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• ifdown em1 Users cannot control this device. Allow users to control em1 device

  - by Eric Leschinski

  I want to allow users to control the em1 device in Linux: When I run this command: ifdown em1 em1 is the embedded ethernet card 1, I want the user to be able to turn off the ethernet card. On Fedora 17, I get this error message: Users cannot control this device I want a certain user to be able to run a certain command on Linux without giving rights to other users. What is the best way to do that?

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• Cron Job that Boots Screen at Start

  - by Pez Cuckow

  I am trying to set up a number of processes that start during boot (servers for games) with the below command as the cron item: @reboot /usr/bin/screen -fa -d -m -S NAME COMMAND However if the server crashes for what ever reason screen closes and the server doesn't get a chance to run it's auto restart (as far as I understand; screen sees no processes in the socket and so closes). Is there a way that I can get around this so screen will sit there even if nothing is running in it?

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• How to filter to runing VLC stream? (FROM CMD)

  - by Ole Jak

  so.. I esely can broadcast my web cam with VLC using command lines like this (I use Windows) "C:\Program Files (x86)\VideoLAN\VLC\vlc.exe" -vvv -I --dshow-vdev="Logitech QuickCam Express / Go" dshow:// --sout When I paste command into CMD and hit enter it starts streaming (all is fine - I can play it) How can I now for example add brightness or any other filter to that stream from CMD?

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• Windows 7 batch files: How to write string to text file without carriage return AND trailing space?

  - by oscilatingcretin

  I am trying to have my batch file write a string of text to a text file. At first, the command I was using was writing an extra carriage return to the end of the string, but I found this command that prevented that: echo|set /p=hello>hello.txt However, now it's putting a trailing space at the end. I need only the string I specify to be written without any extra characters. Is this possible?

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• Leave bash script running on remote terminal while not logged in?

  - by mechko

  I have a bash script that takes several hours to run. While it's running, I would like to do other things, which may involve logging out or disconnecting from the internet (my script runs network tests on various computers). I understand that there is a command that would allow me to run my tests from a remote terminal and logout of the terminal while it runs. Does anyone know what this command is? Thanks

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• Is it possible to toggle hidden files without relaunching Finder?

  - by Andrei

  There are several ways how to toggle hidden files - via a shell command, or AppleScript, or Automator action, or even a Dashboard widget. All of them close and reopen Finder windows, which is quite annoying. On the other hand, for the Open File dialog one can easily toggle hidden files by pressing Command+Shift+Period. Is it possible to avoid relaunching Finder?

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• trouble using a scheduled task to run a shell script (ubuntu linux)

  - by John Kube

  I'm trying to create a scheduled task that runs a shell script recurrently, and I'm having some trouble getting it to work. I give it the following command to run every minute: ~/Desktop/foo/my_script But it doesn't ever run. (This command runs the shell script through the terminal no problem.) Any ideas what I'm doing wrong? Thanks!

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• Launch Nginx on startup

  - by Richard Schneeman

  I was able to install and run nginx, and passenger but i'm not able to have nginx come up whenever i reboot my server. To start the nginx process i just type in sudo /opt/nginx/sbin/nginx. From my understanding anything i put in /etc/init.d with ubuntu hardy will be execute. Does anyone know the command that will mimic this command line call? sudo /opt/nginx/sbin/nginx

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• stdout and stderr of script doesn't get redirected when executed by cron

  - by gletscher

  Hi, when I execute ./script &>> log.txt I get a nice logfile, but if I have the same command executed by cron, lets say the crontab looks like this: * * * * * '/home/user/script &>> /home/user/log.txt' the log.txt will just be empty, I tried " and ' and ` and no ticks to enclose the command, any idea why the streams won't get written into the file?

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• ip route add HOMEIP via SERVERIP disconnects me from ssh

  - by Arya

  I want to use a vpn connection on my Debian server but I get disconnected from ssh if I connect to the vpn. I thought by using the "ip route add" I can prevent getting disconnected from my server and it will continue to use the main connection for communication between my computer and the server, and the vpn for communication with other ips. This is the command I use ip route add PUBLICHOMEIP via PUBLICSERVERIP But I get disconnected after the "ip route add" command too. Am I making a mistake anywhere?

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• How can I recover my Transcend pendrive when both the used space and free space are 0 bytes?

  - by Debabratta

  I have an Transcend pendrive, and when I connect it and double click it to explore, it is showing the error: Please insert a disk into drive Also In the properties field it is showing File system- Unknown Used space- 0 bytes free space- 0 bytes capacity- 0 bytes I tried to format it using using the command prompt but it is not showing in the list disk command. It is also not showing in the Disk Management.

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• sed how to ignore remarked lines

  - by yael

  hi all I have the following sed command in my script sed -i "/$PARAM/s/$OLD/$BEW/g" $FILE this sed command replace the OLD value to new in the line that PARAMETER exsit but I need also to ignore the "#" lines how it can possible to change the sed syntax in order to ignore "#" lines?

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• Different Results of Scanning Wireless Networks

  - by Tim

  Hi, I found that under Ubuntu, WICD and command "/sbin/iwlist wlan0 scan" give a little different list of wireless networks. Windows 7 also gives a slightly different list. For example, there is one shown in WICD but not in the command nor in Windows 7. I wonder why? How to get a complete list of wireless networks? Thanks and regards!

