slice2rb: 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

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/slice2rb - from package: ice35-translators

You may install the required package with command apt-get install {package}
Error in other languages:
slice2rb: bevel nie gevind nie
slice2rb: comandă negăsită
slice2rb: comando não encontrado
slice2rb: commande introuvable
slice2rb: command not found
slice2rb: käsku ei ole
slice2rb: không tìm thấy lệnh
slice2rb: komanda nerasta
slice2rb: Kommando nicht gefunden.
slice2rb: kommandot finns inte
slice2rb: komut yok
slice2rb: nie znaleziono polecenia
slice2rb: níor aimsíodh an t-ordú
slice2rb: no se encontró la orden
slice2rb: no s'ha trobat l'ordre
slice2rb: opdracht niet gevonden
slice2rb: parancs nem található
slice2rb: perintah tidak ditemukan
slice2rb: príkaz nenájdený
slice2rb: příkaz nenalezen
slice2rb: команда не найдена
slice2rb: командата не е открита
slice2rb: 命令找不到
slice2rb: コマンドが見つかりません