cdir: 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/cdir - from package: cdtool

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

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