snmpget: 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/snmpget - 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/snmpget - from package: snmp

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

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