insn_read: 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/insn_read - from package: xenomai-runtime

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

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