oocalc: 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

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/oocalc - from package: libreoffice-calc

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