zsoelim: 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/zsoelim - from package: groff

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

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