calligraauthor: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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/calligraauthor - from package: calligraauthor

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