inputattach: 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/sbin/inputattach - from package: gpm

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

On Debian possible default full paths are:

/usr/bin/inputattach - from package: inputattach

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

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