cypher: 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/cypher - from package: python-py2neo

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

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