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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-1
votes
0answers
21 views

Do not work shortcuts in Fedora 21

In Fedora 21 some shortcuts don't work. There is a problem with combinations which have more than two keys (ctrl+shift+tab, ctrl+shift+← etc). Another problem with the Win+R or F12 hotkeys to call ...
0
votes
1answer
37 views

Windows to Linux (rsync and ssh) [closed]

I'm trying to backup the folders in Windows Pictures to a remote Linux directory. This is what I have: rsync -av ssh /cygdrive/c/users/Owner/Pictures/ blah@192.168.1.10:/var/files/ImageSync/ I got ...
0
votes
0answers
20 views

Link Speed for wireless connections [migrated]

I am working to implement a benchmarker for wireless connections. How can I determine the link speed in mbps? I am working with C language and Linux system.
-1
votes
0answers
15 views

Can I install and work with pycuda if I have ubuntu linux 32bit and boot from usb? [closed]

System is 32bit. Have Nvidia Geforce 610M graphics card on my laptop. Am booting ubuntu 14.04 lts from usb
1
vote
1answer
44 views

sort file based one colum and group by another column

I have a file of three columns: 1 A 0.5 2 B 0.7 3 A 10 4 C 4 5 B 4 I want to sort the file by increasing order of column 3 and group by column 2 1 A 0.5 3 A 10 ...
2
votes
3answers
54 views

Bash | port killing loop fails

I am trying to create a bash function which should kill all processes using some ports specified in port_array. The kill-port function works if I call it myself with a port e.g. with kill-port "80";. ...
0
votes
1answer
24 views

page up and page down alternative for horizontal scrolling in less

In vertical scrolling using less the page up and page down keys are working. Which keys scrolls one page down/up vertically? The less was started with -S option.
0
votes
1answer
34 views

How to format old laptop and install CentOS

I have an old laptop with Windows 7. I want to remove everything and install CentOS 7 to turn it into a server. What I know is that I should format the old OS somehow and get iso image of CentOS and ...
0
votes
0answers
15 views

OpenSuse does not show .eps files

I am running on this machine on a cluster: > lsb_release -r -i -c -d Distributor ID: openSUSE project Description: openSUSE 13.2 (Harlequin) (x86_64) Release: 13.2 Codename: Harlequin ...
0
votes
0answers
27 views

Assign IP to a device using BOOTP protocol?

I have a device that is BOOTP enabled, I want to assign an IP to this device on Linux. there are these tools that works perfectly ...
1
vote
1answer
21 views

How does PulseAudio start?

PulseAudio is always running on my system, and it always instantly restarts if it crashes or I kill it. However, I never actually start PulseAudio. I have checked /etc/init.d/ and ...
1
vote
0answers
12 views

rpm --verify does not inform about missing file

I noticed there is a missing file in the MySQL installation in a RHEL server. I want to know if there are more missing files so I tried to use rpm --verify (or rpm -V), however it doesn't output ...
2
votes
1answer
24 views

How to connect between two Linux machines VIA Linux router machine

I have three Linux machines that connected as the following: Linux_machine1 --> Route_linux_machine --> Linux_machine2 How to ssh from Linux_machine1 to Linux_machine2 Only VIA ...
-1
votes
1answer
25 views

how to convert video into webm format using ffmpeg in centos

how to convert video into webm format using ffmpeg and libvpx in centos I have install ffmpeg and libvpx in centos.but it's doesn't convert mp4 format into webm format. but in windows i have check, ...
0
votes
1answer
48 views

Cron Job every 55 minutes [duplicate]

I want cron to be run in every 55 mins. I followed the link CronJob every 25 minutes and my crontab command is */5 * * * * [ $(( $(date +%s) / 60 % 55 )) -eq 0 ] && wget ...
1
vote
3answers
99 views

How to decode base64 text in xml file in Linux?

