snippetbashTip

tc — Show/manipulate traffic control settings. More information: <https://manned.org/tc>.

Submitted by: @import:tldr-pages·Mar 2, 2026·

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commandshowtrafficmanipulateclicontrolsettingstc

linux

Problem

How to use the tc command: Show/manipulate traffic control settings. More information: <https://manned.org/tc>.

Solution

tc — Show/manipulate traffic control settings. More information: <https://manned.org/tc>.

Add constant network delay to outbound packages:

sudo tc {{[q|qdisc]}} {{[a|add]}} dev {{eth0}} root netem delay {{delay_in_milliseconds}}ms

Add normal distributed network delay to outbound packages:

sudo tc {{[q|qdisc]}} {{[a|add]}} dev {{eth0}} root netem delay {{mean_delay_ms}}ms {{delay_std_ms}}ms

Add package corruption/loss/duplication to a portion of packages:

sudo tc {{[q|qdisc]}} {{[a|add]}} dev {{eth0}} root netem {{corruption|loss|duplication}} {{effect_percentage}}%

Limit bandwidth, burst rate and max latency:

sudo tc {{[q|qdisc]}} {{[a|add]}} dev eth0 root tbf rate {{max_bandwidth_mb}}mbit burst {{max_burst_rate_kb}}kbit latency {{max_latency_before_drop_ms}}ms

Show active traffic control policies:

tc {{[q|qdisc]}} {{[s|show]}} dev {{eth0}}

Delete all traffic control rules:

sudo tc {{[q|qdisc]}} {{[d|delete]}} dev {{eth0}}

Change traffic control rule:

sudo tc {{[q|qdisc]}} {{[c|change]}} dev {{eth0}} root netem {{policy}} {{policy_parameters}}

Code Snippets

Add constant network delay to outbound packages

sudo tc {{[q|qdisc]}} {{[a|add]}} dev {{eth0}} root netem delay {{delay_in_milliseconds}}ms

Add normal distributed network delay to outbound packages

sudo tc {{[q|qdisc]}} {{[a|add]}} dev {{eth0}} root netem delay {{mean_delay_ms}}ms {{delay_std_ms}}ms

Add package corruption/loss/duplication to a portion of packages

sudo tc {{[q|qdisc]}} {{[a|add]}} dev {{eth0}} root netem {{corruption|loss|duplication}} {{effect_percentage}}%

Limit bandwidth, burst rate and max latency

sudo tc {{[q|qdisc]}} {{[a|add]}} dev eth0 root tbf rate {{max_bandwidth_mb}}mbit burst {{max_burst_rate_kb}}kbit latency {{max_latency_before_drop_ms}}ms

Show active traffic control policies

tc {{[q|qdisc]}} {{[s|show]}} dev {{eth0}}

Context

tldr-pages: linux/tc

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