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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0
votes
1answer
539 views

how to have root partition LVM for RHEL 5.8 64 bit on AWS EC2

I am new to this and I have to create a RHEL 5.8 Amazon Machine Image (AMI) in which the root partition should be a logical volume. I know how to create a data partition as a logical volume but am not ...
3
votes
4answers
4k views

Why did my package get installed to /opt?

A while back I installed couchdb from source on my debian machine. It seemed to install okay and everything worked. A few weeks later I wanted to upgrade and installed from a .deb using dpkg. ...
2
votes
2answers
66 views

Change Password Programmatically

In the current version of Raspian, I know it is possible to change the password of the current logged in user from the command line like so: sudo passwd which will then prompt the user to enter a ...
2
votes
0answers
25 views

Thin LVM pool frozen due to lack of free space, what to do?

My thin LVM pool got full and some programs hung: device-mapper: thin: 253:4: reached low water mark, sending event. device-mapper: thin: 253:4: no free space available. INFO: task jbd2/dm-6-8:742 ...
0
votes
0answers
16 views

How to add routes multiple times in routing table?

Need to add same route multiple times in the routing table, or is there a way to maintain references in the routing table entries ? (may be with different priorities etc.) Am working on a switch ...
2
votes
1answer
242 views

What are the systemd command line options “--switched-root” and “--deserialize”?

Doing a ps on my Linux box shows that systemd runs with the command line options --switched-root and --deserialize. Nothing in the man page or /usr/share/doc/systemd mentions them, and Google hasn't ...
0
votes
2answers
34 views

/usr/java/jre1.8.0_31/bin/java.exe: No such file or directory

I've been trying to run a plugin inside a I have hired, and I've constantly been getting this error: [04:13:41] /bin/sh: /usr/java/jre1.8.0_31/bin/java.exe: No such file or directory Not too sure ...
0
votes
0answers
17 views

Which flags should I use for my “netstat” commands?

I would like to use two variants of the netstat command; one exclusively for IPv4 and the other exclusively for IPv6 traffic. In both cases I would only like to list the following information: ...
2
votes
1answer
61 views

Device eth0 does not seem to be present, delaying initialization

I have cloned a fedora and now trying to configure network interfaces. Every time i am adding a new NIC, it starts with number eth3 (rather eth0). i have tried removing and modifying the ...
1
vote
0answers
7 views

Can I create a buffer file with arecord?

I need to record some sounds from my audiocard to make a stream(Nothing special in this just trying new things), but I can't make the arecord play direct on it, so can I create a buffer file where the ...
5
votes
1answer
145 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 ...
2
votes
1answer
806 views

Startx results in a black screen

I recently wanted to solve a problem with using a second monitor from my laptop that is running debian (jessie) but because I lack knowledge things didn't go as planned. Now I am getting booted into ...
1
vote
2answers
755 views

Linux guest VM on mac host - Keyboard

I use a Mac as a development box, but am slowly transitioning to Linux. So I am spending the majority of my time in the Linux guest VM while working. But I still spend a fair amount of time in Mac ...
51
votes
5answers
38k views

What is a Superblock, Inode, Dentry and a File?

From the article Anatomy of Linux File Systems by Tim Jones, I read that Linux views all the file systems from the perspective of a common set of objects and these objects are superblock, inode, ...
0
votes
1answer
44 views

UNIX Account management

Would like to know if there's some opensource solution aimed to manage and administer system authentication and RSA keys for staff, contractors and clients across the organization. My systems to ...
0
votes
1answer
26 views

Install mail server in VM

I have a Intel NUC with an i3 processor running the latest Mint version with the Cinnamon desktop and already installed some basic services (Apache, MariaDb, ownCloud etc). The next step would be to ...
1
vote
2answers
59 views

How to keep a process from running?

