iscsid: 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:

/sbin/iscsid - from package: iscsi-initiator-utils

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

On Debian possible default full paths are:

/usr/sbin/iscsid - from package: open-iscsi

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

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