Linux refers to the family of Unix-like computer operating systems using the Linux kernel. If your question is about a certain distribution only, use a more specific tag.

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Ubuntu 15.04 (Vivid) is so slow at startup

My laptop is Dell Inspiron N4050 that its RAM was upgraded to 8 GB. I have dual boot OS (Win8 and Ubuntu). My laptop is so slow when booting from Ubuntu It takes about 2 minutes but Win8 will boot at ...
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Run qemu on separate tty (and X server?)

Is it possible to start a VM on a separate tty automatically, so I can switch between the host and guest through ctrl-alt-F{1,2}? I know I can start an X session manually, but I'd like to automate ...
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disabling password dictionary checks while keeping minimum length check in linux

In RHEL 7, password policies are controlled by pwquality.conf and pam_pwquality.so. I want to disable dictionary checking but keeping the minimum password length to 8 characters. If I remove ...
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2answers
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Emergency console with xen

On gandi or other providers, you can activate an emergency console to your VM. It binds a ssh channel to a temporary IP and port. I have my own server running on xen. I would like to implement an ...
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2answers
32 views

Fast way to download many small webpages?

I need to download lots of small pages as fast as possible. Average size for one page is 3kb. There are millions of pages. First, I tried curl but it was way too slow, probably because it was waiting ...
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1answer
22 views

Get max IO performance from the storage system

I am asked to measure the max IO supported by a PCI flash based storage system using FIO utility. I have also been asked to configure/fine tune the system so that I get max storage performance. My ...
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13 views

Setting default group permissions via SFTP

I am setting up a file server where users log in via SFTP. I want all users to have the same permissions to read and write any file. Since they all have different accounts with different passwords, i ...
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1answer
26 views

Replace highlighting characters with something else

I wish to replace color codes with something else. For example, running cal command i want to get some html tags instead of color codes: July 2015 Su Mo Tu We Th Fr Sa 1 2 ...
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7 views

Installing a systemd service from an RPM?

I've been creating RPMS (using CMake's CPack) which install everything into /opt, and then the postinstall script copies the service definition files to /etc/systemd/system. I've toyed around with ...
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9 views

recommend single source (book) explaining modern linux boot process for sysadmins [on hold]

If this isn't the right forum for my question, please point me to the right place. I'm an experienced Linux sysadmin. I'm very familiar with the older style boot process - MBR, grub, initrd - but I'm ...
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1answer
12 views

/bin/bash -c stopping counting with date

/bin/bash -c not starting counting with date: /bin/bash -c "while true; do echo [`date +'%F%t%T%t%Z'`] Keep Alive; sleep 1; done" The output is: [2015-07-06 13:44:36 UTC] Keep Alive [2015-07-06 ...
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1answer
16 views

Booting a USB from the Grub command prompt

I have a USB drive that I know is bootable (tested it on a different PC), but because of an ancient BIOS, I am unable to set it as a boot device in the BIOS settings. The computer I am using has GRUB ...
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9 views

create tunnel in order to access https via port 443

I have Windows machine that connected to Linux server 192.9.100.10 And Linux server has connectivity to the IBM blade center management GUI - 192.9.100.200 From my Windows machine I do not have ...
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2answers
42 views

How can i bypass/protect myself from ransomware like ctb-locker?

Recently while using my system for testing I got my machine infected with a malware, My system gets displayed with the following screen : While browsing internet with screenshot i found that its ...
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25 views

windows and linux virtual machine software

I want to run some simulation software (with Oculus Rift support) on windows as the main OS, and have it talk to software that is built for Raspberry Pi / Arch Linux/Arch Linux ARM (but no windows ...
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5 views

How to redirect, ignoring path in url.com/path/path

In dnsmasq.conf, I redirect any domain url to an IP. If I enter "url.com/path/path", I get redirected to "IP/path/path". How can I redirect to IP only ? // NB : If I manage to work it out, I guess ...
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1answer
16 views

Service to restart (safely, then if that fails, forcefully) a few different processes on a schedule

I'm currently running a personal project that basically monitors a few things around the clock. One is a process that uses PhantomJS, and the other scans some other APIs, and sends emails if some ...
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1answer
11 views

Downgrade SVN repository client

For some network speed reasons, I uploaded a .tar.gz copy of a checked out svn project on the server from a dev environment, but I ended with the version issues. The final server had lower version of ...
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10 views

how to install freeCWMP in linux platform

i need compete detail to install FreeCWMP in Linux platform that has Openwrt.i am not getting from where to start only.so please if you share the detail step i can go through that
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1answer
17 views

From IpTables NAT/DNAT redirections, how to display a domain.com url in browser?

