2
votes
1answer
1k views

Linux CentOS 5.5 not connecting to Network

I have installed Linux CentOS 5.5. During installation, I configured the LAN driver and gave it an IP address. After installation, I checked the network connection but it shows "not connected". I ...
2
votes
3answers
5k views

Logrotate not truncating open file

I have a system that is acting simultaneously as a test and demo platform. I'm recording a massive amount of data output by my systems that I wouldn't be recording when this is in deployment and ...
2
votes
1answer
207 views

Run SSH over a SOCKS proxy?

I need VPN-like behavior locally, without using a VPN. I've created a SOCKS proxy to a given server which is reachable from the WAN, and I want all of my traffic forwarded through that proxy so I ...
2
votes
1answer
120 views

Linux - check IPC stats

What is the best way of checking current status of different types of IPC in Linux (including uids) ? I want to inspect named pipes, half duplex pipes, unix domain sockets, signals. I know for sys V ...
2
votes
3answers
3k views

Returning only the portion of a line after a matching pattern

I have a file (file_name) which contains exactly one occurance of the string Result:, at the start of a line. I want to print all the characters after the string Result: in that line until I encounter ...
2
votes
5answers
441 views

How to find what device a file is on (and use that in a script)?

I want to find out what device my file is on so that I can use it in a script. I can get this far: $ df . Filesystem 512-blocks Used Available Capacity Mounted on /dev/disk0s2 498438976 ...
2
votes
0answers
1k views

How to create the framebuffer file node?

I'm working with a limited embedded device - Linux environment - that uses a custom DirectFB implementation to draw a user interface in its video output. I would like to exchange this method by a raw ...
2
votes
1answer
735 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 ...
2
votes
2answers
666 views

Distributing thousands of files over subfolders

I have a folder A with hundreds of thousands of files. I would like to move these files to new subfolders S_i, with, say, 100 files in each (the last folder may have less than 100 files) In other ...
2
votes
1answer
728 views

How to assign correct permissions to both webserver and svn?

I've an issue with files ownerships in unix. I have a drupal website and the "files" folder needs to be owned by "www-data" in order to let the users to upload files with php. However I'm now using ...
2
votes
1answer
421 views

chmod -R 644 ~/Documents

I recently noticed that all of the files in my ~/Documents were somehow incorrectly given executable status. This proved annoying as trying to opening any file gave me a message box saying it was ...
2
votes
2answers
1k views

How can I queue processes?

I have a surveillance camera and a program records videos when motion is detected. Basically, this program saves the video in a very heavy format. My solution was to call a script that converts the ...
2
votes
2answers
379 views

How to determine whether a linux filesystem belongs to a running system or not

I need to write a program that receives a block device as input, like /dev/sda1, and has to perform a set of operations depending on if the filesystem inside are currently running or not. We'll ...
2
votes
2answers
272 views

Why is LVM metadata backed up to /etc/lvm and not /boot?

Recent question I saw got me thinking on this particular point: If bootloader restrictions usually cause /boot to be outside LVM, why isn't this the target of LVM metadata backups? Putting it ...
2
votes
3answers
1k views

How can I securely login remotely to my Linux box over the internet?

I'm pretty much a Linux beginner, but this question has been on my mind. What's the simplest, most secure way to connect to my computer at home from work or from the library, &c? I'm running Mint ...
2
votes
1answer
1k views

Linux nuisance: /dev/stdin doesn't work with sockets

Linux has this blitheringly annoying peculiarity that /dev/stdin won't work with sockets - it is hardcoded to return ENXIO. Try this: socat TCP-OPEN:localhost:1234 EXEC:cat\ /dev/stdin,nofork That'...
2
votes
2answers
3k views

Debian - how to run a script on startup as soon as there is an internet connection ready for use?

I am running Debian 7 Wheezy and I need to start some screens on startup as soon as there is a fully functional internet connection. However, not, if the internet connection broke and was connected ...
2
votes
1answer
947 views

How to password-less log on via ssh alias

Suppose I have access to pc via a server. I can directly log-on to pc by using How do I connect to a pc through another pc using ssh Such that my .ssh/config looks like: Host short Hostname pc User ...
2
votes
3answers
407 views

How can I copy three partitions of my disk with a specific beginning and ending using dd?