I can kill a process. But how do I keep that process from being called up again without removing it from Linux? For example, if I run something like netstat to find the port associated with the ...
0
votes
0answers
15 views

centos 7 installation with customized bridge module

I have installed latest Centos 7 x64 edition in my server. I need to modify the linux-bridge module with some customized changes and use it as a default bridge module. Currently I am building centos ...
1
vote
1answer
19 views

how to change cifs timeout

Happens when from my laptop I change wifi network that I've to wait 5 minutes before that I can umount cifs share. mount -t cifs //ip/share /home/user/net/share -o user=user,pass=pass I didn't ...
1
vote
1answer
37 views

How can I have a system boot in to a root session and then run a command within that session?

I have a GNU/Linux system with one account, the root account. When I boot the system, I want it to automatically log in to the root account and then run a 'telnet' command within that session. How can ...
1
vote
0answers
13 views

Setting custom baud rate on console

Just for aesthetics I would like to have my text on my console be displayed at a lower speed. I've tried using things like screen with custom baud rates of /dev/tty1 but it wouldn't work, input from ...
2
votes
1answer
23 views

Grub-install: device vs partition

Grub can be installed to a device (grub-install /dev/sda) and to a certain partition (grub-install /dev/sda1) - as I understood. My question - if we install it to a partition will grub-installer write ...
3
votes
1answer
511 views

Grub and usb serial support

How to access the grub menu using a usb serial converter? I know it's possible to have grub menu in serial console, putting these lines in grub.conf: serial --unit=0 --speed=9600 --word=8 ...
1
vote
0answers
16 views

What does the “Shared” Field indicate in “free” command? [duplicate]

I want to know what "Shared" Column indicates in the "free" command. total used free shared buffers cached Mem: 3818 3677 140 37 ...
6
votes
2answers
86 views

Is it possible to enlarge the / partition without rebooting?

I can enlarge the root (/) partition with fdisk without rebooting (deleting an recreating it with the same 1st sector, but greater last sector). However, I cannot make the kernel to re-read the ...
0
votes
2answers
853 views

Linux Permissions vsftpd

I have mybb installed and running in /var/www/forums. I have two users part of the www group, logan and www-data. I have the recursive permissions of forums directory set to: chmod -R 755 forums ...
0
votes
0answers
8 views

Turn on bluetooth on login screen

Is it possible to have bluetooth turned on and use a bluetooth keyboard when at the login screen? So far I only managed to start the bluetooth daemon when logged in. I added it to systemd with ...
0
votes
1answer
10 views

how to properly configure samba access using groups

I am having trouble trying to get a specific group to access samba server through windows. is it possible to allow certain groups to the file sharing server? example, I have a group called ...
2
votes
1answer
510 views

How to enable/disable a serial port?

I need to disable and then enable a serial port for testing purposes on a Java program. Since the man page of setserial is stating: "Using UART type none will disable the port.", I use sudo setserial ...
0
votes
0answers
40 views

Conceptual question about data corruption and mounting

If we have a partition /dev/sda1, and mount it to a mount point (i.e. /mnt), we can then use the files and folders under /mnt. Before changing the partition /dev/sda1 I umount /mnt, and then perform ...
3
votes
3answers
1k 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 ...
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 scroll wheel, which although active, is far ...
5
votes
0answers
469 views

'OS X-like' momentum scrolling in linux?

Is there a way to make the scrolling on a linux machine (running X11) more like OS X's natural scrolling? With 'natural scrolling' I mean the fact that you can flick trough the pages, there is ...
4
votes
2answers
40 views

htop shows only the processes of the user that's running it?

