1
vote
1answer
382 views

Debian + Linux kernel 3.12.22: “Kernel module loader” option is not available

The Debian guide for compiling a kernel says: Do not forget to select “Kernel module loader” in “Loadable module support” (it is not selected by default). If not included, your Debian installation ...
19
votes
2answers
1k views

What is the purpose of patches of the linux kernel?

For each Linux kernel version, there is a patch file available for download. For instance, linux-3.12.22 has a corresponding patch-3.12.22. What is the purpose of that patch? To always patch the ...
-1
votes
1answer
147 views

Common code for kernel and userspace [closed]

I'm working on a linux project. I want to have some code (to be specific, a struct) and a header file (my own implementation) common to both the kernel and the userspace. Can someone tell me how to ...
2
votes
1answer
282 views

Join multiple files in a directory column wise

I would like to join about 100 files in the same directory column-wise. I have tried paste file1 file2 | column -s $'\t' -t This works fine for 2 files. But when I try to do it for 100 files, I ...
0
votes
1answer
61 views

Raspeberry pi OTG power and usb pen drive

I know The OTG port is used to power the pi. So, how could I use a usb drive on that OTG port ? Could i plug a powered hub and the drive on the hub ? Moreover, is there any other way to power the pi ...
0
votes
0answers
292 views

pm-suspend fails to wake up

I use pm-suspend on Debian 7.5. Most of the time everything works perfect, but sometimes it fails to wake up. The fans spin up, even the hard disk shows activity, but there is only a blank screen. ...
1
vote
1answer
350 views

rsync --delete deleted most files in the destination directory, why?

I got my config files in /etc folder all messed up because I did not take care of shell expansion while doing rsync: rsync --progress --delete -avhHe ssh /etc/logrotate.d/{httpd,mariadb,php-fpm,ppp,...
2
votes
3answers
9k views

How to format write protected SD card

I am newbie in Linux, I want to format my SD card using Ubuntu, for this I follow this tutorial After typing df command , I got list of storage devices.From here I can see my SD card name is /dev/...
3
votes
1answer
995 views

Debian: GPG cannot fetch Linux Kernel key

I am in the process of recompiling the kernel on Debian. Following the instructions on kernel.org, the first step is to verify the signature. But GPG complains that it cannot find the public key: # ...
3
votes
0answers
79 views

Determining which version of the NFS protocol is in use by a mounted NFS filesystem [duplicate]

I mounted an NFS filesytem from the shell using the code: LINE='nfs.francky.me:/export/beatdb /beatdb nfs tcp,intr,rw 0 0' grep "$LINE" /etc/fstab >/dev/null || echo $LINE >> /etc/fstab ...
5
votes
1answer
149 views

Why does `bash -c somecommand` sometimes not leave a bash process?

On an Ubuntu 12.04, with GNU bash, version 4.2.25(1)-release (x86_64-pc-linux-gnu), I tried the following command: $ bash -c 'pstree -s $$' init───sshd───sshd───sshd───bash───pstree $ bash -c 'pstree ...
0
votes
0answers
3k views

GTK3+ and C++ on OSX - “No GSettings schemas are installed” error

I'm trying to run a C++ example with GTK3+ and GStreamer components on OSX. I can gcc compile the source with: gcc -o basic5 basic-tutorial-5.c 'pkg-config --libs --cflags gstreamer-1.0 gstreamer-...
19
votes
1answer
619 views

Why does chmod require disk space? Not-in-place algorithm?

I try to chmod some files and I get the error "disk quota exceeded": It's true that I don't have that much space remaining in the filesystem where I use chmod, namelynfs.mit.edu:/export/evodesign/...
6
votes
2answers
45k views

Setting PATH vs. exporting PATH in ~/.bash_profile [duplicate]

What's the difference and which is better to use when customizing my bash profile? Documentation on the export command is scarce, as it's a builtin cmd. Excerpt from version 1 of my ~/.bash_profile: ...
3
votes
3answers
2k views

detect process eating cpu without: top, htop, ps?

I went thru a problem where I could only guess what process was eating the cpu. My cpu usage was about 80% for all cores at psensor. I tried htop, top and ps -A -o pcpu,pid,cmd --sort +pcpu (the ...
1
vote
2answers
220 views

keybinding in xterm to shift one line up using shift+up

follow urxvt: scroll just one line How can we set keybindings so that shift+up can scroll one line up in xterm?
2
votes
3answers
711 views

Delete non-unique group with group ID as primary group of a user

So say I have two groups with names testing1 and testing2. Both groups have the same group ID of 2000. Then I add a user named testing-user with GID of 2000. Along the way I want to delete group ...
7
votes
3answers
160 views

Can we configure different shells for different users on a single Linux/Unix distribution?

