A quick scan plus OS and version detection.

sudo nmap -sV -T4 -O -F --version-light 192.168.1.69

result:

Starting Nmap 6.40 ( http://nmap.org ) at 2016-07-08 02:00 BST
Nmap scan report for peter-laptop-1 (192.168.1.69)
Host is up (0.000025s latency).
Not shown: 97 closed ports
PORT    STATE SERVICE     VERSION
80/tcp  open  http        nginx 1.4.6 (Ubuntu)
139/tcp open  netbios-ssn Samba smbd 3.X (workgroup: PETER-LAPTOP-1)
445/tcp open  netbios-ssn Samba smbd 3.X (workgroup: PETER-LAPTOP-1)
No exact OS matches for host (If you know what OS is running on it, see http://nmap.org/submit/ ).
TCP/IP fingerprint:
OS:SCAN(V=6.40%E=4%D=7/8%OT=80%CT=7%CU=30522%PV=Y%DS=0%DC=L%G=Y%TM=577EFB5C
OS:%P=x86_64-pc-linux-gnu)SEQ(SP=105%GCD=1%ISR=108%TI=Z%CI=I%TS=8)SEQ(SP=10
OS:5%GCD=1%ISR=108%TI=Z%TS=8)OPS(O1=MFFD7ST11NW7%O2=MFFD7ST11NW7%O3=MFFD7NN
OS:T11NW7%O4=MFFD7ST11NW7%O5=MFFD7ST11NW7%O6=MFFD7ST11)WIN(W1=AAAA%W2=AAAA%
OS:W3=AAAA%W4=AAAA%W5=AAAA%W6=AAAA)ECN(R=Y%DF=Y%T=40%W=AAAA%O=MFFD7NNSNW7%C
OS:C=Y%Q=)T1(R=Y%DF=Y%T=40%S=O%A=S+%F=AS%RD=0%Q=)T2(R=N)T3(R=N)T4(R=Y%DF=Y%
OS:T=40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T5(R=Y%DF=Y%T=40%W=0%S=Z%A=S+%F=AR%O=%RD
OS:=0%Q=)T6(R=Y%DF=Y%T=40%W=0%S=A%A=Z%F=R%O=%RD=0%Q=)T7(R=Y%DF=Y%T=40%W=0%S
OS:=Z%A=S+%F=AR%O=%RD=0%Q=)U1(R=Y%DF=N%T=40%IPL=164%UN=0%RIPL=G%RID=G%RIPCK
OS:=G%RUCK=G%RUD=G)IE(R=Y%DFI=N%T=40%CD=S)
 
Network Distance: 0 hops
Service Info: OS: Linux; CPE: cpe:/o:linux:linux_kernel
 
OS and Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 29.78 seconds