wsman: 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/wsman - from package: wsmancli

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

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