pathchk: 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/pathchk - from package: coreutils

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

On Debian possible default full paths are:

/usr/bin/pathchk - from package: coreutils

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

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