Monthly Archives: July 2010

0

Forcing a Web Browser to Save a File instead of Streaming it

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I was having a dickens of a time, trying to force a browser make the user save the file, instead of trying to stream it. Here’s how to do it.

The original article is here.

1. in the directory where the file is located, we need to create a .htaccess file. So using the editor of your choice, create a filed name .htaccess (yes the period in front is important! It’s a hidden file.)


AddType application/octet-stream .wma

2. Now change the permissions on the file. Read and Write for the owner, and Read access for everyone else.


sudo chmod 640 .htaccess

it should like like:

-rw-rw—- 1 nwayno nwayno 38 2010-07-25 20:48 .htaccess

3. Restart the ftp server. If it’s standalone mode:


sudo service vsftpd restart

If vsftpd runs under xinetd (like I do), it will get the changes automatically since each new ftp session is a new process. (thanks Joe!)

4. Now when you try to ftp the file, such as:

ftp://servername/directory/filename.ext
(substitute your own information)

You will be prompted to save the file, instead of trying to stream it.

Thanks Loni

6

Getting Ubuntu 10.04 Video/Audio to work with an Intel 82815 Chipset

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The built in speakers on the compaq desktop pro, while they work with WIN XP, don’t work with Ubuntu 10.04. However, if you plugin a set of speakers or earphones into the sound output jack on the back (green) works perfectly.

After installing the LIVECD onto the Compaq Desktop Pro, when I rebooted, everything looked okay. I run the updates. Then rebooted AFTER the updates, and then ran into trouble.

Nothing I tried worked! Then I found the secret! You need to create at LEAST 2 admin accounts Before doing the updates. One that you will do the updates after installing the LIVECD, and one that you will use AFTER you do the updates.

Here’s what’s going on. After installing the LIVED CD the monitor resolution is set to 800×600.

However, after installing the updates, the resolution switches to 1024×768. So that account you did the updates with: worthless!

If you logon after the updates with the second account, your good to go. But you need the snippet from here

I created the following file in /etc/X11/xorg.conf RIGHT AFTER DOING THE UPDATES!

DO NOT TRY TO CHANGE THE RESOLUTION TO ANYTHING BUT 1024×768. IT JUST WON’T WORK!


#
# /etc/X11/xorg.conf
#
Section "Device"
Identifier "Intel Corporation 82815 CGC [Chipset Graphics Controller]"
Driver "intel"
BusID "PCI:0:2:0"
EndSection
#
Section "Monitor"
Identifier "Generic Monitor"
Option "DPMS"
HorizSync 31.5-48.5
VertRefresh 40-70
EndSection
#
Section "Screen"
Identifier "Default Screen"
Device "Intel Corporation 82815 CGC [Chipset Graphics Controller]"
Monitor "Generic Monitor"
DefaultDepth 16
SubSection "Display"
Modes "1024x768" "800x600" "640x480"
EndSubSection
EndSection

If you hose the resolution you can try this.


xrandr --output LVDS --mode 1024x768

1

Recovering Ubuntu/Debian Linux after a Windows Install/Hiccup

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Courtesy Jordan-U from #ubuntu (freenode.net)

Dual booting (Windows/Linux) can cause some unique situations. Windows will try to assert itself as the only game in town, which can cause grub to go into an endless boot loop. Here’s an easy way to fix grub after a Windows Install/Hiccup.

1. First boot off of a livecd You can get one here.

NOTE: 32 BIT SYSTEMS REQUIRE A 32 BIT LIVECD. 64 BIT SYSTEMS REQUIRE A 64 BIT CD TO CHROOT CORRECTLY!

2. Go to a terminal window. Let’s first mount the Linux Partition.

First do:


sudo blkid

You will see output that looks like:

ny@Px:~$ sudo blkid
/dev/sda1: UUID=”C2B0DA3DB0DA379D” TYPE=”ntfs”
/dev/sda2: UUID=”0408bd37-4a4d-4dac-a27e-408816aecd1e” TYPE=”swap”
/dev/sda3: LABEL=”waynolnx” UUID=”338b39c2-dd06-4aab-905c-98d9d01a3240″ TYPE=”ext4″

NOTE: If you are running of the livecd, then you will need the sudo infront!

So we’re looking for /dev/sda3

NOTE: YMMV APPLIES! (Your Mileage May Vary). Mine happens to be sda3, yours might be different! Your’s might be sda5.


sudo mount /dev/sda3 /mnt

3. We are going to mount major Linux access points lets do them one at a time. First the Linux Devices Files. The –bind allows us to mount a subtree somewhere else, so it’s available in both places.


sudo mount --bind /dev/ /mnt/dev

4. Now the proc files. The proc system allows files to be generated dymanically.


sudo mount --bind /proc/ /mnt/proc

5. Now let’s mount /sys. /sys exports information from the kernel to the user space.


sudo mount --bind /sys /mnt/sys

6. Chroot to the device that we earlier mounted. Chroot (change root) changes the Linux root to be the device we mounted earlier. Note the mount point: /mnt


sudo chroot /mnt

If you get something like:

chroot: cannot run command `/bin/bash’: Exec format error

It might be because you are using a 32 bit live cd on a 64 bit system, or vice versa.

