installfont-tl: 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/installfont-tl - from package: texlive-extra-utils

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