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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29 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 ...
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57 views

bash script loses readonly value after first time thru loop

I have a bash script which seems to lose the value of the readonly constant after the first time thru the for-in loop. For example: #!/bin/bash readonly DIR="./groups/" for output in "${array[@]}" do ...
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98 views

Roundcube Web Mail client to hide folders

Roundcube web mail client works perfectly. But the problem is that I want to hide INBOX subfolders (they are without content) globally. There are separate folders which are used and they are with ...
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45 views

Why does Android crash when stressed on Memory where as GNU-Linux keeps running?

I have two devices, an Android phone with an eGlibC stack running side by side with Bionic, and an old HP tower with Debian. My HP tower has 512 MB of RAM. My phone has 2GB of RAM. I run top on ...
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20 views

Can't execute server messages outputed when printing to laser 3 on openSUSE

This is my 1st post and I have a sporadic printing issue I'm needing some help with. I have 3 laser printers setup on my secure network; all ping on different IP addresses; 2 of which are printing ...
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67 views

Creating multiple proxies on a single VPS

I am trying to create SOCKS Proxies on my Debian Linux VPS. I was just wondering what is the best way to go about doing this? I have tried things like Dante and it doesn't support multiple Proxies.
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33 views

Could I disable ext4's journaling safely in BBWC?

I knew set "nobarrier" flag is safe in BBWC when using ext4,but since "nobarrier" flag couldn't ensure proper order of journal logging and data flushing,then it seems journaling is useless。So is it ...
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29 views

sslserver using 100% cpu

I've a qmail setup with sslserver being used to secure the pop connections. Normally it runs very well, however some instances of sslserver start taking 100% cpu and its child process qmail-pop3d ...
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117 views

Debian disables IRQs

It's been two days that my Debian Wheezy 7 randomly disables IRQs apparently with no reason. After the IRQs are disables, I'm unable to mount hard disks and I have to reboot. This is the output of ...
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131 views

Mint: locale problem

When compiling a java application, I got an issue with some characters that are encoded in ISO-8859-1. On my machine I am using UTF-8. How can I change temporarily the locale so compilation goes fine? ...
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116 views

Cannot connect to wired ethernet after hibernate

When I am at home I use wired connection on my laptop and it works fine. Then I put it to hibernate with sudo pm-hibernate and start it up again when I am work. I am not able to connect to internet ...
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108 views

How to create virtual serial port?

Is there a common way (tool?) to create two serial ports through physical /dev/ttyS0? I have to simultaneously use both to communicate. I've seen 'Socat' but I can't understand how can I use it just ...
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398 views

no internet connection (wireless or wired) on ubuntu 12.04

I have win7 and ubuntu 12.04 on dell inspiron 1545 with Dell Wireless 1397 WLAN MiniCard. wireless works fine on windows, but I cannot connect with ubuntu. when I tried connect with a cable - it said ...
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83 views

SLES 10 SP4 - how to get specific kernel source?

I want to look at the kernel source for some specific kernel versions on SLES 10 SP4. I don't want to see just the Linux kernel source, but the one SLES is actually running. Suppose I wanted to get ...
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88 views

inotify does not work with linux kernel 3.4.11

I have a Linux running with kernel 3.4.11. I tried to run inotify-tools, but it does not work (in fact it does not detect the file changes). I checked the .config file of Linux kernel and I found ...
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41 views

Internal secondary hard disk suddenly failing to mount

In RHEL5, my internal secondary hard disk (1TB) suddenly fails to mount after some unexpected power failure and after my system got off. But it's showing in BIOS and while Booting checking as sdb ...
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103 views

Understanding Mixing of sounds in ALSA

I can't seem to bend ALSA completely to my will, even after I spent a lot of time configuring it. I just do not seem to understand it well enough. Here is my /etc/asound.conf: pcm.dmixed { ...
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141 views

vdsm service won't start

I am currently evaluating Red Hat Enterprise Virtualization and have managed to set up the management server and the bare metal hypervisor. Now I'm trying to add a regular box running RHEL server 6.5 ...
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85 views

