Am getting an error while installing OpenSSH :
Err:2 http://security.ubuntu.com/ubuntu xenial-security/main i386
openssh-server i386 1:7.2p2-4ubuntu2.7 Could not resolve
'security.ubuntu.com' E: Failed to fetch
http://security.ubuntu.com/ubuntu/pool/main/o/openssh/openssh-sftp-server_7.2p2-4ubuntu2.7_i386.deb
Could not resolve 'security.ubuntu.com'
E: Failed to fetch
http://security.ubuntu.com/ubuntu/pool/main/o/openssh/openssh-server_7.2p2-4ubuntu2.7_i386.deb
Could not resolve 'security.ubuntu.com'
E: Unable to fetch some archives, maybe run apt-get update or try with
--fix-missing?