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fstefanov/ephymeral_ports.sh

Last active December 19, 2018 10:01
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Get two free random ports
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ephymeral_ports.sh
# Original version https://superuser.com/a/1293762/622572
export SERVER_PORT_SERVICE SERVER_PORT_ADMIN
readarray -t RANDOM_PORTS < <(
comm -23 <(seq 65000 65535) \
<(ss -ant \
| tail -n +1 \
| awk '{print $4}' \
| awk -F ":" '{print $NF}' \
| sort | uniq) \
| sort -R | head -n 2)
read SERVER_PORT_SERVICE SERVER_PORT_ADMIN <<< "${RANDOM_PORTS[@]}"
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