ihex2txt: 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
/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/ihex2txt - from package: eep24c

You may install the required package with command apt-get install {package}
Error in other languages:
ihex2txt: bevel nie gevind nie
ihex2txt: comandă negăsită
ihex2txt: comando não encontrado
ihex2txt: commande introuvable
ihex2txt: command not found
ihex2txt: käsku ei ole
ihex2txt: không tìm thấy lệnh
ihex2txt: komanda nerasta
ihex2txt: Kommando nicht gefunden.
ihex2txt: kommandot finns inte
ihex2txt: komut yok
ihex2txt: nie znaleziono polecenia
ihex2txt: níor aimsíodh an t-ordú
ihex2txt: no se encontró la orden
ihex2txt: no s'ha trobat l'ordre
ihex2txt: opdracht niet gevonden
ihex2txt: parancs nem található
ihex2txt: perintah tidak ditemukan
ihex2txt: príkaz nenájdený
ihex2txt: příkaz nenalezen
ihex2txt: команда не найдена
ihex2txt: командата не е открита
ihex2txt: 命令找不到
ihex2txt: コマンドが見つかりません