Canon MF4550d refuses to print from Linux server

We have several Canon mf4550d printers at the office directly connected to Windows 7 machines. I need to print from a Linux server to those printers. I have installed the latest drivers for my model ...
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150 views

Mail Delivery too slow with sendmail

We are using javamail to deliver mail for our applications. The mail function runs in a loop to deliver around 100 to 200 mails depending on the range we use. However, it taking more than an hour to ...
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24 views

lost packets using traceroute

using mytraceroute I see 50% of ICMP echo request lost: 192.168.1.212 is internal server while 192.168.5.1 is my router: Host Loss% Snt Last Avg ...
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2k views

minicom showing offline

I am trying to use minicom in Ubuntu. To do this I first connect my USB to DB9 converter, then I type this command on terminal dmesg | grep tty to check if my USB to DB9 converter is connected ...
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36 views

CLI Video Driver for Ubuntu 10.04

I am running a Linaro Arm version of Ubuntu 10.04. I switched the runlevel to 1 which should be command line with no GUI but I am however being presented with a black screen with a blinking cursor on ...
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232 views

Debian wheezy FN key inverted after resume from suspend

I have debian wheezy installed on my new laptop (Toshiba Satellite L70), with Kernel 3.14 from backports. After I resume from suspend, all function keys (F1 - F12) behaviour is inverted, for example, ...
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123 views

Root able to login but non root users are denied - PAM

One of our servers is not letting non-root users login, but root can login without any issues. The following are the messages from /var/log/secure: Jun 24 18:08:43 jonnserver sshd[14470]: debug1: ...
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44 views

NFS Automount/HARD mount sharing top directory

In Linux, is it possible to "hard mount" a directory under an automounted directory? For example: /top_dir/fred (automounted) /top_dir/jane (automounted) /top_dir/software (hard mounted) ...
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57 views

Start Netbeans as super user as a shortcut with password embedded

For my work purposes, I need to start netbeans in super user mode. I find it quite irritating to have to type this : su then enter the password ./netbeans everytime I want to start netbeans. How ...
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22 views

The Case of the Conflicting Bootloaders

A server with a 2-disk RAID array (mirrored) is serviced by a 4-port 3Ware controller. Recently it became inaccessible after a restart. At the console it asked for the runlevel. Indeed, the /etc ...
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96 views

i3 HDMI output sometimes shows black screen after startup

I have the i3 window manager configured to use HDMI-0 as its main output and DVI-0 to use as a secondary screen. The dualscreen configuration is done via an xrandr entry in the i3 config file. ...
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51 views

DNS server design

Currently my company is deploying SIP phones in different locations from different boroughs. I've been asked to create static DNS records for each of the phones with the following format: ...
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82 views

Installing ZeroMQ for PHP on Hostmonster

I'm working on the shared hosted solution from Hostmonster. I'm trying to get ZeroMQ installed so that it will work with Ratchet. I have configured and build ZeroMQ 4.0.4 locally, as well as libzmq. ...
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10 views

How to disable the “medium” style for every font using the fonts.conf file?

I would like to disable the "medium" style for every font installed in my computer. I've searched the specific settings for the file fonts.conf but I couldn't find it. Any idea?.
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292 views

Streaming video with VLC / WinTV has no audio

I'm trying to stream video between two PCs with a WinTV card. I can stream video, but the stream contains no audio. # lspci -v: 06:04.0 Multimedia video controller: Brooktree Corporation Bt878 Video ...
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91 views

Nvidia Update Problem On Debian 7 Stable

New User Here Guys bear with me! Specs: Debian Stable Weezy Gnome 3 edition 64 bit Video Card: Nvidia GTS 250, CPU: AMD Phenon X4 Quad core History: All was going so well, back-ports was added, ...
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30 views

How to add entries in GPT/ guid table without booting in is?

