slice2cs: 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/slice2cs - from package: ice35-translators

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

Error in other languages:
slice2cs: bevel nie gevind nie
slice2cs: comandă negăsită
slice2cs: comando não encontrado
slice2cs: commande introuvable
slice2cs: command not found
slice2cs: käsku ei ole
slice2cs: không tìm thấy lệnh
slice2cs: komanda nerasta
slice2cs: Kommando nicht gefunden.
slice2cs: kommandot finns inte
slice2cs: komut yok
slice2cs: nie znaleziono polecenia
slice2cs: níor aimsíodh an t-ordú
slice2cs: no se encontró la orden
slice2cs: no s'ha trobat l'ordre
slice2cs: opdracht niet gevonden
slice2cs: parancs nem található
slice2cs: perintah tidak ditemukan
slice2cs: príkaz nenájdený
slice2cs: příkaz nenalezen
slice2cs: команда не найдена
slice2cs: командата не е открита
slice2cs: 命令找不到
slice2cs: コマンドが見つかりません