chroot: 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/sbin/chroot - from package: coreutils

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

On Debian possible default full paths are:

/usr/sbin/chroot - from package: coreutils
/usr/lib/klibc/bin/chroot - from package: klibc-utils

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

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