使用composer出现 Cannot find module (SNMPv2-TC) 等错误的解决方法

Cannot find module (SNMPv2-TC): At line 10 in /usr/share/snmp/mibs/UCD-DLMOD-MIB.txt
Cannot find module (SNMPv2-SMI): At line 34 in /usr/share/snmp/mibs/UCD-SNMP-MIB.txt
Cannot find module (SNMPv2-TC): At line 37 in /usr/share/snmp/mibs/UCD-SNMP-MIB.txt
Did not find 'enterprises' in module #-1 (/usr/share/snmp/mibs/UCD-SNMP-MIB.txt)
Did not find 'DisplayString' in module #-1 (/usr/share/snmp/mibs/UCD-SNMP-MIB.txt)
Did not find 'TruthValue' in module #-1 (/usr/share/snmp/mibs/UCD-SNMP-MIB.txt)
Unlinked OID in UCD-SNMP-MIB: ucdavis ::= { enterprises 2021 }
Undefined identifier: enterprises near line 39 of /usr/share/snmp/mibs/UCD-SNMP-MIB.txt
Did not find 'DisplayString' in module #-1 (/usr/share/snmp/mibs/UCD-DLMOD-MIB.txt)
Did not find 'ucdExperimental' in module UCD-SNMP-MIB (/usr/share/snmp/mibs/UCD-DLMOD-MIB.txt)
Unlinked OID in UCD-DLMOD-MIB: ucdDlmodMIB ::= { ucdExperimental 14 }
Undefined identifier: ucdExperimental near line 13 of /usr/share/snmp/mibs/UCD-DLMOD-MIB.txt
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' in module #-1 (/usr/share/snmp/mibs/UCD-DISKIO-MIB.txt)
Did not find 'ucdExperimental' in module UCD-SNMP-MIB (/usr/share/snmp/mibs/UCD-DISKIO-MIB.txt)
Unlinked OID in UCD-DISKIO-MIB: ucdDiskIOMIB ::= { ucdExperimental 15 }
Undefined identifier: ucdExperimental near line 19 of /usr/share/snmp/mibs/UCD-DISKIO-MIB.txt
Cannot find module (SNMPv2-TC): At line 15 in /usr/share/snmp/mibs/LM-SENSORS-MIB.txt
Did not find 'DisplayString' in module #-1 (/usr/share/snmp/mibs/LM-SENSORS-MIB.txt)
Did not find 'ucdExperimental' in module UCD-SNMP-MIB (/usr/share/snmp/mibs/LM-SENSORS-MIB.txt)
Unlinked OID in LM-SENSORS-MIB: lmSensors ::= { ucdExperimental 16 }
Undefined identifier: ucdExperimental near line 32 of /usr/share/snmp/mibs/LM-SENSORS-MIB.txt
Cannot find module (HOST-RESOURCES-MIB): At line 0 in (none)
Cannot find module (HOST-RESOURCES-TYPES): At line 0 in (none)
Cannot find module (SNMPv2-MIB): At line 0 in (none)
Cannot find module (IF-MIB): At line 0 in (none)
Cannot find module (IP-MIB): At line 0 in (none)
Cannot find module (TCP-MIB): At line 0 in (none)
Cannot find module (UDP-MIB): At line 0 in (none)
Cannot find module (NOTIFICATION-LOG-MIB): At line 0 in (none)

使用composer出现这种错误，是 remove 掉了snmp模块，使用命令

sudo apt-get remove php5-snmp

安装以后就不会有这种问题了