conjunct: 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/conjunct - from package: astronomical-almanac

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

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