sginfo: 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/sginfo - from package: sg3_utils

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

On Debian possible default full paths are:

/usr/bin/sginfo - from package: sg3-utils

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

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