touch: 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:

/bin/touch - from package: coreutils

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

On Debian possible default full paths are:

/bin/touch - from package: coreutils
/usr/bin/touch - from package: coreutils
/usr/lib/plan9/bin/touch - from package: 9base

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

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