7
votes
1answer
233 views

What are the difference between those four commands (fifo, process substitution, redirection…)

My goal is to create a simple echo server using nc and a single fifo. I'm not looking for the best way to do it, I'm merely trying to understand the semantics of the following commands (when does fork ...
1
vote
1answer
184 views

Disabling power management

I am running Cubieez on a Cubieboard2, I need to disable screen saver and power management, I've followed several tutorials about but none seems to work, I've written: xset s off. xset -dpms xset s ...
7
votes
7answers
5k views

“find: .: No such file or directory” while using find on the current directory

Find command seems not to work at all. For example, I'm in a directory where there absolutely is file named index.php and I execute this: [root@server htdocs]# find . -name "index.php" find: .: No ...
3
votes
0answers
282 views

GSettings is reset during reboot

Formatting is a pain, especially due to all the package installation, configurations and so on. To make this easier, I made a large script with simple config files that is easily changed. So once I ...
4
votes
3answers
532 views

Where is the source code for copy-paste?

I've been working with copy paste functionality on a Linux system. I downloaded the kernel source for the first time. Where can I find the code related to copy paste functionality? My guess is that ...
5
votes
2answers
100 views

Command re-assigned

I found a Bash script snippet earlier with which to echo a string to stderr: echoerr() { echo "$@" 1>&2; } echoerr hello world This remained in my clipboard, and when I wanted to edit a file ...
18
votes
2answers
836 views

explanation on chown(1) POSIX spec

The POSIX spec for the chown utility mentions in its rationale section about the chown user:group syntax (formerly chown user.group) (emphasis mine): The 4.3 BSD method of specifying both owner ...
1
vote
1answer
69 views

Matching two files, line by line? [closed]

I have two files consisting of numbers. Now, I want to match the line of first file to all the line of second file and increasing the counter if the match is found. How to write the bash script for ...
9
votes
2answers
986 views

Using a shell script as a virtual printer

I have a shell script that takes a PDF file as an argument and prints it with additional printer specific options. How can I add this script as a virtual printer that can be selected from the GUI? ...
9
votes
6answers
2k views

Serialize shell variable in bash or zsh

Is there any way to serialize a shell variable? Suppose I have a variable $VAR, and I want to be able to save it to a file or whatever, and then read it back later to get the same value back? Is ...
4
votes
2answers
345 views

How do you correctly extract all command synopses from manpages in /usr/share/man/man1?

I'm trying to extract all command synopses from manpages in /usr/share/man/man1 using: #!/usr/bin/env bash ## synopses - extract all synopses in /usr/share/man/man1 cd /usr/share/man/man1 for i in *....
1
vote
2answers
627 views

Gnome Terminal appearance

Is it possible to get the gnome-terminal in GNOME 3 to be borderless, similar to how urxvt looks? Without the big top of it that says Terminal with your working directory or the menu bar?
1
vote
1answer
3k views

Crontab does not run?

crontab -e 0 */4 * * * root /usr/bin/rsnapshot hourly 30 3 * * * root /usr/bin/rsnapshot daily 0 3 * * 1 root /usr/bin/rsnapshot weekly 30 2 1 * * root /usr/bin/rsnapshot monthly tail /var/log/...
-4
votes
2answers
7k views

Shell script to compile C files

I used to have a shell script that would compile all of the FILE.c files in a directory to FILE.out I lost it and am trying to remake it and have the following which I know is very similar but can't ...
1
vote
1answer
704 views

Raspbian migrating to bigger SD card

As I was running out of space on my Raspberry PI, I picked up another SD card. The 'old' card was only 4GB, the new one is 8GB. I made an image with Win32DiskImage and wrote this to the 8GB card. ...
1
vote
2answers
601 views

how to route local ip subnet to vpnc tunnel

I have a vpnc client that will connect to Cisco and I put any information to /etc/vpnc/default then I run vpnc-connect status connected. All routes will be replaced to tun0. The targeted 10.10.0.9 ...
2
votes
2answers
491 views

How does a parallelized Python program look with top command?

