msql2mysql: 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/msql2mysql - from package: mysql55w
/usr/bin/msql2mysql - from package: mysql

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

On Debian possible default full paths are:

/usr/bin/msql2mysql - from package: mariadb-server-10.0
/usr/bin/msql2mysql - from package: mysql-server-5.5

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

Error in other languages:
msql2mysql: bevel nie gevind nie
msql2mysql: comandă negăsită
msql2mysql: comando não encontrado
msql2mysql: commande introuvable
msql2mysql: command not found
msql2mysql: käsku ei ole
msql2mysql: không tìm thấy lệnh
msql2mysql: komanda nerasta
msql2mysql: Kommando nicht gefunden.
msql2mysql: kommandot finns inte
msql2mysql: komut yok
msql2mysql: nie znaleziono polecenia
msql2mysql: níor aimsíodh an t-ordú
msql2mysql: no se encontró la orden
msql2mysql: no s'ha trobat l'ordre
msql2mysql: opdracht niet gevonden
msql2mysql: parancs nem található
msql2mysql: perintah tidak ditemukan
msql2mysql: príkaz nenájdený
msql2mysql: příkaz nenalezen
msql2mysql: команда не найдена
msql2mysql: командата не е открита
msql2mysql: 命令找不到
msql2mysql: コマンドが見つかりません