2
votes
2answers
268 views

Grabbing keyboard control in shell script

I have a certain shell (zsh) script which reads one character at a time and performs an action afterwards. In the shell, this is realized by "read -k" in a loop. I want to execute the script as a ...
4
votes
2answers
306 views

How to list all aptitude user tags or the user tags for a package?

I'm in a bit of a pickle. Following my own counsel I started using user-tags when working on projects, but now I don't remember how I called some of these tags and this cancels their usefulness. Is ...
2
votes
1answer
336 views

How to interpret cpu_idle and cpu_frequency event's trace logged by ftrace?

I used ftrace to trace two events, cpu_frequency and cpu_idle. I am not able to find out any documentation which states how to interpret this information. I have provided two snippets from the ...
2
votes
1answer
243 views

How do I eval two commands?

If I run this: echo "echo 'a'; echo 'b'" It produces a string which I can then run, and it works - echoes a\nb\n. However, this does not work: $(echo "echo 'a'; echo 'b'") Why not? It doesn't ...
3
votes
3answers
660 views

To which Debian package does /etc/nsswitch.conf belong?

I tried to find out to which package /etc/nsswitch.conf belongs on my Debian machine, but dpkg --search /etc/nsswitch.conf won't tell me. Does anyone know?
1
vote
1answer
208 views

How to undo kernel settings?

While trying to read some kernel parameters, I think I have mistakenly set some instead: # sysctl --system -r ^net.*tcp * Applying /usr/lib/sysctl.d/00-system.conf ... * Applying /usr/lib/sysctl.d/50-...
2
votes
1answer
1k views

linux command to list details (like PID, VID) of connected devices to the serial port(s) (like RS232) of a computer

with USB port we can search Product ID (PID) and Vender ID (VID) of connected devices by using lsusb command. Is there a similar way to get PID and VID if the same device is connected to RS232 serial ...
1
vote
0answers
198 views

Can’t figure out Samba file share permissions as needed.

I’m in the final project class for my degree and my group has to have a Linux server that supports a Windows environment. With the files in the file share need to be read only, can be edited and then ...
2
votes
1answer
1k views

Building OpenFOAM 2.2.2 for Xeon Phi

I'm trying to build OpenFOAM for Xeon Phi on CentOS 6.5 (Linux 2.6.32-431.11.2.el6.x86_64) Using these steps Install Intel Parallel Studio tar xvfz parallel_studio_xe_2013_sp1_update2.tgz cd ...
15
votes
2answers
8k views

alias vs export for simple commands

For simple commands like less, is it better to make an alias or to export the options? Is there any benefit of one over the other? For example, if I want less to always use the -R option to show raw ...
1
vote
1answer
628 views

Impossible to resize window

I'm using Lubuntu 11.10 on a Sony Vaio. After I connected my laptop on a projector for my talk I'm having a problem with the size of one window. As you can see below (Fig. 1) the Mathematica window ...
10
votes
2answers
17k views

Test tar file integrity in bash

I have a bash script that creates a '.tar' file. Once the file is created, I would like to test its integrity and send an email to the root user if the integrity is bad. I know I would need to use ...
1
vote
0answers
68 views

New keyboard messing up mouse

Fedora 20, xfce. I just plugged in a new keyboard, and everything appears to work. There's a backlight-toggling button in the corner. I press it. Now my mouse clicks don't want to register, or my ...
3
votes
0answers
69 views

Some puzzles of how to close file descriptors on sh or bash [duplicate]

Question 1. What will happen if we close a input file descriptor as if it is a output file descriptor? (or vice versa). For Example, $ exec 5<&2 $ exec 5>&- In my linux box, ...
6
votes
2answers
2k views

Command line to burn DVD+R DL media on Linux?

A Plextor PX-750A on a Linux system has made many DVD+R DL coasters while trying to burn an 8GB DVD .iso file with growisofs and the Schilling cdrecord program. I tried growisofs first: growisofs --...
3
votes
1answer
1k views

Mac OSX vs Linux Unix-ness [closed]

So I know that Linux is considered "Unix-like" while OSX is Unix. Why is this? I feel like Linux is much more "Unix-like" than OSX is. What makes OSX more "Unix" than Linux?
1
vote
1answer
94 views

Unable to access external content with this IPTABLES ruleset

My application server is on a network protected by a organization wide firewall, and my server is also using fail2ban. That said, I'd like to set up an additional layer of protection with iptables. ...
6
votes
1answer
2k views

Does 'ulimit -m' not work on (modern) Linux?

