vym: 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/bin/vym - from package: vym

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

On Debian possible default full paths are:

/usr/bin/vym - from package: vym

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