orderchr: 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 Debian possible default full paths are:

/usr/share/circos/tools/orderchr/bin/orderchr - from package: circos-tools

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

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