pminst: 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/pminst - from package: perl-pmtools

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

On Debian possible default full paths are:

/usr/bin/pminst - from package: pmtools

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

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