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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4
votes
1answer
26 views

ZFS: Trying to remove top-level drive from Zpool

I have a zpool called storage that contains a five device raidz1 array. Today I went and bought another 3TB device and put it in my enclosure. However, instead of creating a new pool and adding that ...
1
vote
2answers
10 views

Know which terminal to use to execute commands depending on Linux in Java program

I am writing a platform independent Java console tool and within which will have to execute some commands in separate independent terminal at runtime. However, I need to know which terminal should I ...
15
votes
4answers
7k views

Resume transfer of a single file by rsync

In Ubuntu, I want to copy a big file from my hard drive to a removable drive by rsync. For some other reason, the operation cannot complete in a single run. So I am trying to figure out how to use ...
4
votes
2answers
257 views

How can I test if a variable is empty or contains only spaces?

The following bash syntax verifies if param isn't empty: [[ ! -z $param ]] For example: param="" [[ ! -z $param ]] && echo "I am not zero" No output and its fine. But when param ...
17
votes
1answer
844 views

Configuring, compiling and installing a linux kernel

I'd like to try using a kernel other than the one provided by my distro -- either from somewhere else, or as customized by me. Is this difficult or dangerous? Where do I start?
5
votes
2answers
68 views

Linux kernel manual build: resulting binary is 10 times larger than precompiled binaries

I'm using Linux Mint 13 MATE 32bit, I'm trying to build the kernel (primarily for experience and for fun). For now, I like to build it with the same configuration as precompiled kernel, so firstly ...
0
votes
0answers
21 views

how can I backup and restore of partitions and logical volumes?

This is my disk scheme sda1 /boot ext4 sda2 /somefiles ext4 sda3: lvm volgroup1/lvolume1 / ...
1
vote
0answers
9 views

Real vs Actual memory in Xymon/Hobbit

What is the difference between real and actual memory usage in xymon ?
1
vote
1answer
22 views

Is Android compatible with the Linux Standard Base?

Moved from Stack Overflow, where I realize it was off-topic since it was asking for sources - far as I can tell, the rules forbid that there but not here. I know that the kernel in Android is now ...
0
votes
2answers
37 views

Debian VLAN (8021q) Configuration doesn't work

I try to setup VLANs on a virtual Debian machine. It's connected to an Cisco 2960 Switch. The Switch has 3 VLANs (1,100,200) which're allowed the pass the trunk. The Switch Configurations was tested ...
0
votes
0answers
14 views

Inotify notifies only single change

I set the inotify_add_watch to watch /dev/disks. The entries in this directory are: by-id and by-uuid. When I plug-in a pen-drive, this directory gets added with two more directories: by-path and ...
11
votes
2answers
2k views

What happens when I close() a file descriptor?

I am trying to get the whole picture with file descriptors. Say I have process1 which initially has these file descriptors: _process1_ | | | 0 stdin | | 1 stdout | | 2 stderr | ...
1
vote
2answers
1k views

No rule to make target `include/config/auto.conf', needed by `include/config/kernel.release'. Stop

I am working on petalinux, a linux port for Xilinx FPGAs called Zynq. The tool that I am using is petalinux-config. This opens a GUI where I can select various options, such as compress kernel, ...
0
votes
0answers
7 views

raspberry pi pulseaudio server connection failure

I purchased a raspberry pi model b , after installing image, the first thing I do is I installed vlc and copy a mp4 video in raspberry pi. Now from command prompt I tried to run my video using vlc. ...
3
votes
1answer
57 views

How does `stdin` of linux work?

I know that stdin refers to standard input in linux, usually the keyboard. It can also be referred by file descriptor 0. So, which file descriptor does the (standard input) mouse refer to? Or is it a ...
3
votes
1answer
83 views

mounting a SD card without a partition

I try to mount a SDHC card under GNU/Linux. Unlike what happens usually, /var/log/syslog doesn't mention sdb1, just: Jul 26 16:07:53 xvii kernel: [ 159.404842] scsi 6:0:0:0: Direct-Access Singim ...
0
votes
1answer
24 views

VPS SSH and my OWN IP

Is it possible to to stay in total anonymous mode for the VPS provider? I have got a VPSVZ machine with UBUNTU server. Is it possible to do anonymous tunneling: VPS1 -> VPS2 -> VPS3 (all UBUNTU) ...
0
votes
1answer
314 views

hw csum failure

For the past 5 days, my Internet connection just drop randomly. After some researches, I found this into the syslog : Jun 25 17:01:59 home kernel: [127541.168744] eth1: hw csum failure. Jun 25 ...
3
votes
0answers
37 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 ...
0
votes
2answers
39 views

What are the positions in `free` called?