I'm new in linux (shell). I need to decode base64 text in xml file using linux shell script. Could you please help me to write linux shell script for decoding the values of those tags where attribute ...
0
votes
1answer
20 views

How do I run the query 1 by 1 and return only exit code in bash script? [closed]

I've created a below script :- query1=$(command1) query2=$(command2) query3=$(command3) if [ $? -eq 0] then echo "Success" exit 0 else echo "Failed" exit fi the problem is when I ...
-3
votes
0answers
10 views

reconfiguration of NBD [closed]

please tell me the command of reconfiguration of nbd-server in Ubuntu. I want to reconfigure the nbd-server because when I restart the nbd-server it show me error and I have to reconfigure it
-1
votes
0answers
19 views

network block device: a port was specified but old style export were not requested

I configured the nbd-server in Ubuntu. I configured the following [generic] [myexport] exportname=/dev/sda1 port=9000 Now I restart the nbd-server service #service nbd-server force-reload but ...
0
votes
0answers
13 views

Fast TSC calibration failed error will not allow Debian to boot. Cannot get past GRUB

I have an airvision NVR running debian wheezy with the proprietary OS on top of that. I am a windows admin for years but have minimal linux experience before this. Recently we had a power outage and ...
2
votes
1answer
20 views

/dev/mapper in fdisk

After installing CentOS, I see several lines like /dev/mapper/centos_jackpc--11-swap and /dev/mapper/centos_jackpc--11-root when I issue fdisk -l. What is the purpose of these? And why do they not ...
2
votes
0answers
47 views

How to keep my C program from terminating when CTRL-C is pressed? [migrated]

AFAIK this has something to do with "catch the SIGINT" but I'm looking for more details. Like many others I learn C by writing my own CLI that can start other program located by the environment ...
0
votes
0answers
3 views

Problems MBR and GPT Partitions on a Linux Host on SLPOS

Ive a Host loaded with SLPOS Image from a SLPOS Branch Server (SuSE Linux Point Of Service) and i want to handle this issue, when system boots it download a PXE who does a check of a several checks ...
0
votes
0answers
5 views

videoconferencing/audio-only-conferencing on LAN

The given scenario is an office-building with several floors. Using linux servers and linux clients it is necessary to create a system for videoconferencing or if not possible then audio-only ...
0
votes
1answer
14 views

Dual booting with two drives

So I need to install a microsoft product on one of my drives today sadly. My current setup is so that I have a SSD which has Linux on it. And a 1 TB HDD which just extends my Videos and Documents ...
1
vote
0answers
20 views

Caldera Debian Keyboard Output Chinese Characters

So, I'm an involuntary IT guy at my current position, and we have come across an issue with Caldera's flavor of Debian Linux. For some reason, with no real prompting, our keyboard starting typing ...
1
vote
1answer
17 views

Help about CentOS 7 apps & Driver [closed]

I'm using pc for several years but never tried Linux so I'm quite noob in this field. I'm using Autodesk maya, Nuke & will learn houdini very soon. I found that linux works faster for this apps so ...
2
votes
1answer
31 views

Can one core on a multicore linux system be dedicated to one user-space app?

Can a core be dedicated to one user-space app (e.g. for the purpose of bit-banging GPIO without any interruptions)?
3
votes
1answer
45 views

Prevent a lot of brute force attacks on Exim2

Some people or computers have been trying to log in a lot of times on my Linux DirectAdmin server over the last few days. I am receiving a lot of messages of brute force attacks for Exim2 in ...
1
vote
1answer
21 views

problem with upstart

Hi i got always an error message that my upstart script doesnt start. start: Job failed to start My script is: description "Tagger Version 2" start on runlevel [2345] stop on runlevel [!2345] ...
0
votes
1answer
27 views

what does mean by HardwareCorrupted, DirectMap4k, DirectMap2M fields in “/proc/meminfo” file of Linux?

I am looking for description of following terms: HardwareCorrupted, DirectMap4k, DirectMap2M fields in "/proc/meminfo" file of Linux. I could find the following description for the fields from ...
1
vote
4answers
75 views

How to stop minute cron job?

I have a program written in python; my program scrapes a value from some financial website every minute and pushes that value into my DB. My program takes like 1 or maximum 1.5 seconds to do this ...
0
votes
0answers
23 views

Failed to execute the iscsiadm commands

When I am using the command: iscsiadm -m discoverydb -t st -p 10.10.11.12:3260 -I be2iscsi.00:17:a4:7a:e3:34.ipv4.0 --discover -P 1 I am getting below error: scsi host1: BC_207 : MBX Cmd Failed ...
1
vote
1answer
32 views

Where is routing table stored internally in the Linux kernel?