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• "watching" a log on FreeBSD vs Linux

  - by Cory J

  On Linux systems I can watch -n1 tail /var/log/whatever.log or watch -n1 grep somestuff /var/log/whatever.log To show updates to a log every 1 seconds. On FreeBSD however, the watch command does something else entirely. Who knows a good FreeBSD command for what I'm trying to do? =)

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• SSH port forwarding. Connection refused [closed]

  - by Kein

  I want to make a port forward from my public server to my home pc, to connect through ssh. What have I done wrong? From home pc I run command: ssh -R 8022:127.0.0.1:22 remote.host Now when I try to connect with: ssh remote.host -p 8022 I get error "Connection refused" But when I connect to remote.host through ssh, and try to run: ssh localhost -p 8022 It connects to my home PC. How I can connect to home with one simple command? ssh remote.host -p 8022

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• Oracle sysman password reset and enterprise manager

  - by Aboxy

  We are running oracle 10g.yesterday we had to reset sysman(and all other sys acounts)user with alter user command. Password change command worked by oracle enterprise manager does not see the database running. As per oracle docs,we did change the password(and encryption setting) and restarted the dbconsole service. Password does get encrypted after restarted but em still does not see the database online. Are we missing any other important step? Thanks Aboxy

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• Updating Python on Ubuntu system

  - by efficiencyIsBliss

  I want to update the Python build on my Linux box, but the only way I know how to do it is uninstalling the current version and installing the new one. My system is already up to date (I updated yesterday). I wanted to know if there is a way to update a specific program from the command line, like sudo apt-get update <program-name>. I know this command doesn't exist, but I'm hoping something equivalent does.

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• Where is the root

  - by smwikipedia

  I read the manual page of the "mount" command, at it reads as below: All files accessible in a Unix system are arranged in one big tree, the file hierarchy, rooted at /. These files can be spread out over several devices. The mount command serves to attach the file system found on some device to the big file tree. My question is: Where is this "big tree" located?

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• changing date in solaris machine.......

  - by RBA

  Hi, I am in process of updating the Solaris Machine's System Date and Time.... I am using the following command.... Loginned as root........ # date -u 062800002010 Mon Jun 28 00:00:00 GMT 2010 # date Sun Feb 28 05:30:02 IST 2010 As seen above,, when i fire the "date" command again.... the new updated date doesn't get reflected......... Please let me know on what could be the issue....... Thanks....

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• Temporarily configuring a default gateway (Windows Vista)

  - by justintime

  I would like to change the default gateway for the wired ethernet port on my laptop- the DHCP server is giving the wrong one. I would like it to revert to the existing config on a reboot. I would prefer a command line way of doing it - so I can easily repeat the command as needed. Do I need ipconfig or route - both of which confuse me.

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• How to get the Date in a batch file in a predictable format?

  - by AngryHacker

  In a batch file I need to extract a month, day, year from the date command. So I used the following, which essentially parses the Date command to extract its sub strings into a variable: set Day=%Date:~3,2% set Mth=%Date:~0,2% set Yr=%Date:~6,4% This is all great, but if I deploy this batch file to a machine with a different regional/country settings, it fails because month, day and year are in different locations. How can I extract month, day and year regardless of the date format?

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• Fail to set a new location of _viminfo on Windows

  - by Elderry

  I am trying to move _viminfo out of my home folder to make it simpler. So I added this to my _vimrc: set viminfo+=n~\\AppBackup\\Vim\\_viminfo However it's useless, Vim still create _viminfo in my home folder. Then I manually input the command above. This time it works fine, so I am sure the command itself is valid. How should I solve this problem for now? To be more specific, I am using GVim 7.4 on Windows 8.1.

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• How to change the default browser from the registry? [closed]

  - by msbg

  Possible Duplicate: Which registry keys need to be edited to change the default browser? I am trying to change the default browser opened from start ? run or win + r. I have set both HKEY_CLASSES_ROOT\http\shell\open\command and HKEY_LOCAL_MACHINE\SOFTWARE\Classes\http\shell\open\command From "C:\Program Files\Internet Explorer\iexplore.exe" %1 To "C:\Program Files (x86)\Mozilla Firefox\firefox.exe" %1 But running an http address still opens Internet Explorer not Firefox. How do I change this?

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• Running multiple versions of PostgreSQL on the same Ubuntu server

  - by user51938

  I have PostgreSQL 8.4 and 9.0 running on the same server (Ubuntu Lucid). I installed them both via apt-get (8.4 with the default package sources, and 9.0 after adding the ppa from https://launchpad.net/~pitti/+archive/postgresql). When I run a command like "createdb" from the command line or start up the "psql" shell, PostgreSQL version 8.4 is used by default on my system. So, how do I force these commands to use PostgreSQL 9.0 instead of 8.4?

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• Time server for Windows 2003 domain

  - by Dave

  Am I correct that the NET TIME command should return the time from the PDC for the domain? If so, the issue we are contending with is that NET TIME command returns \randomfileserver. How do I reset time server for domain to be the PDC?

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