snmpc: 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/lib64/erlang/lib/snmp-4.21.1/bin/snmpc - from package: erlang-snmp

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

On Debian possible default full paths are:

/usr/bin/snmpc - from package: erlang-snmp
/usr/lib/erlang/lib/snmp-5.1/bin/snmpc - from package: erlang-snmp

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

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