insn_bits: command not found

Have You tried accessing the binary with the full path?

Maybe Your $PATH variable doesn't contain the default paths? echo $PATH should give something like:

[root@server ~]# echo $PATH

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_bits - from package: xenomai-runtime

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