gearmand: 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/gearmand - from package: gearmand

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

On Debian possible default full paths are:

/usr/sbin/gearmand - from package: gearman-job-server
/usr/bin/gearmand - from package: gearman-server

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

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