htmkdir: 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/htmkdir - from package: gridsite-clients

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

On Debian possible default full paths are:

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

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

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