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I have been adding rules/settings (not sure what the correct terminology is here) with tc/netem, such as tc qdisc add dev eth0 root netem delay 25ms, and have been removing them after use.

However, now I would like to check which rules/settings are still active. Is there a command to view or check all active netem rules? I think the equivalent iptables command is something like iptables -L.

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The command tc qdisc (or tc q) will show all active queueing disciplines, including any instances of netem. For example, after running the command tc qdisc add dev eth0 root netem delay 25ms, the output of tc q is:

qdisc netem 8005: dev eth0 root refcnt 2 limit 1000 delay 25.0ms

The man page for tc describes more options for displaying qdisc information.

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