crtsv: 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 Debian possible default full paths are:

/usr/bin/crtsv - from package: qdbm-util

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

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