3
votes
2answers
335 views

Time running a Ruby script is different locally than over SSH

Has anyone else seen this behavior? I created a simple Ruby script for giggles to see how fast it would count up on a couple machines I have. Here's the source: for n in 1...1000000 do ...
3
votes
2answers
713 views

Bash parameter expansion - greedy versus non-greedy

It's a bit of a contrived example but here goes: Say I have a variable 1.2.3.4 containing version information and need to replace the .4 at the end with .5 version=1.2.3.4 echo ${version%.*}.5 ...
1
vote
2answers
418 views

Ubuntu plus whonix

I have a dual boot Ubuntu 12.04 and Windows 7 Professionl 32 bit. Is it possible to install Whonix OS inside of Ubuntu? Or.. LXDE OS inside Ubuntu? Any suggestions are welcome.
5
votes
2answers
15k views

Cannot start xterm over ssh after several successes

I am running some MATLAB scripts on the command-line of a remote computer using ssh. These scripts launch 5 xterms that are forwarded to me via ssh (using the -X option). At the moment I am debugging ...
4
votes
2answers
222 views

Inconsistencies between redirecting input from file, here docs, and here strings

Why is this inconsistent? I would expect here docs and here strings to be functionally equivalent to redirecting input from a file. $ bash --version GNU bash, version 4.1.2(1)-release ...
17
votes
6answers
14k views

Can root/superuser read my read-protected files?

On shared unix hosting, if I have a file sensitive-data.txt and I issue: chmod 600 sensitive-data.txt Can root user still read my file? Specifically I'm wondering if it's safe to store my password ...
0
votes
1answer
6k views

How can I run reboot as a normal user without needing to enter a password? [duplicate]

My goal is to use reboot as myusername without entering a password. How can I achieve this? I have read Allowing a user to use sudo without a password and followed the suggestions but it still ...
3
votes
2answers
13k views

sed: substitute text with a string that contains special characters

I have a lot of text file with specific tag called "Comment", example I have a file called 3dchess.sh, I need change the tag: Comment=3D chess for X11 to Comment='<span ...
4
votes
2answers
163 views

Can I use variables inside {} expansion without `eval`?

Can I use variables inside {} expansion without appealing to eval? If so, how? This doesn't work: $ touch 1.foo 1.bar $ ls 1.{foo,bar} 1.bar 1.foo $ extensions=foo,bar $ ls 1.{$extensions} ls: ...
0
votes
1answer
323 views

APF firewall & IPset

Due to too many hack attempts from spam countries, today got the server configured with IPset for iptables. I loaded thousands of ip range in IPset & then added it to iptables with this command ...
3
votes
1answer
254 views

CPU Frequency changing every second

I just installed conky and recognized that my CPU-Frequency changes every second in steps of 10 to 100MHz and between 1000MHz - 2000MHz. Just wondered if this is normal behavior?
1
vote
2answers
2k views

Blacklisting won't work for kernel module “radeon”

I tried to blacklist kernel module "radeon" as it is classhing with my propietary drivers. I tried it doing it in two ways but none of them worked and every time command mkinitcpio -M will list ...
1
vote
2answers
315 views

free video editing software for Linux with audio tracks auto matching

I have a few video files which basically cover the same action from different perspectives. I would like to merge them into one "split-screen" kind of video (two or four panes). The problem is videos ...
1
vote
1answer
767 views

Debian Squeeze RAID 5 Install?

I have a box with four Hard Drives on it. I am going to install Debian Squeeze (I know it's old... I have to) on it. I want to be able to treat the the four Hard Drives as a single Harddrive. Durringt ...
2
votes
1answer
3k views

Nginx not available from localhost, but available by network

Have server with installed nginx and php-fpm. Some sctript need access to part of site via curl. But it fails. I tried to run curl on server : curl -v -i alexcoder.info * About to connect() to ...
0
votes
1answer
684 views

Broken libglib on debian 6

So, some time ago I wanted to update mpd from 1.5 to 1.6 which required a newer version of libglib( >= 2.31.8) on amd64, so I compiled them from source as I was on debian oldstable and couldn't find ...
3
votes
1answer
1k views

How to let a user execute a script owned by root? Setuid doesn't seem to work anymore [duplicate]

I have some bash scripts that I use with the user 'root' to manage iptable rules. The problem is that I want these things at the same time: The script must be owned by root Permissions must be 700 ...
10
votes
1answer
14k views

How to get back from “testing” to “stable” - Kernel downgrade

currently I am having lot's of fun with apt-get - and the bad thing is, it was my own fault. I had enabled the testing packages in /etc/apt/sources.list to install a certain package. And I told my ...
1
vote
1answer
51 views

Why does SLES 11 corrupts given characters?

