tycat: 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/tycat - from package: terminology

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