Well, this is not something that I want to do but I ask this question to know more about Shell configuration in Unix/Linux systems. So, the situation that I want an answer to is the following -: As ...
1
vote
0answers
112 views

Delete files that are not included with `rsync --files-from`

I copy files to another location using rsync with the option --files-from. Sometimes, a file gets deleted and is not included in that list of files any more. I tried to use --delete, but that would ...
2
votes
2answers
185 views

Is there a way to administrate multiple computers at the same time?

Let's say you have 24 computers. They all have the same Linux or Unix distro on them, with the exact same configuration, but with different users. Is there a way to be able to do the exact same thing ...
2
votes
2answers
5k views

What does “batch mode” mean for the top command?

I was reading about the top command and I came across something I don't quite understand: top options: -b Run in batch mode. This is useful for sending output from top to other programs or to ...
1
vote
2answers
18k views

Mounting NFS: owners are nobody:nogroup

I mounted an NFS filesytem from the shell using the code: LINE='nfs.mit.edu:/export/evodesign/beatdb /beatdb nfs tcp,intr,rw 0 0' grep "$LINE" /etc/fstab >/dev/null || echo $LINE >> /etc/...
3
votes
0answers
280 views

Is there a more elegant way to unlink two tmux clients sharing a session from inside tmux?

This is almost a code-review question, but very *nixy and more about configuration than code. For years since I switched to tmux from screen I've had a couple of nagging issues that I could not make ...
1
vote
1answer
551 views

Why isn't this XMLStarlet Query Working?

I'm trying to write a simple bash script that parses price info from the ebay developer API search results. Here's an example of XML search results for "Detective Comics 700": <...
0
votes
2answers
8k views

Fastest & Most Core way to replace “\r\n” with “\n” in a file?

I suppose tr is a more core method and thus probably a faster way to replace things within a given file. However tr can only replace equal amounts of characters. meaning... 2 characters can only be ...
23
votes
2answers
16k views

Do parentheses really put the command in a subshell?

From what I've read, putting a command in parentheses should run it in a subshell, similar to running a script. If this is true, how does it see the variable x if x isn't exported? x=1 Running (...
0
votes
1answer
176 views

Letters tty terminal text mode are very small in debian. How to increase? [duplicate]

My Debian 7 is with letters tty terminal text mode are very small. How to increase? I know that Fedora 20 is possible to install in a troubleshooting installation. Thanks!
3
votes
1answer
3k views

Linux Mint (Cinnamon, Muffin) set a keyboard shortcut where one of the keys is a mouse

Linux Mint 17 Cinnamon Edition. I want to create a keyboard shortcut involving the mouse. Specifically, I want to make it so clicking Alt, right-click, and dragging my mouse allows me to resize the ...
2
votes
1answer
3k views

Routing a LAN through OpenVPN on OpenBSD 5.5

I'm configuring an OpenVPN gateway to allow a LAN access to the internet through the tunnel. The gateway is running OpenBSD 5.5-stable amd64 on the PC Engines APU platform. The LAN contains re1, re2, ...
3
votes
1answer
890 views

sudo environment: “g++: command not found”

I have a relatively fresh RHEL 6.5 install, on to which I have installed from source GCCC 4.9. After I installed GCC 4.9, I uninstalled the distro-provided older GCC version via: sudo yum remove gcc ...
1
vote
0answers
71 views

Hotplug Device Driver Priority

Is it possible to have more than one driver for one purpose (eg. USB) included in the Linux kernel? If so, then how does the kernel decide which one to load?
0
votes
1answer
787 views

eval used with piped command

I have file.txt with command stored in one line (this command is valid when running in console) and I want to execute it in one line with sh like cat file.txt | eval what is missing? any protips? ...
3
votes
1answer
899 views

Samba write permission problem

I use Samba to share printers, files, etc. But I have a problem. The place to share not writable. Writable is only user directory. I attach the smb.conf file. smb.conf # # Smb.conf file by PepinCZ ...
-24
votes
2answers
435 views

Which amongst the given option is TRUE about login shell?