This article claims that the -m flag to ulimit does nothing in modern Linux. I can find nothing else to corroborate this claim. Is it accurate? You may try to limit the memory usage of a process ...
1
vote
1answer
2k views

Two HTTP servers on port 80 and 443

I use on my home server, Apache with one main application that is OwnCloud. So to access it from Internet I use URL -> https://my_host.no-ip.org/owncloud I use another HTTP application on the same ...
0
votes
1answer
724 views

Install a different version of Maven from the one provided by Ubuntu

I would like to install a package on Ubuntu 10.04.4 but would like to not use the one available in the one repository that I get when I do: apt-cache policy ${package} I would actually like to ...
8
votes
4answers
33k views

bash: /home/user/.ssh/authorized_keys: No such file or directory

Create a ssh key: $ ssh-keygen -t rsa –P "" Moving the key to authorized key: $ cat $HOME/.ssh/id_rsa.pub >> $HOME/.ssh/authorized_keys bash: /home/user/.ssh/authorized_keys: No such file ...
2
votes
2answers
383 views

Tool for viewing top N items in stream

I'm looking for an existing Linux command-line tools that can accomplish the following: Consider there is an input stream /dev/inputstream which spews an infinite stream of data that looks like this: ...
3
votes
1answer
1k views

Move and resize partitions proportionally

I have a clonezilla image from a disk with GPT, and I want to clone to a larger disk and then resize the partitions proportionally. By example if I have a 100 Gb disk and two partitions of 40 an 60 Gb,...
2
votes
2answers
3k views

Segmentation faults during compilation - where to begin?

I have a particular problem I need solved right now, but I'd really like to know a good strategy for approaching this type of problem - segmentation faults when compiling other people's code, so I'm ...
2
votes
2answers
13k views

How to Install Oracle Java7 in Ubuntu13.04

I am trying to install Java 7 in Ubuntu 13.04 using this tutorial. Preparing your system First you need to remove openjdk for this run the following command from your terminal sudo apt-get ...
28
votes
5answers
3k views

To env or not to env

What is the difference between the command $ env FOO=bar baz and $ FOO=bar baz What effect does env have?
3
votes
3answers
261 views

How to display the time of sadf in epoch format

I have a problem in sadf between ubuntu and centos. The thing is how the date is displayed in both. Ubuntu: root@db1:/usr/local/nagios/libexec/nrpe_local# sadf | head -10 db1.oas3.realmedia.xstrat....
5
votes
1answer
239 views

bash_completion rule for resolving ip into hostnames

I am trying to create a bash_completion rule for my script rmpxe. This script takes <hostname> as its only argument. It then resolves this hostname into <ip_address> and removes the ...
4
votes
2answers
307 views

Is it possible to prevent files created being world-readable?

Assume a user uid=1000 and guids=1000,33,277 is allowed to create a file in the folder /files/. Is there any way I can prevent that the this user allows others to read the file (which are not at least ...
2
votes
1answer
568 views

Can a Linux distro be closed source?

According to the GPL licence, which is the one used by the Linux kernel, every modification in the source must be open source too. But, for example, if I create a new OS based on Linux, I develop my ...
1
vote
0answers
384 views

How does one clean up a stale CIFS mount

I have a recurring problem where I need to mount a drive of a Win32 machine on my LAN so I can read and write files to it. But I have no control of said machine, and as such, said machine frequently ...
0
votes
1answer
66 views

i2b2 VM: Copy VM won't give me a valid IP address (CentOS 6.5 running with VMWare Player in Windows)

Posting on here as well in case this was the incorrect site to post the question. http://serverfault.com/questions/595337/i2b2-vm-copy-vm-wont-give-me-a-valid-ip-address
2
votes
2answers
618 views

Killing background process in bash script when exiting the script

I have a script that tail a file while displaying a clock in the top right corner. I took the clock part from the internet, and it works ok. The entire script is something like (I simplified): while ...
2
votes
2answers
62 views

How helpful is it, really, to report bugs against Stable packages?

