lablglut: 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 CentOS possible default full paths are:

/usr/bin/lablglut - from package: ocaml-lablgl

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/lablglut - from package: liblablgl-ocaml-dev

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

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