Mohammad Moghimi's questions

Let me explain the configuration. There are three machines (1) my laptop (2) my PC behind the NAT (3) my aws instance with public address. I'm trying to access (2) from (1).

I did this:

pc$ ssh -R 2222:localhost:20 aws_user@aws_ip

Now I can do the following.

laptop$ ssh aws_user@aws_ip
aws$ ssh -p2222 pc_user@localhost 

That's perfect. However I cannot ssh from my laptop to the PC through my bridge machine (aws). Like this.

laptop$ ssh -2531 pc_user@aws_ip
ssh: connect to host aws_ip port 2222: Connection refused

netstat -a spills the following:

tcp        0      0 localhost:2222          *:*                     LISTEN
tcp        0      0 localhost:48164         localhost:2222          ESTABLISHED
tcp        0      0 localhost:2222          localhost:48164         ESTABLISHED
tcp6       0      0 ip6-localhost:2222      [::]:*                  LISTEN

And all the ports are open on the aws machine. The following failed as well.

ssh -R 2222:*:22

I'm trying to remove cuda6.5 from my computer. There is no installed package with "cuda" in its name.

dpkg --get-selections | grep -v deinstall | grep cuda

outputs nothing

but ldconfig shows these libraries. ldconfig -p | grep cuda libicudata.so.52 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libicudata.so.52 libicudata.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libicudata.so libcuda.so.1 (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libcuda.so.1 libcuda.so.1 (libc6) => /usr/lib/i386-linux-gnu/libcuda.so.1 libcuda.so (libc6,x86-64) => /usr/lib/x86_64-linux-gnu/libcuda.so libcuda.so (libc6) => /usr/lib/i386-linux-gnu/libcuda.so

I don't know which package installed them.

dpkg -S does not find anything either.

dpkg -S /usr/lib/i386-linux-gnu/libcuda.so.1
dpkg-query: no path found matching pattern /usr/lib/i386-linux-gnu/libcuda.so.1

apt-file search /libcuda.so output is

libcuda1-304: /usr/lib/i386-linux-gnu/libcuda.so
libcuda1-304: /usr/lib/i386-linux-gnu/libcuda.so.1
libcuda1-304: /usr/lib/i386-linux-gnu/libcuda.so.304.117
libcuda1-304: /usr/lib/i386-linux-gnu/libcuda.so.304.125
libcuda1-304: /usr/lib/x86_64-linux-gnu/libcuda.so
libcuda1-304: /usr/lib/x86_64-linux-gnu/libcuda.so.1
libcuda1-304: /usr/lib/x86_64-linux-gnu/libcuda.so.304.117
libcuda1-304: /usr/lib/x86_64-linux-gnu/libcuda.so.304.125
libcuda1-304-updates: /usr/lib/i386-linux-gnu/libcuda.so
libcuda1-304-updates: /usr/lib/i386-linux-gnu/libcuda.so.1
libcuda1-304-updates: /usr/lib/i386-linux-gnu/libcuda.so.304.117
libcuda1-304-updates: /usr/lib/i386-linux-gnu/libcuda.so.304.125
libcuda1-304-updates: /usr/lib/x86_64-linux-gnu/libcuda.so
libcuda1-304-updates: /usr/lib/x86_64-linux-gnu/libcuda.so.1
libcuda1-304-updates: /usr/lib/x86_64-linux-gnu/libcuda.so.304.117
libcuda1-304-updates: /usr/lib/x86_64-linux-gnu/libcuda.so.304.125
libcuda1-331: /usr/lib/i386-linux-gnu/libcuda.so
libcuda1-331: /usr/lib/i386-linux-gnu/libcuda.so.1
libcuda1-331: /usr/lib/i386-linux-gnu/libcuda.so.331.113
libcuda1-331: /usr/lib/i386-linux-gnu/libcuda.so.331.38
libcuda1-331: /usr/lib/x86_64-linux-gnu/libcuda.so
libcuda1-331: /usr/lib/x86_64-linux-gnu/libcuda.so.1
libcuda1-331: /usr/lib/x86_64-linux-gnu/libcuda.so.331.113
libcuda1-331: /usr/lib/x86_64-linux-gnu/libcuda.so.331.38
libcuda1-331-updates: /usr/lib/i386-linux-gnu/libcuda.so
libcuda1-331-updates: /usr/lib/i386-linux-gnu/libcuda.so.1
libcuda1-331-updates: /usr/lib/i386-linux-gnu/libcuda.so.331.113
libcuda1-331-updates: /usr/lib/i386-linux-gnu/libcuda.so.331.38
libcuda1-331-updates: /usr/lib/x86_64-linux-gnu/libcuda.so
libcuda1-331-updates: /usr/lib/x86_64-linux-gnu/libcuda.so.1
libcuda1-331-updates: /usr/lib/x86_64-linux-gnu/libcuda.so.331.113
libcuda1-331-updates: /usr/lib/x86_64-linux-gnu/libcuda.so.331.38

I have a .7z file containing ~360,000 images in multiple directories. I'd like to convert it to a .tar so that I can open it in another computer. Is there a better way than extracting it to files and compressing them again? Is it possible to do the conversion directly?

