klatexformula_cmdl: 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_cmdl - from package: klatexformula

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

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