Status : - My machine : linux debian-based (cube-shaped), acting like a router - I redirect all incoming traffic to its router IP 2.20.200.1 Problem: However, the url/ip hit by the client (that ...
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11 views

How to autorun a C# mono applications on Raspberry PI startup?

I've a Raspberry PI: Raspbian and I'm connecting to it through RDP or SSH. And I've 2 applications in C# and I run them through mono. One is WinForms (GUI app - cannot be launcher through SSH requires ...
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current disk space status from multiple unix server [migrated]

I am trying to get the details of disk space from around 100 unix server. All servers required different credential to access. This is the script I have found. for i in <server list> do echo ...
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1answer
17 views

Custom command not working

In my Ubuntu I tried to create a custom command: I added a bash script named ns3 in /usr/bin #!/bin/bash cd ns3/ns3-allinone-3.19/ns-3.19 I made it executable chmod +x ns3 Still it doesn't ...
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1answer
14 views

MediaWiki extension hiding in LibreOffice?

I always used LibreOffice to write my MediaWiki-articles and saved it as MediaWiki .txt-file to use it on our Wiki. Since I upgraded my PC, I have the new LibreOffice 4.4.2.2, where it appears the ...
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5 views

linux translate-shell -play command not working

I am new to linux and just installed translate-shell on Ubunutu 14.04 distr. If I run a translation, for example 'trans -p hello', I get the following error: [Warning] No avaible audio player or ...
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2answers
20 views

NAT iptables : why wrong/empty destination in saved config?

Here is rules I put in iptables : $ iptables -t nat -A PREROUTING -i wlan0 -p tcp --dport 80 -j DNAT --to-destination 19.11.11.1:80 $ iptables -t nat -A POSTROUTING -j MASQUERADE ...
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1answer
12 views

samba shared folder and mounted disk

Technically I only want to setup a samba shared folder. Situation: With CentOS7 and samba I can successfully setup a shared folder but even if I change the create and directory mask, the read only ...
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1answer
32 views

application that uses xforwarding fails unless I use xhost +localhost

I'm connected to a remote system over nomachine enterprise. We use an internal application that I believe is essentially xforwarded from another machine as I run it - it runs there, and outputs the ...
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20 views

Kali Linux update error

When I try to update my kali linux whit the command apt-get update I get 3 errors: Err http://http.kali.org/wheezy/main amd64 Packages 404 Not Found Err http://http.kali.org/wheezy/contrib amd64 ...
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13 views

Why is my US English keyboard re-mapped to Swedish in MonoDevelop?

I am using Wine to run MonoDevelop and Unity in openSuSE and it works rather well. However, I have a snag where in MonoDevelop, my keyboard is mapped to use Swedish keyboard layout rather than my ...
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1answer
39 views

How to display byte sizes with binary prefixes?

For as long as I can remember, Microsoft DOS and Windows have been displaying byte sizes with decimal prefixes, instead of binary prefixes. This has plagued at least two generations of computer users ...
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Linux on Mac with bootcamp already containing Windows

I have a MacBook pro retina. I have installed Windows using Bootcamp (no virtualization). Can I further use Bootcamp to also install Linux (Ubuntu)? Or, does the fact that my bootcamp hosts Windows ...
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16 views

diagnosing random power failures and failures to POST

I have a laptop (Toshiba satellite C650), over the last year it has symptomatically been starting to display some rather peculiar failure behavior, some of the more peculiar behaviors follow: it ...
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1answer
32 views

