we: 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/we - from package: xwpe

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