sw2asc: 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/sw2asc - from package: geda-utils

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

Error in other languages:
sw2asc: bevel nie gevind nie
sw2asc: comandă negăsită
sw2asc: comando não encontrado
sw2asc: commande introuvable
sw2asc: command not found
sw2asc: käsku ei ole
sw2asc: không tìm thấy lệnh
sw2asc: komanda nerasta
sw2asc: Kommando nicht gefunden.
sw2asc: kommandot finns inte
sw2asc: komut yok
sw2asc: nie znaleziono polecenia
sw2asc: níor aimsíodh an t-ordú
sw2asc: no se encontró la orden
sw2asc: no s'ha trobat l'ordre
sw2asc: opdracht niet gevonden
sw2asc: parancs nem található
sw2asc: perintah tidak ditemukan
sw2asc: príkaz nenájdený
sw2asc: příkaz nenalezen
sw2asc: команда не найдена
sw2asc: командата не е открита
sw2asc: 命令找不到
sw2asc: コマンドが見つかりません