unifontpic: 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
/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/unifontpic - from package: unifont-bin

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