Linux concurrent execution is simple, just do it this way

Concurrency Functions

time for i in `grep server /etc/hosts | awk '{print $1}'`; do (ssh $i "echo 123; sleep 1; echo 456" &); done

real 0m0.063s
user 0m0.016s
sys 0m0.004s

Concurrency capabilities of xargs

time grep server /etc/hosts | awk '{print $1}' | xargs -P 24 -I {} ssh {} "echo 123; sleep 1; echo 456"

real 0m3.747s
user 0m1.136s
sys 0m0.112s

Concurrency is actually very simple. It does not require dozens of lines of golang or python code, nor does it require installation environment, compilation and other tedious steps. Just return to basics.

Summarize
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