On my old Debian Wheezy I see as a normal user without sudo all processes from all user in htop. On my new Debian Wheezy I only see my own processes. Old system kernel: 3.2.0-4 New system kernel: ...
0
votes
1answer
36 views

Partitioning problem in Kali Linux installation

I'm trying to install Kali Linux dual boot with windows 8.1. During installation, only two partitiones: while I have 3 different partitions . Please help.
1
vote
1answer
2k views

Dual-boot Ubuntu cannot access the Windows drive that it was installed on with wubi

I had Widonws with two drives C: and D:. In the drive C:, I have my Windows. In the drive D:, I had my all other files and data. I installed Ubuntu in the drive D:, without deleting any data from it. ...
0
votes
1answer
779 views

What multimedia support should I use in centOS 7

I have recently installed Cent OS7. Its looks very nice at first. But soon realized it has a horrible multimedia support. Its own player cannot install the codecs it requires, which was much easier in ...
-3
votes
0answers
27 views

Application compatibility in Linux [closed]

Why is application compatibility not good in Linux OSs even in different versions the same distros? Application Compatibility for me: I'm a Ubuntu user, and if I carry and use the .deb files on some ...
2
votes
1answer
2k views

Unable to use yum repos whether with baseurl or mirrorlist in CentOS 6.5

Since a couple of days, I'm unable to retrieve repositories data with Yum, in my CentOS 6.5 server. I did yum clean all a dozen of times, it emptied all but didn't solved the problem. I tried to ...
0
votes
0answers
25 views

Show last x lines of a screen session?

/etc/init.d/mc {..} status) if screen -ls | grep -q "mc"; then echo -e "[\033[32mMC\033[0m] Online" {.. needed code ..} else echo -e ...
2
votes
1answer
25 views

how to overcome conflict between 2 network cards - virtualbox ubuntu

I am running ubuntu 10.4.04 LTS as guest in virtualbox on OSX Yosemite. Unfortunatelly I seem to have the network configured wrong I followed this tutorials ...
1
vote
0answers
19 views

Can't see boot options or log with GRUB through serial-over-lan

I have a Debian system that is unable to boot a configuration I want. I don't have physical access to it, but I have serial-over-LAN access via Dell's BMC (so very limited), IPMI 1.5/isol. When I boot ...
2
votes
1answer
610 views

How to monitor per user disk usage in Linux

I have local disk with 2T capacity attached to a host. Nearly 60 user home directories are stored on this disk. Currently no disk quotas are enabled. I need monitor the disk usage of individual ...
1
vote
4answers
41 views

Regarding awk command

Can any one tell me how can i add a particular word in whole file using awk command. data look like this: Organism: ahy matching miRNAs miR156a miR156b miR156c miR159 miR167 ...
-1
votes
0answers
24 views

Unix server -bash: sudo: command not found [closed]

I Just bought a server where i have to Install apache2 server when I try using command line sudo apt-get install apache2 than it's gave me error like -bash: sudo: command not found Also apt-get ...
2
votes
0answers
23 views

Reasons for IPC control in Linux [closed]

Linux OS has several IPC mechanisms like named pipes, sys V, d-bus etc. Each of these mechanisms always has senders and receivers of IPC; each mechanism uses some way to control IPC between senders ...
3
votes
1answer
464 views

load module via /etc/modules

I want to load my kernel module hello.ko on boot in Ubuntu 12.04. I placed it in /lib/modules/3.8.0-31-generic/kernel/ubuntu/hello.ko, ran depmod -a, and added "hello" to /etc/modules. However, when ...
1
vote
1answer
800 views

How to migrate from Proxmox to VMWare?

I am wondering how it is possible to migrate a full hardware VM in Proxmox (qemu) to a full hardware VM in VMWare (vmdk). I have been searching all over the place, and it seems almost impossible to ...
0
votes
3answers
11 views

How to remove directory from rsync share completely

Is there any rsync command that can remove some remote directory from rsync share completely? I mean delete not only directory content but the directory itself. And without rsyncing the entire parent ...
2
votes
1answer
69 views

Cron job not running after giving command in crontab

I am trying to run a cron job in Linux with following command: crontab -e typing the following details and saving it MAILTO="mail@domain.com" 00 01 * * * /usr/local/bin/php /var/www/html/cron.php ...