在执行php -v 或者有时编译一个东西或输入某个命令的时候会出现： Cannot find module (MTA-MIB): At line 0 in (none) Cannot find module (NETWORK-SERVICES-MIB): At line 0 in (none) Cannot find module (SNMPv2-TC): At line 15 in /usr/share/snmp/mibs/UCD-DISKIO-MIB.txt Did not find ‘DisplayString