could you help me

[ahmad gamal]

it didn't work 

this is the first command 

Reading package lists... Done
Building dependency tree       
Reading state information... Done
linux-headers-2.6.35-22-generic is already the newest version.
linux-headers-2.6.35-22-generic set to manually installed.
0 upgraded, 0 newly installed, 0 to remove and 313 not upgraded.
a-gamal at agamal-Lenovo-G550:~$ 


the next command display this result

a-gamal at agamal-Lenovo-G550:/media/28D6AF2ED6AEFB68/s$ sudo apt-get install linux-headers-2.6.35-28-generic
[sudo] password for a-gamal: 
E: Could not get lock /var/lib/dpkg/lock - open (11: Resource temporarily unavailable)
E: Unable to lock the administration directory (/var/lib/dpkg/), is another process using it?
a-gamal at agamal-Lenovo-G550:/media/28D6AF2ED6AEFB68/s$ 



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