Which amongst the given options is TRUE about the login shell? The login shell varies every time the user logs in. The kernel decides on the availability of the shell during login. The login shell ...
0
votes
0answers
675 views

Weird Wi-Fi connection issue on Linux Mint 16

We have a LG-R590 laptop and an AirTies 5343 WLAN router at home. When the router broadcasts the SSID of the wireless home network I cannot connect to the network automatically, I have to connect to ...
0
votes
5answers
81 views

More concise methods for wrapping a file than using sed

Introduction script: sed -i '1i <?xml version=\"1.0\" encoding=\"utf-8\"?>' $1 sed -i '/<?xml version=\"1.0\" encoding=\"utf-8\"?>/a<hello>\n\t<world>' $1 sed -i "\$a\\\t<\...
2
votes
0answers
183 views

Installing Arch Linux on empty eee pc's hard drive

I have a problem with the installation of Arch Linux on an Asus 1000HD eee pc. The fact is, it had a Windows XP home basic installation, and it was still very very slow with that. So I formatted the ...
19
votes
2answers
839 views

What does “magic tests” mean for the file command?

I was reading about the file command and I came across something I don't quite understand: file is designed to determine the kind of file being queried.... file accomplishes this by performing ...
4
votes
0answers
198 views

Takeover delay in Heartbeat HA cluster

I have set up a heartbeat HA two node cluster. And both of server have same configuration of ha.cf #cat /etc/ha.cf logfile /var/log/ha-log autojoin none bcast eth1 warntime 20ms deadtime 40ms ...
3
votes
1answer
1k views

Open a specific application in a *new* workspace with i3wm

My question is something like this - but I don't want to open a given application on a specific workspace, I want each instance to open on a new workspace each time. The OP in the linked-to ...
3
votes
1answer
6k views

How to change the default version of Python in Debian 7.5?

I'm using Debian 7.5, and I've installed Python 3.3 and 3.2. How do I make 3.3 the default for when someone types python in the command line?
0
votes
1answer
426 views

Raspberry pi running owncloud not reachable using no-ip URL

I have a problem reaching my raspberry pi from outside of my LAN and I don't remember having changed anything. It was working previously, but I don't know what changed. I've installed owncloud with ...
0
votes
2answers
12k views

Passing a variable to a bash script that uses 'EOF' and considers the variable a literal [closed]

in this script i end up with "$1" being saved to the /test file. #!/bin/bash cat > /test << 'EOF' $1 EOF the truth is.. i need to keep 'EOF' as 'EOF' because my argument($1) contains ...
10
votes
2answers
6k views

SSH & ForwardX11 vs ForwardX11Trusted --> beyond my grasp

I am on Ubuntu 14.04 and trying to get my head around ForwardX11 vs ForwardX11Trusted. My default ssh_config contains the following lines: # ForwardX11 no # ForwardX11Trusted yes Further, man ...
1
vote
1answer
344 views

How to Upgrade Oracle VirtualBox 4.1.12 to to 4.2.10

I installed Oracle VirtualBox 4.1.12 in my Ubuntu 12.04. Now I want upgrade from 4.1.12 to 4.2.10 version. How can I upgrade the Oracle VirtualBox in command line
0
votes
1answer
669 views

Bash Script : Passing a variable to a bash script that contains quotes, single quotes. etc [closed]

lets assume this is the string: 'a',"b" it contains both single and double quotes. how would you pass this to a bash script as a single string ? this is the bash script: #!/bin/bash echo $1 ...
2
votes
2answers
2k views

“cat” command: how to automatically escape everything that might be a violation?

If you copy the contents of httpd.conf and then paste it into a cat command.. such as this one.. #!/bin/bash cat > /test << EOF pasted here.. EOF you run into this error: -bash: ...
7
votes
4answers
32k views

How to get lines 10 to 100 from a 200 line file into a new file [duplicate]

I have file with 200 lines. I need to extract lines from 10 to 100 and put them into a new file. How do you do this in unix/Linux? What are the possible commands you could use?
6
votes
1answer
19k views

Is no caching mode page a serious error?

My server log displays the following error messages in RED: kernel: sda: sda1 sda2 kernel: sd 0:1:0:0: [sda] No Caching mode page found kernel: sd 0:1:0:0: [sda] Assuming drive cache: write through ...
3
votes
1answer
648 views

How to make a PAM substack “requisite”?

For the auth section of my PAM configuration, login and mdm etc. call common-auth. I have common-auth calling the following as a substack (as auth substack krb5ldap-cache-auth): auth optional ...

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