When I execute route -n, from where exactly (from which structs) is the information displayed retrieved? I tried executing strace route -n but I didn't help me finding the right place it's stored.
0
votes
0answers
17 views

/proc/diskstats and iostat are right? strange values on my test

My question is quite simple.. I am doing some tests to confirm the perfect work of both (diskstats and iostat) disk meters and something is wrong here. I write this command on cmd and I get the ...
1
vote
1answer
49 views

Writing openSUSE image to SD card

I am releatively new to linux and I have assembled a raspberry PI 2 model B and I'm relavively unexperience with linux. I have tinkered in the past with SUSE and want to start doing it again. I have ...
0
votes
1answer
15 views

#puppet apply site.pp gives below error on cent 6.4 [closed]

Could not find default node or by name with 'puppet-master.example.com, puppet-master.example, puppet-master' on node puppet-master.example.com
-2
votes
0answers
12 views

coonection time out after #puppet agent test

after executing following command puppet agent --test o/p Unable to fetch my node definition, but the agent run will continue: Warning:Connection timed out - connect(2) Info:Retrieving pluginfacts ...
0
votes
0answers
6 views

/var/lib/puppet/state/agent_catalog_run.lock exists

after executing following command on centos 6.4 m getting below error puppet agent --test o/p: Run of Puppet configuration client already in progress; skipping ...
2
votes
1answer
30 views

Is it possible to mask a file with a different one?

I'm trying to solve the problem that I have two OS (Windows 7/Debian) which I want to enable to share certain data from lets say Firefox/Iceweasel. My Setup Basically there's profile folder A on an ...
1
vote
1answer
22 views

Open Java programs of a linux machine on Windows with SSH?

I usually use laptop (which has Windows) to ssh to my Linux server and run stuff on it (e.g. Intellij, MATLAB). I wonder if there anyway to open Java programs (again, like Intellij) of a remote ...
0
votes
2answers
28 views

X Windows special programs: do some of these still exist?

I recall that X11 provided a number of "fun" programs accessible via unix. For instance, if you use the command xeyes, an interface will pop up of cartoon-like eyes which follow your cursor ...
1
vote
0answers
33 views

Grub package configuration error on each and any software update

Sometimes ago I had to restore Linux boot after Lenovo (v580 laptop) Windows 8 system recovery button pressing (just a stupid mistake). I followed this guide then ...
0
votes
0answers
11 views

Exporting parent directory to RHEL boxes

Is it possible to export the parent directory to the RHEL boxes where sub directories of the parent directory is already exported. Source-AIX machine Destination-RHEL machine e.g /usr/atc/abc already ...
1
vote
1answer
18 views

RHEL not booting with the updated kernel after upgrade [closed]

We have recently upgraded RHEL boxes, but the system only booted with the old kernel. Observation is that there is no link /etc/grub.conf to /boot/grub/grub.conf. Now, to boot the system with the new ...
1
vote
1answer
38 views

Who are the Linux Memory “subsystem” developers?

After an hour of googling, I still cannot find Linux Memory subsystem developers contact e-mail. Question: Where is the webpage that shows who develops the Linux kernel, specifically the Memory ...
-1
votes
0answers
11 views

Where to find rescan-scsi-bus.sh in linux os

I can't find the rescan-scsi-bus.sh. I installed yum install sg3_utils. Where to find this file? I checked in /usr/bin/rescan-scsi-bus.sh but i didn't found it.
1
vote
0answers
14 views

Windows file shares dissapear erratically in Linux file browser

My network consists of a router which acts as a dhcp server. Connected to one of its ethernet ports is a unmanaged switch which in turn has all my machines connected to it via ethernet. On this ...
2
votes
2answers
42 views

bash + how to define array variable with instance number

Is it possible to define variable that is called for example machine1 as machine$counter ( while counter=1 ) ? For example, I created the /tmp/config.txt file and set the machine1 as array: $ more ...
0
votes
0answers
24 views

Echo n-values for 1 key in ansible?

I have an ansible var : site1: - name: myName value1: something1 value2: apple value3: 14 ... valuen: "a submarine" So the point is, that I don't know how many values are ...