Using the fdisk -l command I got the following answer: Device Boot Start End Blocks Id System /dev/sda1 * 2048 28266495 14132224 27 Hidden NTFS WinRE /dev/...
2
votes
2answers
293 views

How can I alert on completion of a long task over ssh?

My desktop is Ubuntu, which has the handy program notify-send, which pops up an alert on the desktop. It also has the following handy alias built in: $ type alert alert is aliased to `notify-send --...
2
votes
1answer
99 views

How to sort columns independently? [closed]

$ sort -t $'\t' -k 1rn,1 -k 2,2rn -k 3f,4 listaprezzi 2050 900 bananas 5 1905 700 grapes 17 250 4000 oranges 10 230 9200 ...
2
votes
1answer
4k views

Return code for curl used in a command substitution

I've script as below :- (edited) httpUrl="http://www.nnin.com" rep=$(curl -v -X POST -d "UID=username&PWD=pass" $httpUrl) status=$? if [ "$?" -eq 0 ]; then echo "Success" exit $status ...
2
votes
3answers
7k views

Allow a user to view the home directory of other users via sudo

I am new to system administration. We have a lab set up where we have a server and client machines. The client machines have LDAP users which has the work area for all the users in the centralized ...
2
votes
2answers
2k views

find: combining -path and -prune to exclude files and directories

I have a directory /srv/tftp/pxelinux.cfg and a file /etc/mtab. I want to exclude both from find. But whatever I do, either one always is not excluded find /etc /srv -path /srv/tftp/pxelinux.cfg -...
2
votes
1answer
2k views

How to enable Control key combinations for GNU screen on putty?

I am accessing a linux box via ssh using putty. Key combinations work fine when I'm not running screen. However, Ctrl key combinations do not work under a screen session. In fact, a Ctrl-any key is ...
2
votes
2answers
439 views

Using RVM with gvim without installing the ruby binary

In Arch Linux, apparently gvim requires to install ruby as a dependency. However, if I want to work with RVM, then I don't need the binary ruby installed. Can that cause problems? Can ruby be ...
2
votes
1answer
527 views

How to make PulseAudio and OSS only applications coexist on Debian Wheezy?

Before I fell back to ALSA, I had severe problems with PulseAudio deadlocks for years on my Debian system on which I am using some OSS only (requiring /dev/dsp) applications. I would like to see ...
2
votes
1answer
329 views

Command to monitor elapsed time in background?

I've been trying to find a decent way to monitor elapsed time in the shell. Basically, I'm asking for a stopwatch. The end result is easy enough to accomplish; I've seen examples of using time read, ...
2
votes
2answers
3k views

Debian - install missing man pages?

I run RaspBMC - a distro based on Raspbian, that's a custom minimal Debian for the Raspberry Pi. If I recall correctly, the man utility is NOT installed by default with RaspBMC (although I may be ...
2
votes
1answer
11k views

How to restore a Fat32 filesystem under Linux

Here is what happened: I used the Laptop and accessed some data on my usb stick. Then I closed the Laptop putting the system into sleep mode. The USB-Stick was still plugged in. After the laptop was ...
2
votes
1answer
352 views

Mount linux mount in windows (without ftp)?

I successfully mounted my external hard drive (ntfs) to /mnt/seagate. I'm using debian and the server is connected over LAN to my PC. So how can I mount my hard drive in my windows explorer without ...
2
votes
1answer
120 views

Is there any method to mount a block of memory as a filesystem in linux?

I have a question,in linux, is there any method to mount a block of memory as a filesystem? For example, in X86 architecture, when power on, I reserve a block of memory about 8 Mbytes, and then when ...
2
votes
0answers
101 views

debugging iptables when tunneling one VPN through another

I seek to tunnel one SSL VPN (F5, running on my debian laptop==client) through another (OpenVPN, running on a debian linode==server), but lose all client networking (including, e.g., ping) after the ...
2
votes
1answer
2k views

How can you run a script triggered by a joystick input?

I'm using a Raspberry Pi running Raspbian to power my arcade cabinet. I want to shut the Pi down using the sudo poweroff command without using the keyboard. I'm thinking the best way would be to ...
2
votes
2answers
347 views

How do you construct a grep & command to match a number of patterns depending on how many are provided at runtime?

