printcal: 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/printcal - from package: argyll

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

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