If I open a notepad and copy this from it: aña, to a file opened with vi on the machine, I get this: aña My question: Why? What could the problem be? Logfiles on the server has the same ...
3
votes
1answer
189 views

uname shows duplicate architecture

Why does uname show x86_64 three times? This is Ubuntu 12.04.4. $ uname -a Linux seedbox 3.2.0-59-generic #90-Ubuntu SMP Tue Jan 7 22:43:51 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux
2
votes
1answer
364 views

How do I know that my virtual guest is using VT-x?

I know my cpu supports VT-x, but how can I check that the KVM guest machine uses it? My Desktop is CentOS running a Windows 7 guest. I'm asking because.. the virtual Windows 7 says I'm using a XEON ...
1
vote
1answer
565 views

bash control statment for when an option flag is used

I trying to make control statement to check on a option flag is used or not? For -o output.file if is used I would like to make equal to variable OUTPUTSUM = OUTPUTFILE and if there no -o option use ...
2
votes
1answer
2k views

Connect to pseudoterminal (same user) from lost session [duplicate]

I was running several large processes at once, and my PC froze (I suspect due to heat, its a laptop, and the fan was at maximum for several minutes just prior to locking up). The mouse cursor moved, ...
0
votes
2answers
2k views

Installing AMD Radeon HD 7400M series fedora 20

I just installed fedora 20 on my second pc and its running pretty hot, I found a driver on the site http://support.amd.com/en-us/download/desktop?os=Linux%20x86_64. i unpacked it and i tried sudo sh ...
6
votes
2answers
3k views

Replace string with sequential index

Can someone suggest an elegant way to accomplish this? Input: test instant () test instant () ... test instant () //total 1000 lines output should be: test instant1 () test ...
1
vote
0answers
63 views

What are the linux kernel versions incompatibilities with btrfs?

I read that usage of a btrfs volume with a newer kernel can render it unreadable when that same volume is used with an older kernel. I have a mobile storage device that will be used by different linux ...
4
votes
1answer
151 views

Is there a way to cat files as they are created? [duplicate]

Unlike the answer to this question (Can a bash script be hooked to a file?) I want to be able to see content of files that haven't been created yet as or after they are created. I don't know when ...
0
votes
0answers
152 views

How to start multiple login managers on different ttys?

How i can configure (best if its a "slim" or "gdm") login manger to start on different ttys? I want a 1 login manger on tty6, another on tty7 and next one on tty8 accessible independently. Is it ...
3
votes
1answer
2k views

How to set laptop screen brightness just after boot with full disk encryption

my girlfriend bought Lenovo Essential G500 i5-3230 and I installed Linux Mint 16 on it with full disk encryption. It is standard installation with encryption using dmcrypt and LUKS. But there is a ...
58
votes
6answers
99k views

Find where inodes are being used

So I received a warning from our monitoring system on one of our boxes that the number of free inodes on a filesystem was getting low. df -i output shows this: Filesystem Inodes IUsed ...
1
vote
1answer
185 views

Cannot exit terminal emulator

I have a very strange and intermittent problem. Sometimes, with no pattern I can discern, running exit fails to close my terminal emulator. In the screencast below, I open the first terminal and ...
2
votes
0answers
483 views

Vagrant-lxc container not starting

Firstly I'd like to say that I'm new to LXC and I may have some problems getting the right idea of how the things should work. The thing is I'm trying to start a previously download vagrant-lxc box ...
0
votes
0answers
1k views

Set Up New Locale On CentOS 6

I am trying to set up a new locale for my centos server environment. Here is currently shows for locale -a command: en_AG en_AG.utf8 en_AU en_AU.iso88591 en_AU.utf8 en_BW en_BW.iso88591 en_BW.utf8 ...
0
votes
0answers
108 views

What's up with “Error in lockf()” just for one particular user?

