tile4ms: 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/tile4ms - from package: mapserver

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

On Debian possible default full paths are:

/usr/bin/tile4ms - from package: mapserver-bin

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

Error in other languages:
tile4ms: bevel nie gevind nie
tile4ms: comandă negăsită
tile4ms: comando não encontrado
tile4ms: commande introuvable
tile4ms: command not found
tile4ms: käsku ei ole
tile4ms: không tìm thấy lệnh
tile4ms: komanda nerasta
tile4ms: Kommando nicht gefunden.
tile4ms: kommandot finns inte
tile4ms: komut yok
tile4ms: nie znaleziono polecenia
tile4ms: níor aimsíodh an t-ordú
tile4ms: no se encontró la orden
tile4ms: no s'ha trobat l'ordre
tile4ms: opdracht niet gevonden
tile4ms: parancs nem található
tile4ms: perintah tidak ditemukan
tile4ms: príkaz nenájdený
tile4ms: příkaz nenalezen
tile4ms: команда не найдена
tile4ms: командата не е открита
tile4ms: 命令找不到
tile4ms: コマンドが見つかりません