1
vote
4answers
7k views

How to round or convert a float value to int with bc? getting: “(standard_in) 1: syntax error”

I will get value like 2743410360.320 and I want value like 2743410360 to a variable. I tried INTValueOfGB=$ echo "($gb+0.5)/1" | bc But I am getting (standard_in) 1: syntax error
2
votes
0answers
397 views

lsusb partially fails, is the problem with the USB bus or with the command?

What does Couldn't get configuration descriptor 0, some information will be missing mean? Did the Host fail to get the descriptor from the device, or the command lsusb failed to fetch that ...
1
vote
0answers
47 views

How to efficiently create (read-only) both a snapshot and a diffshot at the same time?

I use rsync to regularly create snapshots of some directories via PAR="-aP --chmod=a-w --no-owner" # Create diffshot rsync $PAR --compare-dest=$CURRENT_SNAPSHOT $SOURCE/ $DEST.changeset.incomplete ...
1
vote
3answers
3k views

Remove all *.mp4 and *.zip but some files

In one of my programs I call a bash command to remove all files in the directory, but some: bash -c shopt -s extglob shopt -s nullglob rm /path/to/directory/!("file1" | "file2") Which for what I ...
3
votes
1answer
43 views

How to calculate (weighted) majority over columns?

I have two files: the first one contains lines where the first column is an ID, and the remaining columns are votes, e.g. 3242 -1 1 -1 1 1 1 In a first step I want to calculate the majority for ...
15
votes
2answers
108k views

How to recover files I deleted now by running rm *? [duplicate]

By mistake I ran rm * on the current directory where I created many c program files. I had been working on these since morning. Now I can't take out again the time that I spent since morning on ...
4
votes
1answer
811 views

Resize / remount /dev/shm not working

I've got a linux box dedicated to playing host to an Oracle server installation. It's got 4Gb RAM and by default, 50% (2Gb) has been allocated to /dev/shm. I want to change this to 3Gb, but I am ...
4
votes
1answer
601 views

Logging interactive input and output without capturing all typed input and control characters

I am trying to log output from an interactive command-line program; units, specifically. I have tried using tee like this: units | tee units.log or script like this: script -c units units.log ...
2
votes
0answers
1k views

“Kernel panic - not syncing” after building Centos-6/elrepo 3.10.19 kernel from source

I need to rebuild the Centos-6 / elrepo 3.10.19 kernel from source. Background: the GVision touch screen drivers are incompatible with kernels > 3.8 and require source code patches to add code to ...
3
votes
3answers
698 views

sed - how to (not) match unmatched brackets

How can I do my operation only on lines that close their brackets? For example I want to change ".is" lines and add a bracket but not for lines with unclosed brackets. so these are changed ...
5
votes
3answers
187 views

Robustly segmenting a csv file containing noisy data

Say I have a csv file with these columns: timestamp,cpu,memory An example of the shape of the actual data would be this chart: Having the data visualized in this way, it's easy for the human eye ...
4
votes
1answer
2k views

Weird SSH/SCP progress meter behavior

I've got a very weird SSH behavior and it's making me a bit nervous. Basically the progress meter is totally bogus: so bogus that it's nearly useless. And I fear that there may be something else going ...
0
votes
1answer
48 views

sed how to do “or”

I have the following two lines that work ok: /\.to <\=/ s/<\=/be <\=/ /\.to_not <\=/ s/<\=/be <\=/ I would like to combine them and I tried: /\.to( |_not )<\=/ s/<\=/be ...
3
votes
2answers
619 views

vim: Execute BundleInstall without showing the vim interface

I have a installation script that I use to initalize my vim plugins when I'm on a new machine #!/bin/bash # Clone vundle into the directory if it's not already if [[ ! -e bundle/vundle/.git ]] then ...
4
votes
1answer
3k views

How can I fix the issue where Add/Remove Software never asks for my password?

Using CentOS Release 6.4 x86 when I go to System > Administration > Add/Remove Software and try to add software or refresh the package list, I immediately get the following error: Authorization ...
4
votes
2answers
10k views

Installing Android-x86 on a USB (not creating a Live USB)?

I want to carry around an Android OS install on a USB so I can have a Google Authenticator with me everywhere I go since I don't own any mobile devices. The idea being that I can run Android through ...
-1
votes
2answers
584 views

How to install Okular under SUSE (on a server)?