The prompt MAY change to an # (octothorpe) — no cause for alarm.

7. Finally re-install grub into the MBR (Master Boot Record)


sudo grub-install /dev/sda

Reboot and all the operating systems, Linux and Windows should be available.

0

Removable USB devices and fstab settings

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I have a 1 t/b back up drive, which is a USB drive.

However, the device names seem to change automagically.

Power interruptions, or even things like Virtual Box will cause the drive to dismount and re-mount, changing the device name, and causing havoc elsewhere for things like my music and ftp site which are stored on this device.

So, what’s the easy way to fix this? Well thanks to Loni, here’s what we did:

1. Change directory so we can get information by UUID. (Universally Unique Identifier)


cd /dev/disk/by-uuid

2. Look at the UUID’s in the system:


ls -l

You will get output that looks like this:

@Homer:/dev/disk/by-uuid$ ls -l
total 0
lrwxrwxrwx 1 root root 10 2010-07-08 00:21 14ff50b3-49c0-4dbb-a392-55fb94a7730f -> ../../sdb2
lrwxrwxrwx 1 root root 10 2010-07-07 17:21 5ed81b0d-ae9a-41b1-b4c7-02b500b94bea -> ../../sda5
lrwxrwxrwx 1 root root 10 2010-07-07 17:21 92569F58569F3C43 -> ../../sda1
lrwxrwxrwx 1 root root 10 2010-07-07 17:21 949CA48C9CA46A86 -> ../../sda3
lrwxrwxrwx 1 root root 10 2010-07-07 17:21 c07c1084-ff98-49dc-87c7-672651dc4d2e -> ../../sda4
lrwxrwxrwx 1 root root 10 2010-07-08 00:21 FC1268B212687414 -> ../../sdb1

4. Now let’s edit the Linux file structure table, fstab

Note any thing with a # in it is a comment does not need to be coded!


cd /etc

5. First let’s backup the file in case we make mistake (always have a path back to the way it was, before you messed it up!) More complete details are here.


sudo cp fstab fstab.bkup

6. Now edit the file:


sudo nano fstab

OR


gksudo gedit fstab # use gedit

7. add the following similar lines:


UUID=14ff50b3-49c0-4dbb-a392-55fb94a7730f /waynobfd ext4 rw 0 0
#
UUID=FC1268B212687414 /waynontfs ntfs rw,nosuid,nodev,allow_other,blksize=4096 0 0

The first line above, mounts an ext4 partition by UUID (from the information we obtained before) and gives it the mount point of /waynobfd (previously created with the mkdir command.)

The second line above mounts an ntfs partition, called waynontfs. Handy for use with Windows.

By using UUID, if the device changes due to things like VirtualBox or maybe a power hiccup that affects the drive, though the device may change, the mount point will always be correct.

End of Problems! Thanks Loni!

1

Fixing gnome-typing-monitor in Ubuntu 10.04/10.10

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For those of us who need to take breaks from our computer (mine for medical reasons), the gnome-typing-monitor is indispensable.

However, it does NOT work in Ubuntu 10.04 (lucid) or 10.10 (meerkat) . Which for me, was a show stopper. I have Deep Vein Thrombosis and so I can’t sit for extended periods of time.

Ubuntu 10.04 Bug #565757 (gnome-typing-monitor)

This solution, fixes the problem. You will need to obtain the gnome-typing monitor from version 9.10. You can find 32 and 64 bit versions here.

Note that you will need to change the permissions (chmod) and ownership (chown) once you have downloaded and moved the file.

it needs to look like:

ls -l gnome-typing-monitor
-rwxr-xr-x 1 root root 34920 2010-07-07 23:53 gnome-typing-monitor

note that in the following example ‘#’ is the comment character.
You don’t code that or anything that follows:

1. Let’s go to the directory where the gnome-typing-monitor is stored:


cd /usr/bin

2. Let’s create a backup copy of the programme.


sudo cp gnome-typing-monitor gnome-typing-monitor_org

3. Copy the programme from our home directory (or where ever you downloaded it to, to /usr/bin


sudo cp ~/gnome-typing-monitor /usr/bin

4. Change the owner on the file back to root.


sudo chown root gnome-typing-monitor

5. Change the file permissions.


sudo chown 755 gnome-typing-monitor #change the permissions on the file (rwx for root, rx for group and world)

Now we have to fix gconf we do that by:

1. Start gconf-editor in the shell


gconf-editor

2. Go to desktop

3. gnome

4. typing break

Click on “enabled”
That’s what worked for me

Joe

gconf editor changes

Now I can finally upgrade from 9.10 (karmic) to 10.XX

Thanks Joe!