mousetweaks: 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/mousetweaks - from package: mousetweaks

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

On Debian possible default full paths are:

/usr/bin/mousetweaks - from package: mousetweaks

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

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