octovis: 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 CentOS possible default full paths are:

/usr/bin/octovis - from package: octomap-octovis

You may install the required package with command yum install {package}

On Debian possible default full paths are:

/usr/bin/octovis - from package: octovis

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

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