sshkeys-lint: 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/sshkeys-lint - from package: gitolite

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

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