It's not harmful, but it really depends on what roles you're trying to land.
I usually recommend going for A+ then Network+, then Linux+ for new technicians at data centers.
If you're worried about interviewing, I can say from the other side of the table that actual projects and working through issues shows experience more clearly than simply studying for and passing a cert. Even something simple like setting your desktop/server to be the DHCP server (instead of the router being the DHCP server)