check_perms: 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/lib/mailman/bin/check_perms - from package: mailman

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

On Debian possible default full paths are:

/usr/lib/mailman/bin/check_perms - from package: mailman
/usr/sbin/check_perms - from package: mailman

You may install the required package with command apt-get install {package}

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