Steps Taken
sudo apt-get install maven

Error
Unpacking libgraphite2-3:amd64 (1.2.4-1ubuntu1) over (1.2.4-1ubuntu1) …
dpkg: unrecoverable fatal error, aborting:
fork failed: Cannot allocate memory
E: Sub-process /usr/bin/dpkg returned an error code (2)

Attempted Fix
sudo apt-get update (no change in error)

Other Info
On starting SSH I get the following error
Could not load list of meta packages: [Errno 12] Cannot allocate memory
Could not load list of meta packages: [Errno 12] Cannot allocate memory

On top <enter>
I get KiB Swap:0

FStab contains
UUID=050e1e34-39e6-4072-a03e-ae0bf90ba13a / ext4 errors=remount-ro 0 1
(I have checked the UUID from blkid)

can someone help me out?