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I'm not sure if this is the right place for this question. I'm running Ubuntu Server 10.04 LTS. This machine is continuously acquiring data in real time and adding snippets of data to various of tens of thousands of files. From time to time, I have a bash program read all the files in turn and...

I'm going bananas ! I did a clean installation of Ubuntu 12.10 SERVER. I get the initial screen, but then it says "entering power save" and the screen goes black / blank. I can't turn on the screen for love or money. I know the machine is running because I can SSH into it. I tried changing the...

I have a bash script that is supposed to process the ten last lines, or fewer in files with fewer than ten lines, of a text file. I use 'tail' to read these lines into a new text file, which I then read into an array. There's a problem when the file being read has fewer than ten lines. The...

I'm building a wireless access point using Ubuntu Server 10.04 LTS and an Atheros AR9287 wireless network interface card. I want to detect when mobile devices scan for wireless access points and I want to maximize the frequency with which they do so. I do not want to allow them to communicate...

How can I get a message when my public dynamic IP address changes ? I need the message with as small a delay as possible from the moment when the public IP address changes. I'm running Ubuntu Server 10.04 LTS. I assume my machine has to be the Internet gateway router and have two network ports...

I place an image map over live M-JPEG video. It works in all browsers except when I display the video with a Java applet. Initially I thought it was just an IE problem, but it also occurs in other browsers when the video is displayed by a Java applet. There's no problem if I display the video...

BODY onload="initScript();" won't execute my initScript, apparently because my page immediately loads a live M-JPEG video stream and thus the page never finishes loading all of the images. I've tried invoking initScript at the bottom of my JS functions, but sometimes it fires before the page...

Hello, I am using Ubuntu Server 10.04 LTS. I have a problem specifying a directory within a bash script that I run via a symbolic link. I start the task using a symbolic link to it in /etc/cron.hourly/. The scripts that I want to run are in /var/www/name/cgi-bin/ and data each one needs are in...

I want to control when various partitions are file system checked so I can always boot quickly and so I can e2fsck /home according to a calendar even if the machine does not reboot often. I have created /home as a separate partition that has most of the disk space. I will force a fsck of /home...

I need to run Ubuntu Server 10.x machines with TB disks that use solar power. I need to choose a file system that handles frequent power loss well, especially at the worst time -- when file system checks are running. I've looked at ext4 with data=journal and Reiserfs, but I would like input on...

My mainboard died, so I replaced it with an identical one. I moved the hard drive to the new mainboard. The machine boots and runs ok except that the network interface does not work anymore. ifdown and ifup report that no network interface is present. lspci sees the network interface hardware...

I have a problem setting up proxying on apache2. It works fine for graphics in the web pages, so the core mechanism is running, but it is not returning textual values from web pages. I'm running Ubuntu Server 10.04 and have set up symbolic links from /etc/apache2/mods-enabled to...

I'm running Ubuntu Server 10.04. The ###!!! documentation for wget neglects to mention that paths on the server are relative to /home/ftp. So when you try to wget filename.txt from ftp://1.2.3.4/filename.txt, it is really coming from ftp://1.2.3.4/home/ftp/filename.txt. I wasted hours trying to...

I installed ecryptfs and encrypted /root/name1/name2. Somehow, I have multiple instances of it and can't unmount any of them. Also, I can't log in as root anymore (yes, I setup a root login.) When I execute sudo umount /root/name1/name2, the system hangs up. Earlier, it said I had multiple...

I need to put unmanned Ubuntu 10.04 servers in the field. I would like to encrypt the hard drive so its contents can't be copied if a server is stolen. There's a disk encryption option in the Ubuntu installer that I thought might be useful. But, since the server is unmanned, how does the...

The mainboard (Intel D945GSEJT) in an Ubuntu Server 10.04 machine was damaged, so we replaced it. But now the NIC (built-in Realtek RTL8111DL) won't work any more. lspci lists the NIC, and the NIC is enabled in BIOS. We tried turning off the NIC in BIOS, and lspci did not list it. So we turned...

I keep having problems with some remote client machines trying to connect to my OpenVPN server using UDP. I've set up a second instance of OpenVPN on my server to receive TCP. The problem is that I can't figure out how to have both instances assign clients to share the same network subnet so...

I upgraded two Intel D945GCLF2 machines from Ubuntu Server 8.04 LTS to 10.04 LTS. I upgraded BIOS to the latest version (April 2010), set the size of the Internal Graphics Display (IGD) memory from 128 MB to 256 MB, and installed all the latest updates to 8.04, as recommended in several forums...

I'm running Apache2 on Ubuntu 8.04. This machine is accessible from the Internet and also hosts an OpenVPN server. I need users on the Internet to be able to access Apache2 servers that are running behind my firewall and are only accessible via my VPN. I'm having trouble setting up proxying on...

Hello, I'm calling this a firewall problem because I don't know what else to call it. My machine will not accept any incoming connection requests and will not respond to ping. It acts as if a firewall were rejecting all incoming connection requests. However, all services are working because I...