adler32sum: 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/adler32sum - from package: dpm-contrib-admintools

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

Error in other languages:
adler32sum: bevel nie gevind nie
adler32sum: comandă negăsită
adler32sum: comando não encontrado
adler32sum: commande introuvable
adler32sum: command not found
adler32sum: käsku ei ole
adler32sum: không tìm thấy lệnh
adler32sum: komanda nerasta
adler32sum: Kommando nicht gefunden.
adler32sum: kommandot finns inte
adler32sum: komut yok
adler32sum: nie znaleziono polecenia
adler32sum: níor aimsíodh an t-ordú
adler32sum: no se encontró la orden
adler32sum: no s'ha trobat l'ordre
adler32sum: opdracht niet gevonden
adler32sum: parancs nem található
adler32sum: perintah tidak ditemukan
adler32sum: príkaz nenájdený
adler32sum: příkaz nenalezen
adler32sum: команда не найдена
adler32sum: командата не е открита
adler32sum: 命令找不到
adler32sum: コマンドが見つかりません