1
vote
1answer
517 views

How does ssh pick which key to use?

I'm using the following as a forced command with hg-ssh. This forced command is designed to just allow pushes with hg. However, I must be doing something wrong, because I can actually log in with ...
1
vote
1answer
197 views

Combining local and remote terminal multiplexing

I use tmux regularly to easily handle multiple terminals on my local machine. Sometimes, I need to connect to a remote machine and start a script in one the terminals (i.e. a pane or window in tmux). ...
2
votes
1answer
118 views

Commandline program affecting subsequent shell output with underlines?

I'm SSHing via Windows PuTTY to my server running Ubuntu Server 12.04. As you can see in the top of the screenshot, the terminal looks normal but when I run Behat (a PHP test automation framework), ...
8
votes
3answers
20k views

How to force fsck at every boot - all (relevant) filesystems?

I'm working with a fanless PC (hundreds of them, in fact) that has debian 6 and 3 partitions( FAT and 2x ext2). The system doesn't have a power button as such so most people tend to yank the plug to ...
3
votes
1answer
385 views

How to limit a user's RAM on Ubuntu? [duplicate]

I currently have a "friend" that has an account on my dedicated server which is running Ubuntu. Not getting into specifics, but he said he will use ~2gb max and he's using ~10gb. On to the question. ...
0
votes
1answer
104 views

How to use a built in driver in the kernel?

I am building the 3.14 kernel for a board that requires the intel e1000e driver. I would like this kernel to have the driver built in so that I can remove loadable module support. I have chosen the ...
1
vote
2answers
360 views

tar specific files based on a pattern

I got a lot of files with the following format: 2014_04_01_11.txt 2014_04_01_12.txt 2014_04_01_13.txt 2013_03_25_12.txt 2013_04_29_15.txt I would like to tar all theses files into an archive 20?? _ ...
1
vote
1answer
127 views

Shell script fails to run on startup

I want an executable program to run on startup. For this reason, I created a shell script: /etc/init.d/server. Then I run chmod +x name_of_script and update-rc.d server defaults. server (script): ...
1
vote
1answer
75 views

Where are the files created by “make modules” when building and compiling the Linux kernel?

To build the kernel, I do make menuconfig make make modules For step3, where do the files go? What's the location for modules? Can I change it by using any env variables?
8
votes
8answers
910 views

Do I require a file system when I do not want to store any data

I asked a question here Is it mandatory to have a file system One of the comments is : how a system without file system would work on linux as even a printer or ethernet card is considered as ...
1
vote
2answers
3k views

yum and openssl disagree on currently installed version in Centos 6.5

I'm attempting to ensure that we are using the most recent openssl version on Centos 6.5, and yum reports that we are, but openssl continues to report that its version is an older one: ...
1
vote
1answer
885 views

Can't yum WINE from repo - No package wine available

I'm trying to install WINE on Centos 5.10 as per some instructions I wrote last year using this instruction: # yum install wine However when run, it can't find any package under that name: # yum ...
3
votes
1answer
238 views

Merging text files based on their filename

I have hundred of files with the following format: 2013_01_19_xyxyxyx.txt 2013_01_19_xyxyxyx.txt 2014_03_21_xyxyxyx.txt 2014_03_21_zxzxzxz.txt 2014_03_22_abababa.txt 2014_03_22_cbcbcbc.txt etc. I ...
0
votes
0answers
41 views

Increase brightness in a part of the display

I have a laptop with a damaged screen: while it displays an image, one half of it is darker than the other half. Is there any tool to increase the brightness of only a single part of the display? ...
0
votes
1answer
192 views

Which Desktop Linux version can run decently on For P4 & 750MB Ram

I just installed Ubunta 13.10 on an old P4 with 750MB Ram, but the system is running too slow to be used for anything. I had XP running on it and worked fast enough to use, but I decided I wanted to ...
1
vote
1answer
210 views

Execute commands on tmux detach

Is it possible to execute commands on tmux detach? I usually have a rails console and server running in the tmux session, on detach is it possible to automatically end those?
0
votes
6answers
1k views

grep, display only files starting with . (hidden)

I tried to display only hidden files but dont know how to do it. That is working(but matching also dots in other places) ls -la | grep '\.' Was trying adding ^ but didnt find soultion.
0
votes
1answer
266 views

Highlight patterns in command output (grep-like but without excluding lines) [duplicate]

I need a command that colorizes some symbol sequence in output of a certain command. I'd like it like grep make it. $ some-command | grep symbol-sequence However grep removed lines that isn't ...
2
votes
2answers
659 views

How to get CPU Percentage as a Counter?

