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#!/bin/bash
if [[ $# != 1 ]]; then
echo "Usage: $(basename $0) APN"
exit 1
fi
apn=$1
chat_file=/etc/ppp/peers/gsm_chat
sed -r -i "s/^OK\s+'AT\+CGDCONT=1,\"IP\",\"[^\"]*\"'$/OK 'AT\+CGDCONT=1,\"IP\",\"${apn}\"'/" $chat_file
if [[ $? != 0 ]]; then
echo "Failed to change APN"
exit 1
else
echo "Set APN to \"${apn}\" in $chat_file"
fi
exit 0
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