works great!

this works perfectly for my debian 7.8 checking for windows 2008 server.

however, when i loaded nagios on deb 8.1, and also checking on the same server, i’m getting errors:

Use of uninitialized value $os in substitution (s///) at ./check_snmp_memory line 251.
Use of uninitialized value $os in substitution (s///) at ./check_snmp_memory line 252.
Use of uninitialized value $os in substitution (s///) at ./check_snmp_memory line 253.
Use of uninitialized value $os in string eq at ./check_snmp_memory line 259.
Use of uninitialized value $os in string eq at ./check_snmp_memory line 259.
Use of uninitialized value $os in string eq at ./check_snmp_memory line 430.
Use of uninitialized value $os in string eq at ./check_snmp_memory line 540.