pagsh.openafs: command not found

Have You tried accessing the binary with the full path?

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/pagsh.openafs - from package: openafs-client

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