cslinker: 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/cslinker - from package: csdiff

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

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