shtool: 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/shtool - from package: shtool

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

On Debian possible default full paths are:

/usr/bin/shtool - from package: shtool

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

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