genuca: command not found

Have You tried accessing the binary with the full path?

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/genuca - from package: icu

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