chkstow: 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/chkstow - from package: stow

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

On Debian possible default full paths are:

/usr/bin/chkstow - from package: stow

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

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