pts: 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/bin/pts - from package: openafs-client

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

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