hb-view: 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/hb-view - from package: libharfbuzz-bin

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

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