1）用tr命令
# grep -v "#" /etc/snmp/snmpd.conf |tr -s '\n'
2）用sed命令
# grep -v "#" /etc/snmp/snmpd.conf |sed '/^$/d'
3）用awk命令
# grep -v "#" /etc/snmp/snmpd.conf |awk '{if($0!="")print}'
4）用grep命令
# grep -v "#" /etc/snmp/snmpd.conf |grep -v "^$"
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