I have exported some MS Word documents to plain text and use this function to parse the contents of the .txt files in the current directory: mo1 () { for i in *.txt; do echo "File: $i" grep -...
2
votes
1answer
593 views

how to Connect to Mysql only once?

I have created a shell script to connect to a DB and INSERT IPs and MACs from dhcpd.log file the scripts worked properly: #/!bin/bash #Defining Variables dhcpLogFile="/var/log/dhcpd.log" #Begin Code ...
2
votes
2answers
734 views

apt-get has unmet dependencies, but apt-get -f install doesn't solve problem

I've tried to install emacs on Ubuntu server 64bit 11.04, but it's complaining about emacs23-common. If I do: sudo apt-get -f install I still see the same problem: Errors were encountered while ...
2
votes
5answers
2k views

VIM solarized color scheme looks wrong when using tmux

I am trying to use the solarized color scheme in VIM using gnome terminal (Ubuntu). When I run vim without tmux, it looks great, see below: If I add the following commands to my .bashrc # tmux ...
2
votes
1answer
171 views

How to permanently disable root-password prompt for recovery mode, RHEL6

In the rare cases that a RHEL or CentOS 6 system is prevented from booting by (for instance) an improper shutdown, or a forced fsck-check failure on boot, the console will prompt the user for a root ...
2
votes
1answer
231 views

Find out to which directory a process is writing?

This question is NOT a duplicate of this question Find out current working directory of a running process?, because the writing directory can be different from the working directory. For example, I ...
2
votes
1answer
6k views

How to correctly configure Debian watchdog daemon for BIOS Watch Dog?

Supermicro main boards contain a BIOS feature named "Watch Dog Function". Having Debian 6.0.6 with kernel "Linux debian 2.6.32-5-amd64 #1 SMP" we did: Change BIOS "Watch Dog Function" from Disabled ...
2
votes
2answers
5k views

“lsmod |grep audio” doesn't return anything?

I am running Debian Squeeze. I installed and removed Gnome3 and reinstalled Gnome2.x (epic fail and stupidity) and in the process I have lost audio, lspci returns following # lspci | grep Audio 00:...
2
votes
2answers
338 views

What is the equivalent of apt-file in portage, if any? [duplicate]

Hunting for dependencies when compiling software from the scratch is practically unavoidable. In Debian-based Linux distributions which use the apt-get utility to manage packages, there is also a nice ...
2
votes
2answers
211 views

Difference between .xinitrc, .xsession and .xsessionrc

I found three configuration files. .xinitrc .xsession .xsessionrc I know that the first one is for using startx and the second and third are used when using a display manager. But what is the ...
2
votes
1answer
44 views

Why can file expansion work for filenames with a newline character?

$ rm Think\ Python:\ How\ to\ Think\ Like\ a\ Computer \ Scientist\ 2014.pdf rm: cannot remove ‘Think Python: How to Think Like a Computer’: No such file or directory $ Scientist 2014.pdf: command ...
2
votes
5answers
3k views

How do I disable copy permissions?

Can we set permissions, on a Linux box OR for a particular directory (Scientific Linux in my case) that, one can read files but cannot copy, move or delete them? Update: My Scenario is, We developed ...
2
votes
2answers
3k views

Why can't I use public/private key authentication with ssh on Arch Linux?

I have the following setup on an Ubuntu machine: ~/dotfiles/authorized_keys2 ~/.ssh/authorized_keys2 -> /home/wayne/dotfiles/authorized_keys2 I had the same setup on my Arch machine, but when I ...
2
votes
0answers
80 views

RedHat5 stop copy on select

At work do we use RHEL5, with Gnome 2.28.2, we are also required to do development work in RHEL5. RHEL5 have this strange feature that it will replace the clipboard with anything i highlight. This is ...
2
votes
2answers
272 views

Take copy of TTY0 text

I have some output in TTY1 that I think might hold clues as to why my last GUI session froze (CtrlAltBackspace was able to get me back to the terminal and I reloaded the GUI). However, I cannot seem ...
2
votes
1answer
79 views

How to write this replacement with condition

I want to replace now within my working directories the word -> with $\to$ if the word is not within verbatim environment. Pseudocode Replace all entriens of -> with $\to$ everywhere else but not ...

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