htping: 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/htping - from package: gridsite-clients

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

On Debian possible default full paths are:

/usr/bin/htping - from package: gridsite-clients

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

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