uncompress: 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/uncompress - from package: ncompress

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

On Debian possible default full paths are:

/bin/uncompress - from package: gzip

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

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