We're running a Java manufacturing/equipment control application on Solaris. Equipment control is done via the serial port on the SunRay terminal at the user station. The interesting thing is that ...
4
votes
1answer
5k views

How to get the list of all active X sessions and owners of them

I'm implementing USB plug/unplug notification (here's related question), and I need to execute something like notify-send "device plugged" "My Device Title". The problem is that to make this command ...
3
votes
2answers
2k views

Are limits in linux (like those controlled by ulimit or /etc/security/limits.conf) per user or per user per process?

I saw three copies of a process running and one of them cored in what seems like memory issue. Each individually occupies about 3-4 GB of memory..would a limit account for killing one of them? And if ...
1
vote
1answer
752 views

Open program in another terminal window windows-solaris

I am running Attachmate Reflection for UNIX and logging into my Solaris system. I then want to open a file with nedit but I get an error: NEdit: Can't open display So, I type in xhost + and ...
1
vote
2answers
316 views

How to notice log file changes with Linux standard tools? [duplicate]

I need something that does not need to be installed. It's on an embedded system with very little space on the HD. I can't instal anything. I need to do it with something that is already included. I ...
2
votes
1answer
2k views

Configuring Vim with clientserver and clipboard

On OS X I have vim working just fine from homebrew. The default homebrew install compiles vim with these flags. ./configure --prefix=/usr/local --mandir=/usr/local/Cellar/vim/7.4.161/share/man ...
1
vote
2answers
3k views

How do I get emacs on a newly installed Fedora 20 system?

I have upgraded from Linux Fedora 12 to Fedora 20 by buying a new computer, and the shop has kindly installed Linux for me from the DVD I bought for the purpose. I assume he did the most basic ...
0
votes
0answers
356 views

Stuck at Grub command line after boot repair

After updating Windows 8 to Windows 8.1 I lost access to Grub and my Linux Partition (running Elementary OS) so I tried using boot repair from a Live USB and now I can't access either. It drops me out ...
1
vote
1answer
164 views

Debian, nonroot, cron, bash script and rebooting at specific time

As nonroot user, how can I schedule a reboot every day at 4:30am? 30 04 * * * /home/user/scripts/reboot.sh As a nonroot normal user, I'm sure the system won't allow me to use the reboot command. ...
1
vote
1answer
82 views

Who is setting http_proxy?

On an Ubuntu system with bash as the default shell for the interested user, the http_proxy environment variable is set to a specific value in a fresh GNOME Terminal. The .bashrc file for this user ...
7
votes
2answers
2k views

Can zsh access the stdout of last run program?

I often use find or locate to find out about paths. (~) locate foobar.mmpz /home/progo/lmms/projects/foobar.mmpz The next step is often to open or otherwise manipulate the files. In a happy case ...
1
vote
1answer
112 views

Program for making a complete ISO-image of damaged DVD by multiple readings? [duplicate]

I'm looking for a program that (tries to) makes a complete ISD-image of a damaged DVD or CD. This is (AFAIK) done by reading the damged media time and time again, until the program is able to put ...
0
votes
1answer
543 views

Unable to extend desktop with USB display adapter and libdlo

Anyone familiar with using libdlo for DisplayLink's USB display adapters? I've followed the instruction steps from README file of libdlo Install a compatible libusb version (0.13) $ ./configure ...
1
vote
2answers
259 views

Emacs temp dot hash file don't exist

I use find | xargs grep a lot when working on large source code and when I didn't save a file in Emacs it creates .#SomeFile and grep give error that there's not such file (I'm not including because ...
3
votes
4answers
3k views

running kernel on QEMU

I face this message: Failed to execute /initKernel panic - not syncing: no init found. Try passing init=option to kernel. I am using this command line: qemu-system-x86_64 -hda disk.img -kernel ...
1
vote
3answers
2k views

removing spaces from first column

My input file has positions in first column with different number of spaces (or no space) 16504 16516 1650811 16520 1651 16524 16516111 16528 165204 16532 ...
8
votes
2answers
42k views

How to send data to a serial port and see any answer?

On Linux, I want to send a command string (i.e. some data) to a serial port (containing control characters), and listen to the response (which also usually might contain control characters). How can ...

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