ttinsert: 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/ttinsert - from package: ctn

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

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