dialyzer: 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/dialyzer - from package: erlang-dialyzer
/usr/lib64/erlang/bin/dialyzer - from package: erlang-dialyzer
/usr/lib64/erlang/erts-5.8.5/bin/dialyzer - from package: erlang-dialyzer

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

On Debian possible default full paths are:

/usr/bin/dialyzer - from package: erlang-dialyzer
/usr/lib/erlang/bin/dialyzer - from package: erlang-dialyzer
/usr/lib/erlang/erts-6.2/bin/dialyzer - from package: erlang-dialyzer
/usr/lib/debug/usr/lib/erlang/bin/dialyzer - from package: erlang-dbg
/usr/lib/debug/usr/lib/erlang/erts-6.2/bin/dialyzer - from package: erlang-dbg

You may install the required package with command apt-get install {package}

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