How do I see if someone is watching my computer?

[ralle12]

Hello,
I'm rater new to Ubuntu and see some services on with SSH for example and some weird things according to me in wireshark. How can I see if only I'm logged in and no one is mirroring my screen or taking information like log-in credentials and stuff?

Can I do any command that do so only I can make connections to websites and so so? And use the computer like I use to but be sure it's not mirrored or someone taking information of my computer?

Would love all the help I can get!

Regards Rasmus

[#&thj^%]

Hello,
I. How can I see if only I'm logged in and no one is mirroring my screen or taking information like log-in credentials and stuff?

Can I do any command that do so only I can make connections to websites and so so? And use the computer like I use to but be sure it's not mirrored or someone taking information of my computer?

Would love all the help I can get!

Regards Rasmus

To see logins:

last

to look at network activity:

sudo tcpdump -i ethX icmp and icmp[icmptype]=icmp-echo

Replace ethX with your device. Use "ip a" to see.

TCDump has flags as well:

-n avoid a (potentially slow) reverse DNS query
−i interface
icmp[icmptype]=icmp-echo    To print all ICMP packets that are echo requests/replies

[currentshaft]

,

[Rubi1200]

Perhaps if you post some of these "weird" results someone would be able to offer a better analysis.

[ralle12]

Thank you this helped me alot ty! rather new to Ubuntu as told so these commands can be hard to form yourself in the beginning!, ty!

[ralle12]

True, I have not done that, ifm it's no default config. But I think its rather not, right?

[ralle12]

very true, i will check later at home imf i have a dump from wireshark or so. Otherwise I will listen again and see if i "see" these what I think mysterious things are.