If the bug is fixed in a newer (Testing or Unstable) version of the package, is there any hope that the fix might make it down to Stable before the next major release? I imagine not, unless it has ...
3
votes
1answer
870 views

How do I find out what my ssh-key's finger print is?

I ask someone for their public key, and add it to my server. When they connect to the server for the first time, they will get the standard message in the form The authenticity of host '[host]' can'...
1
vote
0answers
885 views

Unmounting shares on logout with pam_mount

I am using pam_mount to mount cifs and sshfs shares for users when they log in to an Arch Linux workstation. I have the a volume line in /etc/security/pam_mount.conf.xml: <volume user="strongbad" ...
0
votes
0answers
142 views

OpenBSD Atheros AR8151 no Ethernet media present

I installed OpenBSD 5.5 on an ASRock AD525PV3. The board uses the mentioned Atheros LAN. It shows alc0 on ifconfig, but the media only has Ethernet manual, and I can't use the LAN. Is there a way to ...
5
votes
3answers
10k views

stdin, stderr, redirection and logs

Is there a difference between those two lines ? /home/user/script.sh >> /home/user/stdout_and_error.log 2>&1 /home/user/script.sh 2>&1 >> /home/user/stdout_and_error.log ...
2
votes
1answer
724 views

How to find text in files and only keep the respective matching lines using the terminal on OS X?

I am pretty new to the terminal and command lines, from what I have found out grep seems to be the right tool for search files for specific text strings. I have a folder with many huge text files and ...
0
votes
1answer
151 views

where are the spamassassin KHOP rules?

I have this spamassassin implementation where I lowered the score on: KHOP_BIG_TO_CC It works when I override the score in my /etc/mail/spamassassin/local.cf file but I cannot find the .cf file that ...
1
vote
2answers
284 views

Create file with specific formatting from directory contents

I am using Solaris and csh. In $home/test there are five files: a.txt, b.txt, c.txt, d.txt and e.txt. If I run % find $home/test/ -type f -print > ../filenames.txt that file will look like: /...
0
votes
0answers
324 views

unable to install KDE on Ubuntu 13.04

I am unable to install KDE on my Ubuntu 13.04.It gives me the following error: The following packages have unmet dependencies: kde-standard : Depends: kde-plasma-desktop (>= 5:76~...
1
vote
7answers
2k views

Can grep be used for searching files with some string in their names?

I understand that grep can only be used for searching for files which contain a string in their content. Can it be used for searching for files with a string in their names? I read the manpage, and ...
0
votes
1answer
88 views

pkg-config --libs --cflags not return anything for libgoogle-perftools-dev

user2702245 said pkg-config --clibs --flags <package> is good enough to provide linker and include information. I tried to find out such information about libgoogle-perftools-dev I ...
3
votes
1answer
173 views

How to evaluate if it's worth using deduplication?

I have a partition where I am considering to use deduplication. For the profile of it's data I think it will be a good choice. Still, before doing it, I would like to evaluate the impact in a more ...
1
vote
1answer
323 views

Search for pattern across multiple files and replace a sub-part in all occurences

I am helping a friend with her thesis written in LaTeX and I need a quick solution for a "search and replace". Using a terminal in Linux, how can I find the following pattern: \caption{*\cite{*}} ...
1
vote
2answers
1k views

How to configure a Fault Tolerance System in CentOS 6.0

I want to implement the fault tolerance in a CentOS environment. EDIT Scenario: Two different systems connected via network having CentOS 6.0. What I want: Now I want to setup Fault Tolerance in ...
19
votes
3answers
13k views

Difference between UUID from blkid and mdadm?

Can someone explain the difference between the UUID's reported by blkid and mdadm? On one of our CentOS systems, for example: [root@server ~]# blkid | grep /dev/md1 /dev/md1: UUID="32cb0a6e-8148-44e9-...
0
votes
2answers
4k views

Privileges for jenkins at apache's folder

I'm having issue similar to this: How to copy files as Jenkins "post build" action if i don't have privileges to destination directory I'm willing to move/copy/rsync files from jenkins ...
3
votes
0answers
127 views

Keep keyboard layout upon inserting external keyboard

I have a custom keyboard layout, that I enable using this commands: setxkbmap -verbose us -variant altgr-intl xmodmap -verbose /home/coub/.myxmodmap This works just fine, the thing is, that when I ...

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