I would like to monitor total CPU utilization percentage as a counter. The reason I would like it as a counter is that data won't be lost between samples (and I can have the graphing side calculate ...
1
vote
1answer
788 views

Setting up init.d service daemon priority (with or without monit)

Does anyone know how to change the process priority with monit? I want a high one. Monit config file for my service so far: check process RPiQuadroServer pidfile /var/run/RPiQuadroServer.pid ...
3
votes
1answer
5k views

passwordless ssh is not working in CentOS 6.4?

I am setting up passwordless login from this link but I can't get it to work. When I do ssh localhost it always asks for a password. I have also referred to this question: ssh password less ...
0
votes
1answer
2k views

“No package glibc.i686 available” while installing glibc with yum

I try the following, but I get No package glibc.i686 available. What do I need to do in order to install the glibc.i686? Or maybe there is another way to solve this problem? yum install glibc.i686 ...
4
votes
2answers
516 views

Faster way to rename duplicate files (identified by fdupes) in another directory?

I have a directory full of pdf files of journal articles, most of which are named by their bibtex key. Some time ago I made a backup on an external hard drive, but I haven't kept it up to date and ...
2
votes
1answer
606 views

how to correctly delay the execution of a startup script based on a tested condition?

I need to start a service (namely ntp) only when true Internet connectivity is in place (not only a link up). I seem to have noticed that some startup scripts delay themselves when a condition is not ...
2
votes
1answer
130 views

Kernel optimiziations for ioctl AF_INET operations

Our server solution handles many tunnel operation requests (add/update/delete) using the ioctl interface, and the AF_INET address family socket. Aprox. numbers are 100 operations/minute with over 8k ...
3
votes
1answer
223 views

SELlinux security domains

I'm studying SELinux, but I can't find any clear definition for security domains. What is a security domain and what is its difference with security context?
3
votes
3answers
237 views

Recovering data from a failing RAID 5 setup

I have a four disk RAID 5 array that is in the process of failing hard. One disk is completely dead and smartctl is telling me that a second disk is failing. All the data on the RAID is backed up, ...
0
votes
1answer
159 views

searching for sysvinit in a linux tree

This is the tree for petalinux. https://github.com/Xilinx/linux-xlnx/tree/xlnx_3.8 I am looking for sysvinit package,which contains things like init ,halt etc. When this source code is compiled we ...
3
votes
2answers
554 views

PS1 variable no longer shows coloured bash prompt

I'm running a VPS with Centos 6.5 I've setup ~/.bash_profile as in the following screenshot: It used to give me an output like this: Now that I've installed WHM/Cpanel I no longer see coloured ...
4
votes
1answer
371 views

What provides LSB virtual boot facilities for Debian?

Debian's version of Sysv init uses scripts which reference various LSB "virtual" boot facilities such as $local_fs and $network as requirements for use by insserv in setting up the boot sequence, but ...
0
votes
2answers
1k views

How to apply a patch in OpenBSD?

I have comp54.tgz installed. # cd /root && ftp http://ftp.openbsd.org/pub/OpenBSD/`uname -r`/src.tar.gz && tar -xzf /root/src.tar.gz -C /usr/src # uname -r 5.4 # pwd /usr/src # ls -la ...
1
vote
1answer
37 views

How to ascertain remaining space on an isolated partition from the command line

I was recently told by another developer that whilst diagnosing a server issue (our application could not write logs due to insufficient disk space) he was able to view remaining disk space on what he ...
0
votes
1answer
317 views

Error “ssh_exchange_identification” with Corkscrew

I'm trying to reach my ssh server (i'm behind a corporate proxy) so I tried to use Corkscrew. My ssh server is listening on port 443, I put sshd: ALL in my /etc/hosts.allow and there's nothing into my ...
3
votes
1answer
328 views

how to write a startup dependency on Internet availability?

