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freerip
2012 Feb 02
1
Quick bash tip for finding free SIP extensions from your sip.conf
Created this function on one of my machines today, thought others might
find it useful:
freesip() {
comm -2 <(seq $2 $3) <(cat $1 | grep ^\\[ | sort | uniq | tr -d \[ | tr -d
\]) | grep ^[[:digit:]]
}
On RedHat/CentOS based systems you can create the following file to have
the function available on login:
/etc/profile.d/freesip.sh
# Free SIP extensions
freesip() {
comm -2 <(seq $...