gearadmin: 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/gearadmin - from package: gearmand

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

On Debian possible default full paths are:

/usr/bin/gearadmin - from package: gearman-tools

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

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