Some of the services on my Raspberry Pi (~ Debian) depend on the availability of Internet (especially ntpd, for cryptic reasons). Specifically, the availability of a network device or a link being up ...
2
votes
2answers
141 views

locate with color

I used locate binary many time to search something on my 1TB HDD. Most of the time, I got many result and I have to read each line to get what exactly I'm looking for. It would be great if the ...
2
votes
1answer
7k views

500:Internal Server Error from CGI program

I am trying to write a CGI Program which is invoked from a HTML page . The CGI code snippet is as follows: #!/bin/bash echo "Content-type: text/html" echo "<html>" echo "<body>" ...
0
votes
2answers
72 views

Is it possible to cache external binary in a shell script?

My question, might sounds a bit strange, but this morning I read this question: Why is “echo” so much faster than “touch”? I perfectly understand the concept of built-in function, but I wonder if you ...
7
votes
2answers
8k views

How can I get xrandr to detect both nvidia cards: 2 x GTX480, triple-head?

I am running Linux Mint 16 (Petra) I am running the default driver nvidia-319 shipped with the distro I have 2x GTX480 cards I have 3 monitors Using the Nvidia driver, all monitors and GPUs are ...
0
votes
1answer
86 views

Pipe doesn't read my forked script [closed]

I have a problem. I modified a script called 'packer' a AUR-helper for Arch Linux. The problem coming when I apply my pipe, with a progress bar, doesn't show all info as I need. This is my forked ...
7
votes
1answer
2k views

Is the $HOME environment variable always set on a Linux system?

Assuming the machine is running a Linux kernel, sessions make use of the Bash shell and everything is using default configurations (no user has made any changes to config files), can we assume that ...
1
vote
1answer
66 views

Is it okay to run my system off a flash drive?

I've been running my main system off a Linux persistent LiveCD flash drive for a couple months. The drive has a 2 GiB fat32 boot partition, and a 12.91 GiB ext2 casper-rw partition. I'm ...
1
vote
1answer
338 views

`tar` with `find` with removing original file extension

I want to create tb2 files from bunch of text files like this. tar cfj $(basename ./2014_04_09.txt .txt).tb2 $(basename ./2014_04_09.txt) With this command I can create a archive file 2014_04_09.tb2 ...
103
votes
3answers
11k views

Why is “echo” so much faster than “touch”?

I'm trying to update the timestamp to the current time on all of the xml files in my directory (recursively). I'm using Mac OSX 10.8.5. On about 300,000 files, the following echo command takes 10 ...
0
votes
0answers
37 views

Need a different header path for compiling

I'm trying to update numpy, a python package, on my fresh install of debian. I have installed from source the latest version of python in /usr/local When trying to update numpy via pip, I get an ...
1
vote
2answers
1k views

HTOP nice level mismatch with the nice command?

I executed some commands with nice -20 but in htop the NI appears in red and as 19, why is this?
3
votes
3answers
3k views

Fedora 20 Heartbleed openssl fix

I am just trying to fix the Heartbleed bug associated with OpenSSL on Fedora Core 20. I am trying to follow the instructions as described here: ...
3
votes
2answers
670 views

What does tail -0a do?

In the documentation for logstash, they mention the command tail -0a I have never heard of the -a flag and I can't find any information on google, tail --help or the man pages. What is the ...
1
vote
1answer
192 views

Why does parallel slow down after a while?

I'm executing 60 scripts with GNU parallel(they all have wget commands in there)but I have noticed that after a few hours execution will slow down a bit. What could be causing this? I'm executing ...
3
votes
2answers
512 views

How to record the actual running time of a program with other programs running? [duplicate]

When timing the wall time performance of an OpenMP program on Linux while other programs are running, how can I get the actual running time?
0
votes
0answers
708 views

has someone fixed libssl.so.1.0.0 undefined symbols'SSL_load_error_strings' issue or know how to fix

looks like there's a broken libssl build which is missing items python CGI needs to work. I'm getting this error ...symbol SSL_load_error_strings, version OPENSSL_1.0.0 not defined in file ...

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