrate successfully calibrates ...
2
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1answer
268 views

what happens during nic master failover?

During NIC master failover, will the mac address of bond0 change?
14
votes
2answers
2k views

What makes an operating system “Unix-Like”?

I frequently come across the term "unix-like" on many web sites. There is no standard; it is just in the way it behaves. But if I were to develop a kernel from scratch, what would make it considered ...
1
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2answers
1k views

How to connect to a Windows server on Ubuntu?

At work I usually run Windows 8 but I'm looking to use Linux since I'm mostly a Linux user. How do I connect to it usually? I just type //MIKE-SERVER then hit ENTER key in address bar of a file ...
0
votes
2answers
3k views

How to switch between tty and xorg session

My xorg session is on tty1 and if I want to issue a command from tty (because I cannot do it from xorg session for some reasons), I press Ctrl+Alt+F2, for example, and type a command. But I cannot ...
1
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0answers
151 views

/home partition recovery

Unhappy with Gnome 3 in Ubuntu I tried Mint 14. Had a backup of my home partition. During the Mint installation I designated my old home partition, and when it booted everything was fine. There ...
2
votes
1answer
480 views

Getting an already installed Android x86 partition to run on KVM

(Originally posted on SuperUser here, but posted here due to lack of responses.) I have Android installed on sda3, and it boots fine when loaded from Grub with the following commands: set ...
0
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0answers
115 views

custom built kernel module problems

I have been struggling to find a solution for loading module ath9k into the kernel and I have met a dead end. The kernel is 3.17.1 taken from kernel.org and I am compiling it in Ubuntu Trusty (14.04) ...
3
votes
1answer
152 views

What is being cached?

I have an embedded system with a low amount of memory. The system has allocation issues. Maybe due to fragmentation: Memory allocation issue on NOMMU? The platform is a NOMMU platform and so I suspect ...
3
votes
1answer
4k views

open /dev/fb0: No such device

I installed fbi framebuffer to view images on TTY terminals (outside X). When I do: fbi image.jpg it outputs the following error: open /dev/fb0 no such device Yet when I run ls /dev/fb*, I ...
1
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2answers
4k views

To configure script to send email only when diff command gives a difference

I'm new to the world of scripting and and currently using a script to perform a health check on the san devices that I manage. The script is simple and redirects output of commands to a current file ...
1
vote
1answer
95 views

Edit/Remove CLI System Notice

I'm wondering how I can change the default system message that shows when on the CLI from Ctrl+Alt+F1. By default it shows the message Welcome to <name> * Documentation: <url> I was ...
2
votes
2answers
112 views

Is it possible to see remotely what physical display is showing on linux machine without X?

We can use VNC to connect to remote X session but how can I remotely connect to that session which is displayed on physical monitor if remote linux machine does not have X installed? UPDATE to make ...
0
votes
0answers
23 views

Set default editor for 'info coreutils' [duplicate]

I'm using Ubuntu 14.04 and have this in my .bash_profile: export EDITOR=/usr/bin/vim export VISUAL=/usr/bin/vim man respects this setting but info always opens in something else, nano or it's own ...
2
votes
1answer
335 views

IP Camera with embedded Linux

I have purchased an IP Camera from Ebay (http://www.ebay.com/itm/151349669865). When I read the description of the camera, it said it has an embedded linux in it. I though that I will be able to ...
1
vote
3answers
1k views

Fedora 20 Gnome upgrade - cannot login anymore

I started to use Fedora with with Gnome 2x. I started to upgrade to gnome 3x when I had some eletric energy problem in my build and my machine turned off. Now I cannot log in any more - meggage "Oh ...
2
votes
2answers
235 views

Doubts about the Buildroot configuration

How can I update my Buildroot without losing my configuration, packages, etc.? And how can I update the Linux kernel that is configured? Is it just change the url from git repository in menuconfig? ...
7
votes
3answers
23k views

FreeNAS versus a regular (CentOS/Ubuntu) linux server?

I'm looking to build a medium sized (6TB, mini ITX board) server for personal use. Most importantly, it will serve as a seedbox and will store a whole lot of data. I will be accessing the data over my ...
2
votes
2answers
3k views

Monodevelop doesn't run the project. When I try to run nothing happens

I've been trying to get Monodevelop up and running for almost a week now, first on my redhat and now on my fedora. The debugger doesn't work, when trying to debug I get this error: I tried ...
2
votes
1answer
288 views

What's the correct way to authenticate a user without PAM?

as my related question doesn't seem to get much love, here another one: What's the proper way to authenticate a user via username/password prompt in Linux nowadays? In principle, I suppose I would ...
10
votes
4answers
1k views

What makes a portable mp3 player work well with Linux?

I'm in the market for a new portable mp3-player, and will be connecting it mostly to a Linux box, but occasionally to a Windows Vista machine as well. I'm wondering what qualities I should be looking ...
7
votes
1answer
1k views

List all files that are present in the cache

This question answers to the question on how to find the what is part of cache. However, in the fincore executable you have to pass the filename to check if it is part of cache. Is there a tools or a ...
2
votes
0answers
142 views

How to determine the wordsize in Linux kernel programming? [closed]

In userspace code, the macro __WORDSIZE is used, included in <bits/wordsize.h>. However, when I do Linux kernel programming, the __WORDSIZE seems not available. If <bits/wordsize.h> is ...
14
votes
3answers
2k views

Does fork() immediately copy the entire process heap in Linux?

A fork() system call clones a child process from the running process. The two processes are identical except for their PID. Naturally, if the processes are just reading from their heaps rather than ...
6
votes
1answer
236 views

Executing a “fork bomb” safely

We've all seen the "fork bomb" that will render a host non-responsive, even if executed in an unprivileged shell: Warning: Do not execute the following shell script. Just don't. :(){ :|:& };: ...
1
vote
1answer
28 views

Automatically pauseing rsync if target is full

I need to transfer 80gb's of unsorted text documents from one computer to another and all I have is a 32gb USB. Is there an option to make rsync automatically pause when the USB is full without losing ...