I work on a shared cluster. I've seen people run parallelized c code on this cluster which, when I use top to see what processes are running, are shown to be using (for example) 400% of the CPU, ...
3
votes
0answers
358 views

debootstrap terminates partway through with “stdin: not in compressed format”

I'm on an Arch GNU/Linux system, fully up-to-date (both official repositories and from the AUR). I'm attempting to install a copy of Debian Wheezy so that I can chroot into it and work with the system....
4
votes
2answers
8k views

Mounting Disk Image in Raw format [duplicate]

While Trying to mount a disk image in Raw(dd) format using the following command mount nps-2010-emails.dd /media/manu/ I get the following error message mount: you must specify the filesystem ...
1
vote
1answer
280 views

mutt: ask for confirmation before moving message to archive

I have following macro defined in my muttrc: macro index s ":set confirmappend=no delete=yes auto_tag=yes\n\ <save-message>=archive\n<sync-mailbox>:set delete=ask-yes\n" When I ...
5
votes
3answers
3k views

Restrict user access in linux

I'm creating a new user with the following details: useradd -d /var/www/html/testuser.com -G users testuser I proceed by creating a new password for the user and attempt to login via SSH, I land on ...
7
votes
5answers
16k views

How do I extract the content of quoted strings from the output of a command?

I have output from VBoxManage list vms which looks like this: "arch" {de1a1db2-86c5-43e7-a8de-a0031835f7a7} "arch2" {92d8513c-f13e-41b5-97e2-2a6b17d47b67} I need to grab the names arch and ...
7
votes
1answer
11k views

Why is my Systemd unit loaded, but inactive (dead)?

I'm trying to set up Graphite on my server. I can start the Carbon Cache daemon no problem with sudo /opt/graphite/bin/carbon-cache.py start, but I'm struggling to run it as a Systemd unit. Here's ...
0
votes
3answers
245 views

Looping the listing files in UNIX

I've given the command: ls -lrt and the listed files and directories are: drwxr-xr-x 4 root root 4096 Feb 2 2014 abc drwxr-xr-x 4 root root 4096 Feb 2 2014 cde drwxr-xr-x 4 root ...
6
votes
2answers
3k views

WiFi not working after restoring from hibernation (authentication times out)

My Intel 6205 wireless network card does not work after hibernating. It sometimes also does not work on boot, failing in the same way. Occasionally, it also stops working after ~10 minutes of ...
5
votes
1answer
194 views

How to get rid of unnecessary lines in gnuplot

So I'm pretty new to using gnuplot, and my code looks like this: set isosamples 40 unset key set title "Radial Matrix Elements" set xrange [1:15] set yrange [1:15] set xlabel "n1*" set ylabel "n2*" ...
1
vote
1answer
269 views

Toggle Skype notification status

Being notified whether a contact appears online/offline or not can be changed via the Skype Options or via the ~/.skype/your_skype_id/config.xml. In this file, depending on what you chose, on can find ...
3
votes
3answers
2k views

AWK: Passing shell variables to awk

I am trying to pass a variable number of arguments from the shell script to a pattern recognition subset of a table. Here is my attempt so far: The file 'infile': ID,GROUP 1,GROUP2 2,...
1
vote
1answer
193 views

LVS is not accessible from the outside

I'm currently busy setting up a LVS - Linux Virtual Server: root@debian1:~# ipvsadm -L IP Virtual Server version 1.2.1 (size=4096) Prot LocalAddress:Port Scheduler Flags -> RemoteAddress:Port ...
3
votes
1answer
147 views

What GPG agent does Elementary Luna use?

Whenever I try decrypting or signing files with GPG in Elementary Luna, I see a graphical password prompt come up for my GPG key. The key is then cached in memory for future requests for some time. ...
4
votes
1answer
155 views

How can I tell what woke my laptop from suspend? [duplicate]

On other operating systems, there are ways to see what process or event woke them from suspend. I leave my laptop often for multiple days in suspend, sometimes to find that it has woken itself up and ...
2
votes
0answers
461 views

After enabling SELinux (permissive mode) on Debian Wheezy, gdm3 does not finish loading

I recently enabled SELinux on my Debian Wheezy system, in permissive mode (I have confirmed that it is indeed operating in permissive mode). However, after the file labelling double-reboot, gdm3 doesn'...
1
vote
1answer
67 views

How to add additional control key?