I would like to install the pdf viewer Okular on a SUSE Linux Enterprise Server 11. I am familiar with apt under Ubuntu, but on SUSE, I only found rpm to install .rpm files. I am wondering how Okular ...
6
votes
2answers
323 views

How to send command output to GNU Screen's copy mode buffer

Is there a way to send the output of a command to a GNU Screen's copy mode buffer. I'd like to type something like this: $ echo 'this is an example' | screen_send_to_copy_mode or, maybe C-a Some ...
0
votes
1answer
250 views

configure web server in RHEL

I have installed Request tracker in my RHEL 5.6 system. The RT installation succeeded and I have also installed apache web server, mysql, phpmyadmin that is required for running the request tracker ...
2
votes
2answers
124 views

change regular user's password with root access

I have Ubuntu installed on a Raspberry pi. I have a normal user pi, but I forgot the password. However, I do have root access. How would I change pi's password using root?
5
votes
5answers
2k views

Pattern matching across multiple lines

What is a quick and easy way to validate if the pattern "301 domaname.com 200" is present within BASH when spread across multiple lines of output? I was using something like the following: awk ...
0
votes
1answer
238 views

How can I pass in a parameter to sed?

To be more precise - how can I pass in a parameter to a program that then calls sed - how can I 'pass' that parameter along? I have a file 'source_code.sc'. I have a sed script "find_expect": #n ...
4
votes
1answer
1k views

bind key sequence to Escape, zsh

How would I map jj to Esc in zsh? I'm trying to recreate a key-mapping that I have setup in vim, where I have jj mapped to ESC so that whenever I double-press j, it sends the an <Esc> to ...
1
vote
0answers
424 views

Changing file permissions of auto-mounted hot-plugged FAT32 USB partition

Linux can read from, write to and execute files (vfat driver) formatted as FAT32. Auto-mounting (in my case Ubuntu) leads however to all files owned by root and not executable. By changing the file ...
3
votes
3answers
4k views

/usr/bin/host not picking up changes to /etc/hosts even after reboot

I have a Ubuntu Server 12.04 (amd64) machine on which, when I change /etc/hosts, the changes aren't picked up, even after a reboot. I am using /usr/bin/host to test, but none of the other programs ...
1
vote
1answer
1k views

startx from mac osx to RHEL6

I am trying to get a GUI over ssh -X. My RHEL6 server did not have X Window System and a graphical desktop environment. So I installed using yum groupinstall "X Window System" Desktop. It installed ...
1
vote
1answer
193 views

How to retrieve environment variable from string name in KSH

I've the following variable : x="envVar" and 'envVar' is the one of my environment variable's name containing a path (of a folder by instance). So I'd like to do cd $x but it doesn't work. ...
1
vote
1answer
125 views

Looping through commands' results, KSH script

I'd like to put two strings in two different variables. Let's take a small example. after a simple grep, I got this : $ grep nl.*acc.*bas : ABAS01=... ABAS02=... I'd like to have two variables, ...
1
vote
2answers
3k views

Why FreeRADIUS service won't work on Centos?

I have installed FreeRADIUS server on centos via yum successfully, but I couldn't start radiusd service. when I run as root user and exec the following radiusd -X an error is occurred. [root@userAAA ...
1
vote
3answers
11k views

Set environment variable automatically upon SSH login (no root access)

The situation: I run Ubuntu 12.04 LTS on a virtual machine. I regularly have to connect to my account on a university server, I do this by opening up terminal and using ssh -Y username@server.com. ...
0
votes
0answers
30 views

SSH tunneling via few hosts [duplicate]

That question is'n only about Unix/Linux - but contain something... So - given: host1 with TeamCity server running on 8111 port; host2 which will be "ssh-proxy" between client and host1. From host1 ...
0
votes
2answers
69 views

Modifiying source code of an application

I'm doing a project where i need to change or add some functionality on an Debian based application. I've downloaded the source code but problem is they all have .rpm as extension. Anyone know what do ...
7
votes
2answers
4k views

Having trouble exporting FUSE via NFS

I've got a self-written FUSE file system I mount on my NFS server on mountpoint /export/example/mount. Then I export a parent directory of the FUSE via NFS. The /etc/exports contains the options ...
0
votes
1answer
330 views

How to make options mandatory in KSH script

Here is the skeleton to catch arguments in my script : # fMain(){ while getopts "d:e:h" _OPTION; do case $_OPTION in d) ...
2
votes
2answers
1k views

GConf equivalent for KDE

GNOME and many window managers such as the Awesome WM use the GSettings settings database, with Dconf as the backend. What is the equivalent of this for KDE? Also, we can edit GSettiings with the ...
5
votes
2answers
2k views

How does AptConf work in Debian Wheezy?

