lamson: 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/lamson - from package: python-lamson

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

On Debian possible default full paths are:

/usr/bin/lamson - from package: python-lamson

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

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