wb_command: 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/wb_command - from package: connectome-workbench

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

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