lsscsi: 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/lsscsi - from package: lsscsi

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

On Debian possible default full paths are:

/usr/bin/lsscsi - from package: lsscsi

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

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