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new tab or new terminal

To monitor my system I usually open a terminal and run htop and then open another tab and run gkrellm. This is as a user without sudo privileges. I recently began using tcpspy and then tail syslog | grep tcpspy in yet another tab. However my user doesn't have sudo privileges so I have to su - to a user in the sudo group to do this.

Is it better from a security standpoint to su - in a tab as I have been doing or should I open another terminal for this user?

I am not overly paranoid and the programs used are irrelevant really and yes, I do realize I could get the same results as tcpspy without the privileged user using other commands such as ss or netstat. I am just curious what the implications of using mixed users with mixed privileges in a single terminal are if any.

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