smbcquotas: 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/smbcquotas - from package: samba4-client
/usr/bin/smbcquotas - from package: samba-common

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

On Debian possible default full paths are:

/usr/bin/smbcquotas - from package: smbclient

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

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