I foolishly deleted entries from guid or gpt table while messing up with gdisk utility, As a result no bootable partition shows up on startup ! I'm stuck at blank screen please help ! How shoul I ...
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22 views

Is it possible to install RHEV on el6 clustered computer

Is it possible to use Linux (el6) clustered computer can be used as a hypervisor for RHEV 3.3/Ovirt 3.3? Cause, we can not combine RAM/CPU from two or more hypervisores to be considered as a one ...
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55 views

Copy and Paste between two guests in RHEV and/or VMware ESXi, is possible?

I do have two different setup: setup is with RHEV 3.3 and setup with VMware ESXi Is it possible to copy and paste between the two assigned guests to user, one guest is of Windows 7 and another ...
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252 views

What problems to expect when running Docker with libcontainer and lxc on the same host?

Simple question. Can I use the lxc userland tools and docker with its new "native" libcontainer in parallel on the same host? I can see how for some scenarios I could benefit from the docker way of ...
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30 views

'Refresh-save' a file, dock problem?

A bit of context: I followed the bug reports on Docky (link1, link2, and all the other links in these links...) and managed to make Plank recognize IntelliJ IDEA using the right StartupWMClass on the ...
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107 views

Specific Jar file doesn't run on startup

I want to run a jar at startup, so I asked a question here. I was given a few suggestions, so I started from trying to create a script file and desktop file. I created a script file and desktop file ...
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40 views

My Red Hat 6.4 goes once more in sleep after wake up

When I wake up my Red Hat 6.4 desktop it goes into sleep mode once again and when I restart my machine it never restarts again, after a shutdown just the LED lights are on so in this case I have to ...
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107 views

Centos 6.5 laptop with multiple KVM on roaming networks

I have Laptop with CentOS 6.5 with 16GB RAM and many KVMs are created for testing purpose. Situation is I have to move from site to site, and due to that physically connected network eth0 to Host ...
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115 views

RHEL & SUSE 2014 CPU & storage benchmarking tools

I have hundreds of Linux servers that we need to benchmark the CPU & Storage on. RAM & Networking would also be good. If possible I would to avoid installing a large suite, but not totally ...
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720 views

Kernel 3.14.1 compilation errors

I installed the kernel 3.14.1 and there seem to be no issues. uname -r 3.14.1-031401-generic However, when I try to go to the folder and try to do a make it fails. I see that multiple files are ...
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45 views

Spamassassin blacklist_subject not translating UTF8 characters

I am using spamassassin version 3.3.1 in conjunction with amavisd on Centos 6.5 64bit. It appears that when I use the whitelist subject plugin (actually using it to blacklist subjects, ie ...
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117 views

Extremely slow CD-ROM burning

When I try to burn a CD-ROM using K3B, the burner slows down from 10x to 0.12x after writing exactly 71MB. Consequently, burning a 142MB live CD takes more than a hour. Why is this happening? The ...
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795 views

Archive (Compress) giant folder in Linux using command line without termination

Well, I'm just trying to compress a whole directory (infact giant!) under Linux using a terminal. The entire folder size is about 7 GB. I've used below command to create the archive. tar -zcvf ...
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365 views

PHP mail() and Debian Wheezy Not Working

I am currently running my on debian wheezy with php5 installed. I was trying use the mail() function, and I realised that I will require a MTA/exim installed before it will be possible because the ...
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31 views

If a buggy application underperforms, it it possible server tuning could have no affect?

To set the stage, imagine if you will: A read-heavy Tomcat Application with MySQL on Red Hat Enterprise Linux with some problematic Java Class files which resulted in the application performing a ...
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102 views

Fedora: dmidecode VS lscpu - different CPU reports

When it comes to retrieving CPU information via the Terminal, I'm getting a different output from dmidecode --type 4 than I am from lscpu. I've included the relevant output below. For the sake of ...