htag: 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/htag - from package: htag

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

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