ali129's questions

After trying to access my Linux partition from Windows operating system, my Linux partition is now truncated to a size 1K byte and I am no longer able to mount that partition.

"fdisk" shows the size of my partition 244.1G which is correct, while "testdisk" and "lsblk" show 1K byte. My corrupted partition is sdd3.

I tried to fix the issue using the fsck command without any success:

~$ sudo fsck.ext4 -f /dev/sdd3
e2fsck 1.45.5 (07-Jan-2020)
fsck.ext4: Attempt to read block from filesystem resulted in short read while trying to open /dev/sdd3
Could this be a zero-length partition?

Here is the output of the "fdisk":

Disk /dev/sdd: 1.84 TiB, 2000398934016 bytes, 3907029168 sectors
Disk model: WDC WD20EZRZ-00Z
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 4096 bytes
I/O size (minimum/optimal): 4096 bytes / 4096 bytes
Disklabel type: dos
Disk identifier: 0x00001144

Device     Boot      Start        End    Sectors   Size Id Type
/dev/sdd1             2048 1638402047 1638400000 781.3G  7 HPFS/NTFS/exFAT
/dev/sdd2       1638402048 2150402047  512000000 244.1G  7 HPFS/NTFS/exFAT
/dev/sdd3       2150402048 2662402047  512000000 244.1G 85 Linux extended
/dev/sdd4       2662402048 3907028991 1244626944 593.5G  7 HPFS/NTFS/exFAT

and here is the output of "lsblk":

NAME   MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT
sda      8:0    0   3.7T  0 disk 
└─sda1   8:1    0   3.7T  0 part /media/ali/Drive I
sdd      8:48   0   1.8T  0 disk 
├─sdd1   8:49   0 781.3G  0 part /media/ali/Drive F
├─sdd2   8:50   0 244.1G  0 part /media/ali/BE0AE9C60AE97C31
├─sdd3   8:51   0     1K  0 part 
└─sdd4   8:52   0 593.5G  0 part /media/ali/Drive E

It seems that the data on my partition is intact since I'm able to access all my files using magic recovery. when accessing my partition using magic recovery even all my folders' structures are preserved.

any idea to fix the issue is appreciated.

I recently have upgraded to Ubuntu 20.04. Everything works fine except that every time I want to connect to a VPN network with openconnect I have to enter My username and It asks me to validate the certificate. I connect to VPN network using a gnome plugin for openconnect: "network-manager-openconnect-gnome". This can be very frustrating since I have to switch between VPN connection and normal Internet connection frequently.

Because of internet connection speed limitation i prefer installing packages offline. I usually obtain required packages from a system with the same os installed. But when I install programs this way I usually ended up with broken packages on my system which is not fixable with the following:

sudo apt-get update
sudo apt-get install -f 

Sometimes the last command wants to delete grub or some obviously essential packages from my system! or after performing the last command i can't install some programs for example:

The following packages have unmet dependencies:
 mysql-client : Depends: mysql-client-5.5 but it is not going to be installed
E: Unable to correct problems, you have held broken packages.

how should i fix such problems? is there any way to save system status before installing programs this way and restore system to its previous state if installing process doesn't go well? is there any way to fix such problems manually without depending on package manager?

I wish in Ubuntu it were possible to install programs isolated from each other like it is in windows.

I have 64 bit ubuntu 12.04 on my system. with nvidia graphic card. i installed some packages off line by using dpkg and also some programs from source code. now i have problem installing wine on my system. i have tried these commands:

• sudo apt-add-repository ppa:ubuntu-wine/ppa
• sudo apt-get update
• sudo apt-get install wine1.7

but it gives me this:

The following information may help to resolve the situation:

The following packages have unmet dependencies:
 wine1.7 : Depends: wine1.7-i386 (= 1:1.7.12-0ubuntu1)
E: Unable to correct problems, you have held broken packages.

i have also tried aptitude:

sudo aptitude install wine1.7

one of the solution it suggests is this :

     Remove the following packages:                                   
1)      empathy                                                        
2)      espeak                                                         
3)      ffmpeg                                                         
4)      gnome-media                                                    
5)      gstreamer0.10-plugins-good                                     
6)      indicator-sound                                                
7)      libasound2-plugins                                             
8)      libav-tools                                                    
9)      libavdevice53                                                  
10)     libcanberra-pulse                                              
11)     libespeak1                                                     
12)     libfarstream-0.1-0                                             
13)     libfluidsynth-dev                                              
14)     libfluidsynth1                                                 
15)     libjack-dev                                                    
16)     libjack0                                                       
17)     libportaudio2                                                  
18)     libpurple0                                                     
19)     libtelepathy-farstream2                                        
.
.
.                                     
      Install the following packages:                                  
40)     libcanberra-gstreamer [0.28-3ubuntu3 (precise)]                

      Keep the following packages at their current version:            
.
.
.                              
63)     wine1.7 [Not Installed]                                        
64)     wine1.7-amd64 [Not Installed]                                  
65)     wine1.7-i386:i386 [Not Installed]                              

      Leave the following dependencies unresolved:                     
.
.
.
84)     wine1.7-amd64 recommends libasound2-plugins                    
85)     wine1.7-i386:i386 recommends libasound2-plugins:i386           
86)     wine1.7-i386:i386 recommends libsane:i386                      
87)     wine1.7-i386:i386 recommends libxcomposite1:i386               
88)     wine1.7-i386:i386 recommends libxcursor1:i386                  
89)     wine1.7-i386:i386 recommends libxi6:i386                       
90)     wine1.7-i386:i386 recommends libxinerama1:i386                 
91)     wine1.7-i386:i386 recommends libxrandr2:i386                   
92)     wine1.7-i386:i386 recommends libxrender1:i386                  
93)     wine1.7-i386:i386 recommends libxt6:i386                       
94)     wine1.7-i386:i386 recommends libxxf86vm1:i386  

as it shows aptitude is going to delete many unrelated packages and not installing wine. i don't know how resolve this dependecy problem. i could install wine on newly installed ubuntu but in my case i don't know what packages are causing this problem. i also tried other version of wine such as wine wine1.6 wine1.4 wine1.3. i also tried installing wine from source code but it only can run non gui applications.

VLC player and totem video player can't play MSS2 video encoded video files but i could play them under Ubuntu by compiling FFMPEG library. now ffplay can play these files. My question is if there is any way to add these codecs to system so that vlc player or totem video player can also play these files. i tried "sudo make install" in my ffmpeg folder but it seems it has no effect on system codecs. thank you.

I want to play .wmv files on Ubuntu, but it seems these files are proprietary and are not playable under Windows. So downloaded the ffmpeg source code and compiled it. Now, ffmplay is able to play .wmv files. I want to know how I can use ffmpeg codecs with VLC player, or with Ubuntu's default video player.