I am using xkb to add an additional control key as follows: key <HENK> { [ Control_R ] }; However, it does not work. I even tried xmodmap without success: xmodmap -e "...
2
votes
1answer
531 views

MySql synonym drop and create

I am running into an issue that, when my script is run, the MySql section of it isn't working or is dropping the synonym. Is there something else I need to put into the command to have it log into the ...
0
votes
0answers
108 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, ...
0
votes
1answer
87 views

How can I modify route table?

I don't want to delete or add, just want to modify one rule. Is there such a command or do I have to resort to Delete and Add ? Computer is running Debian 6.
2
votes
0answers
3k views

What's missing with my SELinux installation?

According to Introduction to SELinux, section 14.4.2, SELinux support is built into the standard kernels provided by Debian. The core Unix tools support SELinux without any modifications. I have ...
19
votes
1answer
1k views

If chown can change groups, why was chgrp created?

So there's chown which lets you change the owner and group of files and/or directories. But there's also chgrp which only changes the group. Why was chgrp created? Isn't it redundant?
1
vote
1answer
558 views

top/ps/mpstat showing different output

When my top shows a load of 19/20 and my ps shows root@server:/home/nohup# ps -eo pcpu,pid,user,args | sort -k 1 -r | head -5 %CPU PID USER COMMAND 122131 18695 mysql /usr/sbin/mysqld xxxxx 0....
0
votes
1answer
87 views

get cpu by user

Working with monit I need create an alert that get cpu usage of system users, so: top -b -n 1 -u user1 | awk 'NR>7 { sum += $9; } END { print sum; }' seems a good solution but I'm not sure about ...
1
vote
2answers
472 views

Alias from .bash_profile is not reflected across the system

I have few path settings and alias in .bash_profile, and I am exporting those. For example: alias gcc=/abc/def/......./myrtgcc export gcc And I want use myrtgcc to compile C programs either from ...
4
votes
2answers
25k views

Error when unzipping a file

I am getting the following error when unzipping a file unzip user_file_batch1.csv.zip Archive: user_file_batch1.csv End-of-central-directory signature not found. Either this file is not a ...
3
votes
4answers
8k views

Get the latest directory (not the latest file)

My folder parent has the following content: A.Folder B.Folder C.File It has both folders and files inside. B.Folder is newer. Now I just want to get B.Folder, how could I achieve this? I tried this,...
2
votes
1answer
3k views

Can't run yum update

I've been banging my head on the keyboard with this! I'm working on CentOS 6.5 x86_64. Firstly I tried to update php and apache using easy apache. The update failed very quickly so I went on the ...
1
vote
1answer
2k views

script to send e-mail for success or failure

My Oracle backup sends out an e-mail with notification that backup completed and it was successful or failed depending upon it find some pattern. Our backup logs are getting very big - 14mg. Since ...
0
votes
1answer
536 views

“Enabling additional executable binary formats” fails

On ubuntu 14.04, after doing do-release-upgrade -d several systems failed like dbus, network-manager, sound card etc.. I am logged into terminal instead of X. Looking at the /var/log/boot.log I ...
4
votes
3answers
2k views

Can't open shell after changing default shell

I changed my default shell to zsh from bash in Ubuntu. I used the steps explained in http://github.com/sorin-ionescu/prezto and ran chsh -s zsh. After this, I couldn't able to log in to any shell as ...
30
votes
5answers
10k views

Where does uname get its information from?

Where does uname really get its information from? I figure this is something that should be straightforward. Unfortunately, I can't find any header containing just that information. Say someone ...
3
votes
3answers
5k views

Linux Fedora 20:How to use microsoft word, possibly with wine?

I have searched the Internet for answers to this question, and find a lot of confusing answers. I have had Linux Fedora 20 installed on my wife's computer, dual boot with Windows, and suggested ...
1
vote
1answer
362 views

How to read characters from a serial keyboard on /dev/inputs/eventX (Speed?)

I'm trying to read from a second keyboard whose inputs can be read from /dev/inputs/eventX, but I get rubbish and not the character expected. I'm accessing my target by using Putty. I can connect to ...

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