I am trying to compare the output of free with the output of sar -r: # sar -r 12:00:01 AM kbmemfree kbmemused %memused kbbuffers kbcached kbcommit %commit 12:10:01 AM 629756 65293976 ...
1
vote
1answer
2 views

Setting running process affinity with taskset fails

I'm attempting to limit a process to a given number of CPU cores. According to the taskset man page and this documentation, the following should work: [fedora@dfarrell-opendaylight-cbench-devel ~]$ ...
3
votes
1answer
44 views

Does “mount -o remount,ro” flush filesystem buffers?

On Linux, does mount -o remount,ro flush filesystem buffers/cache, or should I also run sync to achieve that?
2
votes
1answer
291 views

Boot graphical application straight from Linux bootup (without verbose boot messages and desktop)

Is it possible to boot from minimum Linux core(Linux/Android) to an application (preferably created in interchangeable platform languages such as C# – Mono / GTK / Java / C) without any verbose ...
1
vote
1answer
468 views

Command/scripts to check the Reverse DNS Lookup time

I am working on a project in which one master communicates with numbers of slaves. For that it has to make connection with hosts in network. But sometimes it hangs. I think that the reason behind is ...
1
vote
1answer
616 views

Deleting Non-empty Directory with smbclient

How can I remove a non-empty directory with smbclient? I have tried the following: 1) rm Result: NT_STATUS_NO_SUCH_FILE listing [dir_path] 2) recurse;rm Result: No Error but also nothing ...
5
votes
2answers
256 views

Should I use LILO or GRUB or other?

I am making a netinstall DVD which will have netinstall for 10 different Linux distros on it. I will need to install a bootloader on the disk so I can choose which distro I want to install. Which is ...
1
vote
1answer
542 views

Can I use a parallel port as a CUPS input device?

I have an old piece of a hardware that does diagnostics on medical equipment. It prints out results over a parallel port. Is there any way to have CUPS accept jobs from a parallel port and redirect ...
3
votes
1answer
1k views

How can I downgrade a glibc version?

I upgraded glibc for a reason that isn't arround anymore so i want to downgrade it again. The stupid thing is a lot of programms rely on glibc at the moment. I still have the 2.4 version on the system ...
3
votes
1answer
73 views

How can I add additional resolution for my screen?

I tried to launch a game (GTA San Andreas) on wine. GTA showed Cannot find 800x600x32 video mode and closed immediately. The Computer I currently have is a Lenovo IdeaPad G510, with Intel HD ...
9
votes
11answers
7k views

How can I “cat” a file and remove commented lines?

I'd like to know if there is a way that I could cat file like php.ini and remove all lines starting with ; For example, if the file contained this: ; - Show all errors, except for notices ; ...
2
votes
4answers
110 views

Number of processors in /proc/cpuinfo

While i was learning about cpu load i came to know that it depends on numbers of core. if i have 2 cores then load 2 will give 100% cpu utilization. So i tried to find out cores.( i already know that ...
2
votes
1answer
922 views

Sphinx Search shutting down after `FATAL: accept() failed: Too many open files`

I'm running Sphinx Search Server V2.06 ( the latest stable release ) on an Amazon EC2 with Linux CentOS. In general it is running fine, but the searchd.log is showing this error over and over with ...
1
vote
1answer
350 views

Why system call hooking produces different result everytime in Linux/Android 2.6.29?

