unzipsfx: 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/unzipsfx - from package: unzip

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

On Debian possible default full paths are:

/usr/bin/unzipsfx - from package: unzip

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

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