cronで実行された時のexportされてる環境変数

centos7

export HOME="/home/unko"
export LANG="ja_JP.UTF-8"
export LOGNAME="unko"
export OLDPWD
export PATH="/usr/bin:/bin"
export PWD="/home/unko"
export SHELL="/bin/sh"
export SHLVL="2"
export USER="unko"
export XDG_RUNTIME_DIR="/run/user/1000"
export XDG_SESSION_ID="39"
export _="/usr/local/bin/test.php"