how to see ubuntu server or desktop

christine

christine@

-All-Series:/etc$ sudo lsb_release -a

[sudo] password for christine: No LSB modules are available.Distributor ID:    UbuntuDescription:    Ubuntu 16.04.1 LTSRelease:    16.04Codename:    xenial

christine

-All-Series:/etc$ cd ~u-All-Series:~$ cat /proc/versionLinux version 4.4.0-62-generic (buildd@lcy01-30) (gcc version 5.4.0 20160609 (Ubuntu 5.4.0-6ubuntu1~16.04.4) ) #83-Ubuntu SMP Wed Jan 18 14:10:15 UTC 2017-All-Series:~$ dpkg --get-selections | grep linux-imagelinux-image-4.4.0-31-generic            installlinux-image-4.4.0-62-generic            installlinux-image-extra-4.4.0-31-generic        installlinux-image-extra-4.4.0-62-generic        installlinux-image-generic                install
dpkg --get-selections | grep linux-image | grep -v deinstall

If the currently installed linux-image package contains the word "server" in it, then you're running Ubuntu server.
For example, the current latest kernel package for Ubuntu 10.10 desktop:

linux-image-2.6.35-22-generic

And server:

linux-image-2.6.35-22-server

For a more generic package that should be the same across different versions of Ubuntu,

linux-image-generic

is the default package for Ubuntu desktop and

linux-image-server

is the default for the server edition.