I removed pulseaudio and alsa-base. I think some of the gnome ui packages were dependent on those two and are removed. So now, after a restart, when I log in it goes in and logs out automatically.

What should I install? Here is a picture of my screen before logging in. Note that the title bar of the wifi connection window is not showing up. I think if I solve this it should resolve the issue.

I'm trying to install cuda6.5 using the .run file on an amazon aws gpu instance. I'm getting this error. I'm not sure what the kernel source path is. I did install it with apt-get install linux-source and apt-get source linux-image-$(uname -r) Does anyone know how to fix this issue? I tried --kernel-source-path=/usr/src/linux-source-3.13.0 but it didn't work even though the sources are there.

The driver installation is unable to locate the kernel source. Please make sure that the kernel source packages are installed and set up correctly.
If you know that the kernel source packages are installed and set up correctly, you may pass the location of the kernel source with the '--kernel-source-path' flag.

I have ubuntu 12.04 and I'm not able to allow certain port in my firewall. So I basically said I will allow everything but it's still not working. Please help. nmap on this machine from other machine says:

$ nmap host_name
Not shown: 996 closed ports
PORT    STATE SERVICE
22/tcp  open  ssh
80/tcp  open  http
139/tcp open  netbios-ssn
445/tcp open  microsoft-ds

and here is nmap from the same machine

$ nmap localhost

Starting Nmap 5.21 ( http://nmap.org ) at 2014-01-21 11:14 PST
Nmap scan report for localhost (127.0.0.1)
Host is up (0.000080s latency).
Not shown: 991 closed ports
PORT     STATE SERVICE
22/tcp   open  ssh
25/tcp   open  smtp
53/tcp   open  domain
80/tcp   open  http
139/tcp  open  netbios-ssn
445/tcp  open  microsoft-ds
631/tcp  open  ipp
3306/tcp open  mysql
8000/tcp open  http-alt

Nmap done: 1 IP address (1 host up) scanned in 0.04 seconds

I want to open port 8000 and here is the output of iptables.

# iptables -L -n
Chain INPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0           

Chain FORWARD (policy ACCEPT)
target     prot opt source               destination         

Chain OUTPUT (policy ACCEPT)
target     prot opt source               destination         
ACCEPT     all  --  0.0.0.0/0            0.0.0.0/0  

mmoghimi@titan:~$ sudo netstat -tulpn
Active Internet connections (only servers)
Proto Recv-Q Send-Q Local Address           Foreign Address         State       PID/Program name
tcp        0      0 127.0.0.1:3306          0.0.0.0:*               LISTEN      14842/mysqld    
tcp        0      0 0.0.0.0:139             0.0.0.0:*               LISTEN      982/smbd        
tcp        0      0 127.0.0.1:39346         0.0.0.0:*               LISTEN      3405/GoogleTalkPlug
tcp        0      0 127.0.0.1:50995         0.0.0.0:*               LISTEN      3405/GoogleTalkPlug
tcp        0      0 127.0.0.1:5939          0.0.0.0:*               LISTEN      2412/teamviewerd
tcp        0      0 127.0.0.1:53            0.0.0.0:*               LISTEN      2429/dnsmasq    
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN      985/sshd        
tcp        0      0 127.0.0.1:631           0.0.0.0:*               LISTEN      1267/cupsd      
tcp        0      0 127.0.0.1:25            0.0.0.0:*               LISTEN      1748/exim4      
tcp        0      0 0.0.0.0:17500           0.0.0.0:*               LISTEN      2885/dropbox    
tcp        0      0 0.0.0.0:445             0.0.0.0:*               LISTEN      982/smbd        
tcp        0      0 127.0.0.1:8000          0.0.0.0:*               LISTEN      4134/python    
tcp6       0      0 :::139                  :::*                    LISTEN      982/smbd        
tcp6       0      0 :::80                   :::*                    LISTEN      1832/apache2    
tcp6       0      0 :::22                   :::*                    LISTEN      985/sshd        
tcp6       0      0 ::1:631                 :::*                    LISTEN      1267/cupsd      
tcp6       0      0 ::1:25                  :::*                    LISTEN      1748/exim4      
tcp6       0      0 :::445                  :::*                    LISTEN      982/smbd        
udp        0      0 127.0.0.1:53            0.0.0.0:*                           2429/dnsmasq    
udp        0      0 0.0.0.0:68              0.0.0.0:*                           2403/dhclient  
udp        0      0 128.54.44.214:123       0.0.0.0:*                           3430/ntpd      
udp        0      0 MYIP:123                0.0.0.0:*                           3430/ntpd      
udp        0      0 127.0.0.1:123           0.0.0.0:*                           3430/ntpd      
udp        0      0 0.0.0.0:123             0.0.0.0:*                           3430/ntpd      
udp        0      0 137.110.255.255:137     0.0.0.0:*                           2602/nmbd      
udp        0      0 MYIP:137                0.0.0.0:*                           2602/nmbd      
udp        0      0 128.54.47.255:137       0.0.0.0:*                           2602/nmbd      
udp        0      0 128.54.44.214:137       0.0.0.0:*                           2602/nmbd      
udp        0      0 0.0.0.0:137             0.0.0.0:*                           2602/nmbd      
udp        0      0 137.110.255.255:138     0.0.0.0:*                           2602/nmbd      
udp        0      0 MYIP:138                0.0.0.0:*                           2602/nmbd      
udp        0      0 128.54.47.255:138       0.0.0.0:*                           2602/nmbd      
udp        0      0 128.54.44.214:138       0.0.0.0:*                           2602/nmbd      
udp        0      0 0.0.0.0:138             0.0.0.0:*                           2602/nmbd      
udp        0      0 0.0.0.0:17500           0.0.0.0:*                           2885/dropbox    
udp        0      0 0.0.0.0:36889           0.0.0.0:*                           1356/avahi-daemon:
udp        0      0 0.0.0.0:5353            0.0.0.0:*                           1356/avahi-daemon:
udp6       0      0 ::1:123                 :::*                                3430/ntpd      
udp6       0      0 fe80::fab1:56ff:fe9:123 :::*                                3430/ntpd      
udp6       0      0 fe80::3e77:e6ff:fe6:123 :::*                                3430/ntpd      
udp6       0      0 :::123                  :::*                                3430/ntpd      
udp6       0      0 :::33792                :::*                                1356/avahi-daemon:
udp6       0      0 :::5353                 :::*                                1356/avahi-daemon:

