@server03:~$ sudo apt-get intstall libssl-dev
[sudo] password for nizar:
E: Invalid operation intstall
nizar@server03:~$ sudo apt-get install libssl-dev
Reading package lists... Done
Building dependency tree
Reading state information... Done
The following extra packages will be installed:
  libssl0.9.8
The following packages will be upgraded:
  libssl-dev libssl0.9.8
2 upgraded, 0 newly installed, 0 to remove and 267 not upgraded.
Need to get 5,027kB of archives.
After this operation, 28.7kB of additional disk space will be used.
Do you want to continue [Y/n]?
Get:1 http://ch.archive.ubuntu.com/ubuntu/ lucid-updates/main libssl-dev 0.9.8k-7ubuntu8.8 [2,012kB]
Get:2 http://ch.archive.ubuntu.com/ubuntu/ lucid-updates/main libssl-dev 0.9.8k-7ubuntu8.8 [2,012kB]
0% [2 libssl-dev 0B/2,012kB 0%]