edquota: 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/sbin/edquota - from package: quota

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

On Debian possible default full paths are:

/usr/sbin/edquota - from package: quota

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

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