ijoin: 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 Debian possible default full paths are:

/usr/bin/ijoin - from package: ispell

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

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