transterm: 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/transterm - from package: transtermhp

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