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@ksexton
Created February 2, 2012 23:07
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Free SIP extensions
# Free SIP extensions
# Usage: freesip /etc/asterisk/sip.conf 200 299
freesip() {
comm -2 <(seq $2 $3) <(cat $1 | grep ^\\[ | sort | uniq | tr -d \[ | tr -d \]) | grep ^[[:digit:]]
}
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