As far as I understand, the /etc/apt/apt.conf file of Squeeze has been broken into separate files within the /etc/apt/apt.conf.d/ directory in Wheezy. The debian wiki has not been updated yet and it ...
16
votes
2answers
829 views

How can I stream data to a program that expects to read data from a file that is given as a argument?

I have a huge gzipped file and I want a program (4s-import in this case) to read it. It takes a lot of time to first unzip the file and then call the program with the path to the file as an argument. ...
2
votes
1answer
467 views

How to have a bash script perform a specific action on errors of _each_ command?

Similarly to set -e performs an exit on "uncaught" $? != 0, I'd like to have this event trigger the execution of another command, e.g. a logger call. How can this be done?
2
votes
1answer
671 views

Sort doesn't use natural order

I have used uniq -c and sort extensively on other machines, and it always worked very well. Now, on my new Ubuntu (13.04) machine, I end up with a weird ordering: % cat queries.log | grep INSERT | ...
0
votes
1answer
768 views

Finding all WAV files of multiple directories and copying them to local computer from server

I have a Linux server where the directory structure is Mainfolder1/folder2/firstfile.wav /folder3/secondfile.wav /folder4/thirdfile.wav Mainfolder2/folder1/fourthfile.wav Now, ...
0
votes
1answer
174 views

debootstrap local download dir

Can someone tell me where does debootstrap store downloaded packages that it's about to install? Possibly also the download method would be interesting (wget/curl/apt-get). In my case I run: sudo ...
6
votes
5answers
45k views

How to start a program in the background

The program Boblight does not run in background. There is no noticeable difference between executing sudo boblightd and sudo boblightd& How can I solve this problem that the console will ...
0
votes
0answers
2k views

How to enable bluetooth in Ubuntu 13.10?

Before updating ubuntu to it's current version, bluetooth used to work just fine. But, now I've been facing problem regarding this bluetooth setting. While adding devices,it keeps on searching but ...
0
votes
2answers
5k views

create a cronjob to run php script

I've created a cronjob in Xubuntu to run a PHP script in every 5 minutes. I did it as follows. I entered the following command: $ crontab -e Then entered the following: */5 * * * * /usr/bin/php ...
0
votes
1answer
92 views

xterminal dosen't pass key-strokes to emacs

I opened emacs using emacs -nw. Now, when I press M-v, it opens the view menu of the terminal, instead of passing the command to emacs. Is there a way to prevent this from happening? (I'm running on ...
0
votes
4answers
4k views

Output the result of DF command to variable then print to an HTML page [closed]

I am having a problem executing a script that basically captures the disk space from the server and outputs the result to an HTML page. STORAGE=$(df -PTh | column -t | sort -n -k6n) The output in ...
11
votes
1answer
2k views

Is there an easy method for installing binary builds of glibc?

Time and time again I see questions such as these: GLIBCXX 3.4.15 on Centos 6 CentOS 4.8 and glibc 2.5 And these are the types of solutions we're typically pushing: how to run new software ...
2
votes
0answers
391 views

Writing to Arbitrary Memory Addresses [closed]

I'm reading "Art of Exploitation 2nd Ed." and I have a question regarding a section on format string attacks. Target program Below code (fmt_vuln.c) is a target program. #include <stdio.h> ...
4
votes
1answer
528 views

xautolock: how to auto-unlock on user activity?

I need to run a script after a period of user inactivity. For that I use the wonderful program xautolock. Now, I also need to run another script when the activity is resumed (e.g. mouse is moved or a ...
2
votes
2answers
767 views

How can I modify and rebuild the Finnix ISO to include my own scripts?

I've been using this live boot distro, Finnix to do some installation work on several virtual machines. I'd like to modify the ISO file to include a script I need to do installations. I've booted the ...

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