more: 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:

/bin/more - from package: util-linux-ng

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

On Debian possible default full paths are:

/bin/more - from package: util-linux

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

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