visolate: 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/visolate - from package: visolate

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

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