Install GDrive on Seagate Central Linux

Is there a way to install Google Drive for MontaVista Linux 6? I have Seagate Central NAS and it does not have option to sync with GDrive through the standard interface. It has embedded Linux ...
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24 views

OpenVPN starts from CLI but not using “service” or on boot

I've set up an OpenVPN server (loosely following this tutorial) I can start the service using sudo /etc/init.d/openvpn start but if I use sudo service openvpn start I get the following error: ...
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1answer
14 views

How to copy music collection to Windows Phone 8 from Linux

So I recently received a Lumia 520. How can I install music from my existing collection to Windows Phone? Difficulty level: I don't have a Windows "host" for it. I've got Fedora Linux on my laptop. ...
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Asciio on Ubuntu, can't find export as .txt

I just downloaded Asciio to my workstation running Ubuntu 14.04. I created a pretty complex piece of ascii code in order to put as part of the documentation inside my code. I can save files and open ...
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40 views

Can not bypass MAC address filtering

I add a white list filter by mistake to my wifi modem router, so I want to change MAC address to that IP. I run this command: ifconfig wlan0 down ifconfig wlan0 hw ether xx:xx:xx:xx:xx:xx ifconfig ...
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30 views

Shell script for getting video fps

I'm trying using ffmpeg to get the fps of a video and save the value as a variable using this vid_fps=$(ffmpeg -i "$vid_file" 2>&1 | sed -n "s/.*, \(.*\) fp.*/\1/p") echo "$vid_fps" but ...
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1answer
13 views

connecting to host running ssh2 server using ssh client

I am trying to connect to a linux host( target_host) running sshd2 using a ssh client( client_host) ;While doing so I converted the pub key of client_host as ssh-keygen -e -f id_rsa.pub > ...
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10 views

What is the difference between monitoring only one host and cloud?

With the cloud computingtechnology is used very extensively, I am very curious about what is is the difference between monitoring only one host and cloud. For example, I can use top or ps command in ...
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2answers
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How can I put my CentOS on public IP so that I can access it WinSCP from home?

I have a centOS system at office and I want to access it from home via WinSCP. I have a static public IP at office. Please help!
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1answer
20 views

How do I export a lxc container?

Is it possible to export a lxc container to another machine? There are some tools like lxc-snap and lxc-clone will those help in exporting to another system? Can I copy paste the rootfs folder or is ...
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1answer
36 views

How to use a SmartTV as second screen over wifi?

If we would like to use a SmartTV as a second screen over wifi using Linux, how could we do it? Is there a way to do this? For my case I'm using a Samsung SmartTV and Ubuntu 14.04 LTS with KDE 4. ...
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9 views

Removing nVidia driver from Fedora causes references to missing file nvidia-tls

I had installed the nVidia driver from rpmfusion-nonfree and it has been working fine for a long time(From fedora 18 I think). But now I wanted to switch to the opensource driver, so I removed the ...
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Debian server management GUI

I have to manage a number of Debian servers (one as the KVM host, and the others as virtual servers for File management, Infrastructure management - DNS, DHCP etc, and finally a Debian based ...
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Kali linux empty desktop

OK so after a long time struggling with the booting problem, I finally started the Linux. But the Desktop is empty. I don't see the bar at the top (Application Places terminal bar). I can only see ...
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1answer
17 views

java -version not working in linux

I have untar the jdk on my Linux machine and I have set the environment variables ie ~/.bash_profile however if i give java -version on terminal I receive the below error. bash: ...
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2answers
20 views

Clone Drive Using Linux DD Command: Send IMG Over SSH Connection

I SSH to a VPN running Ubuntu Linux. To make backup copies of the hard drive, I use the following dd command: sudo dd if=/dev/sda1 of=/home/rick/hdImage-20150704.img It works, however, is there a ...
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“sudo dpkg-reconfigure keyboard-configuration” settings forgotten after reboot

I'm currently running on an Ubuntu 15.04 machine, and I've been attempting to set my Left Caps Lock Key as my Control Key. After following numerous ways of doing this, I've attempted the above ...