zipcmp: 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/zipcmp - from package: libzip

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

On Debian possible default full paths are:

/usr/bin/zipcmp - from package: zipcmp

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

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