caja: 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/caja - from package: caja

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

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