I have implemented system call hooking for Android 2.6.29 kernel through a LKM module. I am tracing down one Android app for system calls. But interestingly, it returns different results every time I ...
6
votes
2answers
33 views

How to make files inside TMPFS more likely to swap

I'm using tmpfs for my /tmp directory. How can I make the computer decide to swap out the files inside the /tmp before swapping out anything that is being used by applications? Basically the files ...
0
votes
0answers
16 views

Unable to connect to source.repository.backtrack-linux.org

I have a BackTrack5 r3 installed on VMware. As you see below I have internet access in it : root@bt:~# ping www.google.com PING www.google.com (173.194.70.105) 56(84) bytes of data. 64 bytes from ...
1
vote
0answers
27 views

A problem with ubuntu [on hold]

I have a Dell Inspiron 1420 with Windows Vista. I wanted to install Ubuntu on it, so I burned the ISO file to a 16GB flash memory and I booted the laptop from it. I tried to install Ubuntu on the hard ...
2
votes
3answers
6k views

KVM - Which Web Based management to use?

I would like to became an Expert of managing KVM on debian squeeze. I still use virt-manager. Yes, it is easy and quiet safe and quick for me. I tried a lot of web based management UI and non of ...
3
votes
2answers
5k views

Installing wireless driver (realtek 8188CE) on Debian wheezy

I had a hard time installing the wireless driver for my debian. My debian was Sqeeze but soon after I realized Wheezy was the one to support my wireless adapter, realtek 8188CE,I upgraded to wheezy. ...
2
votes
1answer
310 views

Kernel headers for VMware tools

I tried to compile VMware tools on my server. I compiled the kernel myself, I didn't use RPM. As VMware tools needs the kernel header files, I executed the following command in my kernel folder ...
3
votes
0answers
31 views

RAID-1 mirror has become a single hard disk

I have an HP N40L microserver, with 2 identical drives, I used the system to hardware-RAID them as a mirror. I then installed mint on the system about a year ago. This has been running perfectly, ...
0
votes
0answers
5 views

Why surt1000xli APC UPS recognised by NUT apcsmart driver as “old”?

So I have this UPS connected to machine with a RS232/USB cable. ups.conf contains [apc1] driver = apcsmart port = /dev/ttyUSB0 desc = "APC USB" And I get the following output: $ sudo ...
2
votes
2answers
39 views

How to view files hidden by a mount on Debian 6

I have been trying for a while to view files, hidden by a mount on my device sporting Debian 6, to no avail, and being new to Linux, I am compelled to ask the question: How do you view files hidden by ...
2
votes
2answers
551 views

How to increase the timer before drive spins-down?

I use Ubuntu 12 beta on a Lenovo Z575. I noticed that the disk spins down a few seconds after the last operation. When I am working, e.g. in the vim and write quite often, it spins-up and -down ...
5
votes
3answers
83 views

Which command to force a drive to spin up?

I've looked through the manual for hdparm, sdparm. I know there are arguments to spin down the drive, with -y and -Y. I also know there are arguments to control the power saving features, such as -S ...
1
vote
1answer
42 views

Curious about strange ICMP type 3 code 10 traffic to my IP address

My firewall (iptables) logs some strange ICMP type 3 code 10 traffic that I am curious to understand (specifically how or if this could be an exploit of some sort). Type 3 = Destination ...
3
votes
3answers
735 views

How to enable wifi using keyboard (Dell Inspiron 14r) in suse Linux 11.4

I have installed both Windows and SUSE Linux (11.4) on my Dell Inspiron 14r laptop. Both are working properly. I am facing one strange problem. I went to my Linux OS wifi was working fine and I ...
2
votes
0answers
15 views

How to create GUIs (such as menuconfig) with lxdialog

I try to generate a menuconfig by my own with the help of lxdialog (source: lxdialog). Unfortunately this is not so well documented as I wished for. Example: So what I did: I included these files ...
7
votes
1answer
433 views

What does a dot after the file permission bits mean?

I performed an ls -la on directory on my CentOS 6.4 server here and the permissions for a given file came out as: -rwxr-xr-x. I understand what -rwxr-xr-x means, what I don't understand is the . ...
1
vote
1answer
459 views

Build Linux and run it (uImage) on the Beagle board - xM

I'm working on some project where I'm using the Beagle board - xM Rev C. Power supply is 5V/2A adapter. My task is porting Linux Angstrom on the board but I have some problems. I have choosen Linux ...
5
votes
1answer
403 views

SquashFS image as rootfs in LXC

Is it possible to use a SquashFS filesystem as an LXC rootfs? I can mount an ext3 image as a rootfs just by setting lxc.rootfs to the filename, but if it's any other type of image, lxc-start just says ...