schroot: 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/schroot - from package: schroot

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

On Debian possible default full paths are:

/usr/bin/schroot - from package: schroot

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

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