servlink: 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/servlink - from package: ircd-hybrid

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

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