swac-explore: 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/swac-explore - from package: swac-explore

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