transcalc: 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/transcalc - from package: transcalc

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

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