Does anyone know what sapd, skysapd, sksapd, ksapd do? Are they viruses? I tried clamav it didn't recognized them as viruses.

I also realized that my /etc/rc.local has multiple copies of this:

nohup /etc/cupsdd > /dev/null 2>&1&
cd /etc;./ksapd
cd /etc;./kysapd
cd /etc;./atdd

I usually use Dropbox or Ubuntu One to sync my different devices. Now I need to sync contents of a folder with a folder on a Linux server. Note that I may make change files on both sides. The first one is my laptop and the second is a computing server that I have ssh access to (regular user but not root access).

When I try to connect using the Cisco AnyConnect VPN Client, I receive this error:

Connection attempt has failed due to server certificate problem.

I happened to have this problem in my previous Ubuntu 11.10 installation. That time I could fix it using some tutorials on the internet (I don't remember which one). Basically, they suggested installing 4-5 packages and then some ln -s. But this time none of them are working. Can anyone help me step by step?

I'm trying to connect to mysql server installed on my computer.

When I enter "telnet localhost 3306", I get some garbage characters meaning that I'm connected to the server.

But when I enter "telnet my_computer_name 3306", I am getting this error:

Trying 127.0.1.1...
telnet: Unable to connect to remote host: Connection refused

I know that I has something to do with the firewall.

I also pasted output of my iptables-save here: http://pastebin.com/rKMc1bG8

I tried to add a rule to accept incoming connecting to 3306 but no success. Any fix?

I have a folder that has many files and "rm -rf" takes a lot of time to complete. Is there any faster way to remove a directory and it's contents (subdirs, etc)?

I usually take screenshots printscreen which calls into gnome-screenshots. Today I noticed that it doesn't work when the context menu is open. The simplest case is when I right click on desktop and press printscreen nothing happens. Is this some sort of bug? Any knows how to fix this?

I have root access on a server and I can access my server through ssh and my server and my laptop run ubuntu. What's the easiest way to setup vpn server/client such that when I connect the vpn all of internet connections go through the server?

lspci gives me these two devices:

$ lspci | grep Audio
00:1b.0 Audio device: Intel Corporation 5 Series/3400 Series Chipset High Definition Audio (rev 05)
02:00.1 Audio device: ATI Technologies Inc RV710/730

There are two devices listed in System Settings|Sound|Output:

• RV710/730 Digital Stereo (HDMI)
• Internal Audio Analog Stereo

And finally, the are not muted!

Also, when I run an application that accesses the sound card, I can see it in the Applications tab.

Any ideas?

I'm getting this error when I want to configure an external monitor to connect it to my laptop.

requested position/size for CRTC 148 is outside the allowed limit: position=(1366, 0), size=(1366, 768), maximum=(1600, 1600)

Does any one know how to fix this?

I added a new profile for wired connection in Ubuntu's network manager|Edit Connections|Wired, but the new connection doesn't show up in the list of networks when I click on the network icon in system tray.

Does anyone know how to fix it?

I just installed Oneiric. The problem that I have with the unity desktop is that it's slow, and sometimes the keyboard just stops working while the mouse moves and I can click. At the same time I can press ctrl-alt-f1 to go to login mode and kill Xorg to come back. The thing that bugs me is that this is hapenning a lot of times and I'm thinking about installing gnome 2. I tried installing gnome-session-fallback but this doesn't seem to be a good gnome2 shell.

Does anyone know how to solve the keyboard issue? Or anyone knows how to install a decent gnome shell on Oneiric?

Thanks,