myproxy-admin-addservice: 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/sbin/myproxy-admin-addservice - from package: myproxy-admin

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

On Debian possible default full paths are:

/usr/sbin/myproxy-admin-addservice - from package: myproxy-admin

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

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