gitolite: 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/gitolite - from package: gitolite3

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

On Debian possible default full paths are:

/usr/bin/gitolite - from package: gitolite3

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