klatexformula: 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/klatexformula - from package: klatexformula

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

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