snmpinform: command not found

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH
/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin

If it's empty, You may set the PATH variable with this command

export PATH="/usr/local/sbin:/usr/local/bin:/sbin:/bin:/usr/sbin:/usr/bin:/root/bin"

On CentOS possible default full paths are:

/usr/bin/snmpinform - from package: net-snmp-utils

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/snmpinform - from package: snmp

You may install the required package with command apt-get install {package}

Error in other languages:
snmpinform: bevel nie gevind nie
snmpinform: comandă negăsită
snmpinform: comando não encontrado
snmpinform: commande introuvable
snmpinform: command not found
snmpinform: käsku ei ole
snmpinform: không tìm thấy lệnh
snmpinform: komanda nerasta
snmpinform: Kommando nicht gefunden.
snmpinform: kommandot finns inte
snmpinform: komut yok
snmpinform: nie znaleziono polecenia
snmpinform: níor aimsíodh an t-ordú
snmpinform: no se encontró la orden
snmpinform: no s'ha trobat l'ordre
snmpinform: opdracht niet gevonden
snmpinform: parancs nem található
snmpinform: perintah tidak ditemukan
snmpinform: príkaz nenájdený
snmpinform: příkaz nenalezen
snmpinform: команда не найдена
snmpinform: командата не е открита
snmpinform: 命令找不到
snmpinform: コマンドが見つかりません