clang-check: 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/clang-check - from package: clang

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

On Debian possible default full paths are:

/usr/bin/clang-check - from package: clang
/usr/lib/llvm-3.4/bin/clang-check - from package: clang-3.4
/usr/lib/llvm-3.5/bin/clang-check - from package: clang-3.5

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

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