htproxyunixtime: command not found

Have You tried accessing the binary with the full path?

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/htproxyunixtime - from package: gridsite-clients

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

On Debian possible default full paths are:

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

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