tos-ident-flags: 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/tos-ident-flags - from package: tinyos-tools

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

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