txt2ihex: 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/txt2ihex - from package: eep24c

You may install the required package with command apt-get install {package}
Error in other languages:
txt2ihex: bevel nie gevind nie
txt2ihex: comandă negăsită
txt2ihex: comando não encontrado
txt2ihex: commande introuvable
txt2ihex: command not found
txt2ihex: käsku ei ole
txt2ihex: không tìm thấy lệnh
txt2ihex: komanda nerasta
txt2ihex: Kommando nicht gefunden.
txt2ihex: kommandot finns inte
txt2ihex: komut yok
txt2ihex: nie znaleziono polecenia
txt2ihex: níor aimsíodh an t-ordú
txt2ihex: no se encontró la orden
txt2ihex: no s'ha trobat l'ordre
txt2ihex: opdracht niet gevonden
txt2ihex: parancs nem található
txt2ihex: perintah tidak ditemukan
txt2ihex: príkaz nenájdený
txt2ihex: příkaz nenalezen
txt2ihex: команда не найдена
txt2ihex: командата не е открита
txt2ihex: 命令找不到
txt2ihex: コマンドが見つかりません